CN103773485B - A kind of production method of base oil of high viscosity index lubricant - Google Patents
A kind of production method of base oil of high viscosity index lubricant Download PDFInfo
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Abstract
The present invention relates to a kind of production method of base oil of high viscosity index lubricant.The inventive method adopts waxy oil without the need to prefractionation as the raw material of hydroisomerization dewax, first the first hydroisomerization dewax reaction zone is entered, complete the hygrogenating isomerization reaction of Suitable depth, reaction product, after high pressure hot separator is separated with thermal low-pressure separators, obtains that pour point meets the demands, the light lubricating oil base oil product of high viscosity index (HVI) and the higher heavy base oil ingredient of pour point.Heavy base oil ingredient continues to enter the second hydroisomerization dewax reaction zone, after reaction product fractionation, obtains that pour point meets the demands, the heavy lubricant base stock product of high viscosity index (HVI).Compared with prior art, the inventive method can obtain the weight lubricant base that quality meets the demands, and technique is simple, and operation energy consumption is low.
Description
Technical field
The present invention relates to a kind of production method of base oil of high viscosity index lubricant.Be using wide fraction waxy oil directly as the charging of hydroisomerization dewax specifically, produce the method for base oil of high viscosity index lubricant.
Background technology
Traditional lubricant base is produced and is adopted solvent refining processes, and wherein, two key steps adopt the undesirable components such as solvent treatment removal aromatic hydrocarbons and solvent dewaxing to ensure the low temperature flowability of base oil.In addition, generally also carclazyte or hydrofinishing will be carried out.
Increasingly strict environmental legislation and developing rapidly of mechanical industry propose more and more higher requirement to the performance of lubricant base.Meanwhile, due to worldwide crude oil in poor quality, the crude oil quantity being suitable for producing lubricating oil is reduced gradually.Therefore, the development of hydrogenation method production Lubricating Oil Technique is very rapid.Hydrogenation method technique refers to the process adopting hydrocracking process or hydrotreatment-isomerization dewaxing-hydrofining process integration to produce lubricant base, and its advantage is that feed flexibility is large, base oil yield is high, by-product value is high.
The shortcoming that traditional hydroisomerization dewax process exists is, when adopting the waxy oil of full cut or wide fraction as charging, is difficult to make light lubricating oil component and heavy grease component meet the requirement of pour point and viscosity index simultaneously simultaneously.Generally, when heavy grease component pour point is qualified, the viscosity index loss of light lubricating oil component is comparatively large, is difficult to use in the APIIII class lighter body product of production viscosity index >120; And when light lubricating oil compositional viscosity index is qualified, heavy component can not as qualified lubricating oil component.
For the problems referred to above, currently available technology adopts carries out prefractionation by waxy oil, then using each narrow fraction as the charging of hydroisomerization dewax, solves the problem of producing high viscosity index (HVI) light lubricating oil base oil.US5,580,442 disclose a kind of method that hydrocracking tail oil produces base oil of high viscosity index lubricant.First hydrocracking tail oil is carried out decompression prefractionation, cut out 100 viscosity and be respectively 3mm
2/ s, 4mm
2/ s, 6mm
2/ s and 8mm
2four narrow fractions of/s, these narrow fractions carry out hydroisomerization dewax respectively, and 100 viscosity of production viscosity index >130 are respectively 3mm
2/ s, 4mm
2/ s, 6mm
2/ s and 8mm
2four kinds of lube base oil productions of/s.
US7,198,710 propose a kind of method of being produced base oil of high viscosity index lubricant by Fischer-Tropsch wax.First Fischer-Tropsch wax is carried out fractionation and obtain light constituent and heavy constituent, then carry out hydroisomerization dewax respectively and reduce raw material pour point, the light lubricating oil base oil that pour point meets the demands can be obtained.Hydroisomerization dewax heavy constituent due to pour point defective, adopt the method for solvent dewaxing to reduce the pour point of heavy constituent further, finally obtain the satisfactory heavy lubricant base stock product of pour point.
Adopt narrow fraction waxy oil as the feed process of hydroisomerization dewax, the method for production lightweight and heavy base oil of high viscosity index lubricant can be solved, but need to arrange multiple head tank, increase the construction investment of device; And often to switch raw material and frequent adjusting process parameter in actual production, considerably increase device operation easier and produce a large amount of substandard products.
Summary of the invention
For the deficiencies in the prior art, the invention provides a kind of production method of base oil of high viscosity index lubricant, waxy feeds oil, without fractionation, directly as the charging of hydroisomerization dewax, produces base oil of high viscosity index lubricant.
The production method of base oil of high viscosity index lubricant of the present invention comprises following content: with hydrotreatment distillate, the frivolous oil of hydrotreatment, one or more waxy oil in Fischer Tropsch waxes or hydrocracking tail oil are stock oil, first raw material and hydrogen mixing enter the first hydroisomerization dewax reaction zone, carry out hygrogenating isomerization reaction, reaction product is after high pressure hot separator is separated with thermal low-pressure separators, obtain lighter body product and heavy base oil ingredient respectively, by controlling the isomerization reaction degree of depth of the first hydroisomerization dewax reaction zone, light lubricating oil base oil product pour point is made to meet index request, and keep higher viscosity index, heavy base oil ingredient pour point obtained above is still higher, the second hydroisomerization dewax reaction zone is entered after mixing with hydrogen, by controlling the isomerization reaction degree of depth of the second hydroisomerization dewax reaction zone, the heavy lubricant base stock product pour point that fractionation is obtained is met, and keeps higher viscosity index.
In the inventive method, the viscosity index of the light lubricating oil base oil product (the thermal low-pressure separators top products that the first hydroisomerization dewax reaction zone liquid product obtains after thermal high is separated with thermal low-pressure separators) obtained and heavy lubricant base stock product (the second hydroisomerization dewax reaction zone liquid product distills 1 sideline product and bottom product that obtain) is all greater than 120, is generally 120 ~ 170.The pour point of light lubricating oil base oil product and heavy lubricant base stock product all lower than-10 DEG C, preferably lower than-15 DEG C.The pour point of light lubricating oil base oil product is-10 ~-30 DEG C, is preferably-15 ~-27 DEG C; The pour point of heavy lubricant base stock product is-10 ~-25 DEG C, is preferably-12 ~-21 DEG C.
In the inventive method, stock oil can be one or more in hydrotreatment distillate, the frivolous oil of hydrotreatment, Fischer Tropsch waxes or hydrocracking tail oil, and the sulphur content of these raw materials requires lower than 30 μ g/g, preferably lower than 15 μ g/g; Requirement of nitrogen lower than 5 μ g/g, preferably lower than 2 μ g/g.To reach the noble metal catalyst of hydroisomerization dewax use to the requirement of raw material impurity content.The hydrotreatment of distillate and frivolous oil or hydrocracking are this area ordinary method, generally use non-precious metal catalyst, and main purpose is the impurity such as deep removal sulphur, nitrogen.Any cut of boiling range within the scope of 280 ~ 700 DEG C of above-mentioned raw materials oil, general initial boiling point to the temperature head of final boiling point between 100 ~ 400 DEG C.The cut-point temperature obtaining lighter body product and heavy base oil ingredient is respectively 450 ~ 520 DEG C, namely in the thermal low-pressure separators behind the first hydroisomerization dewax reaction zone, the segmentation temperature (referring to true boiling point temperature) of light lubricating oil base oil product and heavy lubricant base stock component is 450 ~ 520 DEG C, boiling point is light lubricating oil base oil lower than the lubricant base of cut-point, and boiling point enters after the second hydroisomerization dewax reaction zone reacts fractionation further higher than the lube base oil ingredient of cut-point and obtains heavy lubricant base stock.
The lube oil hydrogenation heterogeneous catalyst that the hydroisomerization dewax catalyzer that the inventive method uses can select this area conventional, can commodity in use hydroisomerization catalyst, also can prepare by this area general knowledge.Hydroisomerization catalyst carrier is generally the NU-10 molecular sieve of aluminum oxide and TON structure or ZSM-22 molecular sieve etc., and molecular sieve content is in the catalyst 30wt% ~ 80wt%, is preferably 40wt% ~ 70wt%, also can adds partial oxidation silicon in carrier; Active metal component be in Pt, Pd, Ru and Rh one or more, content is in the catalyst 0.1wt% ~ 5.0wt%.Selectable adjuvant component is one or more in boron, fluorine, chlorine and phosphorus, and content is in the catalyst 0.1wt% ~ 5.0wt%; The specific surface of hydroisomerization catalyst is 150 ~ 500m
2/ g, pore volume is 0.15 ~ 0.60mL/g.Before using, reduction treatment is carried out to catalyzer, make hydrogenation active metals be in reduction-state in reaction process.The catalyzer that first hydroisomerization dewax reaction zone and the second hydroisomerization dewax reaction zone use can be selected in the hydroisomerization catalyst of foregoing description, two reaction zones can use identical hydroisomerization catalyst, also can use different hydroisomerization catalysts.
The reaction conditions in the first described hydroisomerization dewax district is: temperature is 280 DEG C ~ 350 DEG C, preferably 300 DEG C ~ 330 DEG C, and hydrogen dividing potential drop is 2.0MPa ~ 18.0MPa, preferably 10.0 ~ 15.0MPa, and during raw material fluid, volume space velocity is 0.4h
-1~ 6.0h
-1, preferred 0.8h
-1~ 1.8h
-1, hydrogen to oil volume ratio 400:1 ~ 1500:1, preferred 600:1 ~ 800:1.
The reaction conditions in the second described hydroisomerization dewax district is: temperature is 300 DEG C ~ 380 DEG C, preferably 310 DEG C ~ 340 DEG C, and hydrogen dividing potential drop is 2.0MPa ~ 18.0MPa, preferably 10.0 ~ 15.0MPa, and during raw material fluid, volume space velocity is 0.2h
-1~ 6.0h
-1, preferred 0.4h
-1~ 0.8h
-1, hydrogen to oil volume ratio 400:1 ~ 1500:1, preferred 600:1 ~ 800:1.
First hydroisomerization dewax district can be identical with the reaction conditions in the second hydroisomerization dewax district, also can be different, specifically requires to adjust according to quality product.Preferably the temperature of reaction in the second hydroisomerization dewax district is higher than 10 ~ 60 DEG C, the first hydroisomerization dewax district.
In the inventive method, the product liquid that the first hydroisomerization dewax district obtains after high pressure hot separator gas-liquid separation, then carries out flash separation through thermal low-pressure separators, and the liquid product that the second hydroisomerization dewax district obtains carries out fractionation in a vacuum still.The low pressure flash adopted and underpressure distillation well known to a person skilled in the art technology.High pressure hot separator temperature is 250 DEG C ~ 350 DEG C, preferably 280 DEG C ~ 320 DEG C, and hydrogen dividing potential drop is 2.0MPa ~ 18.0MPa, preferably 10.0 ~ 15.0MPa; Thermal low-pressure separators temperature is 220 DEG C ~ 340 DEG C, preferably 250 DEG C ~ 310 DEG C, and hydrogen dividing potential drop is 0.1MPa ~ 3.0MPa, preferably 0.2 ~ 1.5MPa; The condition of underpressure distillation is generally: vacuum still feeding temperature is 350 DEG C ~ 410 DEG C, and comparatively suitable feeding temperature is 375 DEG C ~ 400 DEG C; Vacuum still tower top pressure is 4KPa ~ 10KPa, and comparatively suitable tower top pressure is 5KPa ~ 8KPa; Underpressure distillation column overhead temperatures is 110 ~ 180 DEG C, can obtain some light-end products.The condition of low pressure flash and underpressure distillation generally can adjust in above-mentioned scope, obtains required product.
1 thermal low-pressure separators top products that thermal low-pressure separators vacuum flashing behind first hydroisomerization dewax district obtains, correspondingly obtains 1 light lubricating oil base oil, and light lubricating oil base oil 100 DEG C of viscosity are 2.5-4.5mm
2/ s, the temperature of the thermal low-pressure separators that light lubricating oil base oil is corresponding is 250 DEG C ~ 310 DEG C.
Vacuum still behind second hydroisomerization dewax district generally can be opened 1 side line and obtain 1 side line heavy lubricant base stock product, adds heavy lubricant base stock product at the bottom of tower, obtains 100 DEG C of viscosity respectively and is respectively 5.5-6.5mm
2/ s(sideline product) and 9.5-10.5mm
2/ s(bottom product) heavy lubricant base stock product, the temperature of side line is: 380 DEG C ~ 390 DEG C; Underpressure distillation column overhead temperatures is 110 ~ 180 DEG C, can obtain some light-end products.
Also hydrofinishing reaction zone be can increase behind each hydroisomerization dewax reaction zone in the inventive method, color and the stability of base oil product improved.Hydrofinishing catalyzer, for the reduced form Hydrobon catalyst of routine, its active metal is one or both or the active metal in Pt, Pd is reduced state nickel catalyzer, in noble metal catalyst, active metal is generally 0.05% ~ 1% at the weight content of catalyzer, the active metal of reduced state nickel catalyzer counts 30% ~ 80% with oxide weight, and support of the catalyst is generally Al
2o
3or Al
2o
3-SiO
2, can containing auxiliary agents such as P, Ti, B, Zr.Use procatalyst to carry out conventional reduction, ensure that hydrogenation active metals is in reduction-state in reaction process.This field general goods catalyzer can be selected, or by the preparation of this area usual way.
Described hydrofinishing reaction conditions is: temperature is 200 DEG C ~ 300 DEG C, preferably 210 DEG C ~ 280 DEG C, and hydrogen dividing potential drop is 6.0MPa ~ 18.0MPa, preferably 10.0 ~ 15.0MPa, and volume space velocity is 0.3h
-1~ 3.0h
-1, be preferably 0.6h
-1~ 1.2h
-1, hydrogen to oil volume ratio 400:1 ~ 1500:1, preferred 600:1 ~ 800:1.
The inventive method is by knowing the process analysis of waxy oil hydroisomerization dewax, under identical hydroisomerization dewax condition, the isomerization dewaxing degree of depth of weight component is different, for reaching identical pour point requirement, compared with light constituent, heavy constituent needs the higher isomerization dewaxing degree of depth.By controlling the depth of conversion of isomerization dewaxing process, make the weight component in waxy oil in different isomerization dewaxing reaction zones, reach the best dewaxing degree of depth respectively, thus realization is light, reach optimal balance point between the pour point of heavy lubricating oil base oil product and viscosity index.
Compared with prior art, the inventive method is without the need to carrying out prefractionation to waxy oil raw material, namely the method for producing the qualified lightweight of pour point and heavy base oil of high viscosity index lubricant can be solved, only a head tank need be set, the separation system of the first hydroisomerization dewax reaction zone liquid product comprises high pressure hot separator and thermal low-pressure separators, after thermal low-pressure separators is separated, the heavy basestock component temperature that separator bottom obtains is higher, can directly bring a large amount of heats into second hydroisomerizing reaction zone, thus the thermal load of the second hydroisomerizing reaction zone is reduced, also without the need to switching raw material and frequent adjusting process parameter in actual production, greatly reduce the construction investment of device and the operation easier of device, and drastically reduce the area the quantity of substandard product.
For employing concerning waxy oil raw material carries out the prior art of prefractionation, the narrow fraction that prefractionation obtains still needs after carrying out hydroisomerizing to carry out fractionation operation again, because generate oil nature to there occurs larger change after hydroisomerizing, the lube base that fractionation just can obtain required character need be carried out again, operation is comparatively complicated, and the energy consumption of twice fractionation is higher.
Accompanying drawing explanation
Fig. 1 is the inventive method process flow diagram.
Embodiment
The method that the present invention produces base oil of high viscosity index lubricant is specifically shown in Fig. 1: with one or more waxy oil in hydrotreatment distillate, the frivolous oil of hydrotreatment, Fischer-Tropsch wax or hydrocracking tail oil for raw material, first the first hydroisomerization dewax reaction zone is entered, carry out hygrogenating isomerization reaction, reaction product enters thermal low-pressure separators and carries out vacuum flashing fractionation after high pressure hot separator gas-liquid separation, and thermal low-pressure separators top and bottom obtain the qualified lightweight high viscosity index (HVI) base oil product of pour point and heavy base oil ingredient respectively.After heavy base oil ingredient mixes with hydrogen, continue to enter the second hydroisomerization dewax reaction zone, carry out hygrogenating isomerization reaction, reaction product carries out fractionation, obtains the heavy base oil of high viscosity index lubricant product that pour point meets the demands.
The various catalyzer that the present invention relates to can select commercial catalyst by character, also can prepare by this area knowledge.Hydroisomerization dewax catalyzer, also can by the existing patented technology preparation such as CN03133557.8, CN02133128.6 as the FIW-1 catalyzer of Fushun Petrochemical Research Institute's development and production.
As pressed as described in CN02133128.6, hydroisomerization dewax support of the catalyst is NU-10 molecular sieve or the ZSM-22 molecular sieve of aluminum oxide and TON structure; Molecular sieve content is in the catalyst 30wt% ~ 80wt%; Active metal component be in Pt, Pd, Ru, Rh and Ni one or more, content is in the catalyst 0.1wt% ~ 30.0wt%; Its specific surface is 150 ~ 500m
2/ g, pore volume is 0.15 ~ 0.60ml/g.
Particular content and the effect of the inventive method are described below by specific embodiment.
Implementation column below will be further described method provided by the invention, but scope not thereby limiting the invention.The feedstock property of process of the present invention is in table 1, and the physico-chemical property of the hydroisomerization dewax catalyzer of employing is in table 2.
Table 1 embodiment feedstock property
| Stock oil | Hydrocracking tail oil | Hydrotreatment VGO | Fischer Tropsch waxes |
| Density, kg/m 3 | 846 | 862 | 796 |
| Boiling range scope, DEG C | 322～510 | 345～535 | 290～652 |
| Viscosity (100 DEG C), mm 2/s | 6.35 | 8.548 | 12.23 |
| Pour point, DEG C | 32 | 34 | 105(melt drop temperature) |
| Sulphur, μ g/g | 5.0 | 14.0 | 2.0 |
| Nitrogen, μ g/g | 1.0 | 1.5 | 2.0 |
| Wax content, wt% | 24.8 | 30.1 | 6.71(oleaginousness) |
Table 2 catalyst property
| Catalyzer | Isomerization dewaxing |
| Chemical constitution, % by weight | |
| Platinum (Pt) | 0.2-0.5 |
| Physical properties | |
| Physical dimension (φ × L)/mm | (1.4-1.6)×(3～8) |
| Pore volume, mL/g 1 | ≥0.30 |
| Specific surface area, m 2/g 1 | ≥180 |
| Tap density, g/cm 3 | 0.65～0.75 |
| Crushing strength, N/cm 1 | ≥100 |
| Shape | Cylindrical bars |
Embodiment 1 ~ 3
Embodiment 1 ~ 3, raw material directly enters the first hydroisomerization dewax reaction zone, and product obtains lighter body product and heavy base oil ingredient through high pressure hot separator and thermal low-pressure separators fractionation; Heavy base oil ingredient enters the second hydroisomerization dewax reaction zone, and product obtains heavy base oil production through fractionation again.Raw material is respectively 3 kinds of raw materials listed in table 1, and wherein hydroisomerization dewax uses listed catalyzer in table 2, obtains result specifically in table 3.Hydroisomerization catalyst is implemented after reducing according to a conventional method.Thermal low-pressure separators top behind first hydroisomerization dewax reaction zone produces No. 4 base oils, and thermal low-pressure separators bottoms enters the second hydroisomerization dewax reaction zone; Vacuum still behind second hydroisomerization dewax reaction zone arranges a side line, and No. 6 base oils produced by side line, and bottom product produces No. 10 base oils.The cut-point of light lubricating oil base oil and heavy lubricant base stock controls to be 480 DEG C.
Comparative example 1
Comparative example 1 adopts hydrocracking tail oil raw material listed in table 1, adopts the technological process of single hydroisomerization dewax reaction zone production basis oil, uses hydroisomerization dewax catalyzer in the same manner as in Example 1, the results are shown in Table 3.
Comparative example 2
Comparative example 2 adopts hydrocracking tail oil raw material listed in table 1, hydrocracking tail oil is carried out prefractionation, obtains 100 DEG C of viscosity and be respectively 4.2mm
2/ s and 6.3mm
2/ s hydrocracking tail oil narrow fraction, then carries out the technological process of hydroisomerization dewax reaction respectively, uses hydroisomerization dewax catalyzer in the same manner as in Example 1, the results are shown in Table 3.
Comparative example 3
Comparative example 3 adopts F-T synthesis wax stock listed in table 1, will carry out Fischer-Tropsch wax prefractionation, and obtain 100 DEG C of viscosity and be respectively 4.05mm
2/ s, 6.5mm
2/ s and 8.46mm
2the Fischer-Tropsch wax narrow fraction of/s, then carries out the technological process of hydroisomerization dewax reaction respectively, uses hydroisomerization dewax catalyzer in the same manner as in Example 1, the results are shown in Table 3.
From table 3, the comparative data of embodiment and comparative example is known, concerning raw material does not carry out the prior art of prefractionation, can not obtain all qualified lubricant base.Raw material is carried out to the prior art of prefractionation process, although also can obtain qualified weight lubricant base, process is complicated.
The processing condition of table 3 embodiment and comparative example and result
| Test number | Embodiment 1 | Comparative example 1 | Comparative example 2 | Embodiment 2 | Embodiment 3 | Comparative example 3 |
| Stock oil | 1 | 1 | 1 | 2 | 3 | 3 |
| First isomerization dewaxing district processing condition | ||||||
| Temperature of reaction/DEG C | 305 | 320 | 305 | 308 | 316 | 340 |
| Reaction pressure/MPa | 9.0 | 9.0 | 9.0 | 12.0 | 15.0 | 15.0 |
| Hydrogen to oil volume ratio | 600 | 600 | 800 | 800 | 800 | 800 |
| Volume space velocity/h -1 | 1.2 | 1.0 | 1.2 | 1.2 | 1.0 | 0.7 |
| Second isomerization dewaxing work area skill condition | ||||||
| Temperature of reaction/DEG C | 320 | \ | \ | 325 | 345 | \ |
| Reaction pressure/MPa | 9.0 | \ | \ | 12.0 | 15.0 | \ |
| Hydrogen to oil volume ratio | 600 | \ | \ | 800 | 800 | \ |
| Volume space velocity/h -1 | 1.5 | \ | \ | 1.5 | 1.0 | \ |
| Base oil character | ||||||
| No. 4 base oils | ||||||
| Yield, quality % | 23.2 | 14.5 | 23.5 | 18.6 | 27.2 | 27.6 |
| Pour point/DEG C | -18 | -36 | -18 | -24 | -21 | -21 |
| Viscosity (100 DEG C), mm/s 2 | 4.198 | 4.282 | 4.261 | 3.985 | 4.212 | 4.01 |
| Viscosity index | 121 | 99 | 122 | 120 | 129 | 129 |
| No. 6 base oils | ||||||
| Yield, quality % | 19.6 | 17.8 | 19.5 | 29.1 | 15.3 | 16.5 |
| Pour point/DEG C | -18 | -24 | -18 | -21 | -18 | -18 |
| Viscosity (100 DEG C), mm/s 2 | 6.127 | 6.342 | 6.088 | 6.483 | 6.210 | 6.184 |
| Viscosity index | 126 | 111 | 126 | 125 | 136 | 135 |
| No. 10 base oils | ||||||
| Yield, quality % | 35.3 | 36.5 | * | 25.4 | 33.6 | 32.9 |
| Pour point/DEG C | -15 | -9 | * | -15 | -15 | -12 |
| Viscosity (100 DEG C), mm/s 2 | 10.021 | 9.984 | * | 5.583 | 8.210 | 8.324 |
| Viscosity index | 130 | 124 | * | 129 | 145 | 146 |
* product can not as lubricant base.
Claims (13)
1. the production method of a base oil of high viscosity index lubricant, with hydrotreatment distillate, the frivolous oil of hydrotreatment, one or more waxy oil in Fischer Tropsch waxes or hydrocracking tail oil are stock oil, it is characterized in that comprising following process: first raw material and hydrogen mixing enter the first hydroisomerization dewax reaction zone, carry out hygrogenating isomerization reaction, reaction product is after high pressure hot separator is separated with thermal low-pressure separators, obtain lighter body product and heavy base oil ingredient respectively, by controlling the isomerization reaction degree of depth of the first hydroisomerization dewax reaction zone, the light lubricating oil base oil product pour point obtained is made to meet index request, and keep higher viscosity index, heavy base oil ingredient pour point obtained above is still higher, the second hydroisomerization dewax reaction zone is entered after mixing with hydrogen, by controlling the isomerization reaction degree of depth of the second hydroisomerization dewax reaction zone, the heavy lubricant base stock product pour point that fractionation is obtained is met, and keeps higher viscosity index, wherein, the reaction conditions in the first hydroisomerization dewax district is: temperature is 280 DEG C ~ 350 DEG C, and hydrogen dividing potential drop is 2.0MPa ~ 18.0MPa, and during raw material fluid, volume space velocity is 0.4h-1 ~ 6.0h-1, hydrogen to oil volume ratio 400:1 ~ 1500:1, the reaction conditions in the second hydroisomerization dewax district is: temperature is 300 DEG C ~ 380 DEG C, and hydrogen dividing potential drop is 2.0MPa ~ 18.0MPa, and during raw material fluid, volume space velocity is 0.2h-1 ~ 6.0h-1, hydrogen to oil volume ratio 400:1 ~ 1500:1, first hydroisomerization dewax reaction zone and the second hydroisomerization dewax reaction zone use noble metal hydrogenation heterogeneous catalyst, hydroisomerization catalyst carrier is NU-10 molecular sieve or the ZSM-22 molecular sieve of aluminum oxide and TON structure, molecular sieve content is in the catalyst 30wt% ~ 80wt%, active metal component is Pt, content is in the catalyst 0.2wt% ~ 0.5wt%, the pore volume of catalyzer is >=0.3mL/g, physical dimension φ × L is (1.4-1.6) × (3 ~ 8) mm, specific surface area is >=180m2/g, tap density is 0.65 ~ 0.75g/cm3, crushing strength is >=100N/cm, shape is cylindrical bars.
2. in accordance with the method for claim 1, it is characterized in that: the sulphur content of stock oil is lower than 30 μ g/g, and nitrogen content is lower than 5 μ g/g.
3. according to the method described in claim 1 or 2, it is characterized in that: any cut of boiling range within the scope of 280 ~ 700 DEG C of stock oil, initial boiling point to the temperature head of final boiling point between 100 ~ 400 DEG C.
4. in accordance with the method for claim 1, it is characterized in that: the cut-point temperature obtaining lighter body product and heavy base oil ingredient is respectively 450 ~ 520 DEG C.
5. in accordance with the method for claim 1, it is characterized in that: the temperature of reaction in the second hydroisomerization dewax district is higher than 10 ~ 60 DEG C, the first hydroisomerization dewax district.
6. in accordance with the method for claim 1, it is characterized in that: the product liquid that the first hydroisomerization dewax district obtains is after high pressure hot separator gas-liquid separation, flash separation is carried out again through thermal low-pressure separators, wherein, high pressure hot separator temperature is 250 DEG C ~ 350 DEG C, hydrogen dividing potential drop is 2.0MPa ~ 18.0MPa, and thermal low-pressure separators temperature is 220 DEG C ~ 340 DEG C, and hydrogen dividing potential drop is 0.1MPa ~ 3.0MPa.
7. in accordance with the method for claim 1, it is characterized in that: the liquid product that the second hydroisomerization dewax district obtains carries out fractionation in vacuum still.
8. in accordance with the method for claim 7, it is characterized in that: the feeding temperature of vacuum still is 350 ~ 410 DEG C, and vacuum still tower top pressure is 4 ~ 10KPa, and underpressure distillation column overhead temperatures is 110 ~ 180 DEG C.
9. in accordance with the method for claim 6, it is characterized in that: the thermal low-pressure separators top behind the first hydroisomerization dewax district obtains light lubricating oil base oil, light lubricating oil base oil 100 DEG C of viscosity are 2.5-4.5mm
2/ s, the temperature of the thermal low-pressure separators that light lubricating oil base oil is corresponding is 250 DEG C ~ 310 DEG C.
10. in accordance with the method for claim 8, it is characterized in that: the vacuum still behind the second hydroisomerization dewax district arranges 1 side line and obtains 1 sideline product, add bottom product and obtain 100 DEG C of viscosity respectively and be respectively 5.5-6.5mm
2/ s and 9.5-10.5mm
2the heavy lubricant base stock product of/s, the temperature of side line is: 380 DEG C ~ 390 DEG C.
11. in accordance with the method for claim 1, it is characterized in that: the viscosity index of light lubricating oil base oil product and heavy lubricant base stock product is all greater than 120; The pour point of light lubricating oil base oil product is lower than-10 DEG C, and the pour point of heavy lubricant base stock product is lower than-10 DEG C.
12. in accordance with the method for claim 1, it is characterized in that: the pour point of light lubricating oil base oil product is-15 ~-27 DEG C, and the pour point of heavy lubricant base stock product is-12 ~-21 DEG C.
13. in accordance with the method for claim 1, it is characterized in that: behind each hydroisomerization dewax reaction zone, increase hydrofinishing reaction zone, improves color and the stability of base oil product.
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| CN112111300B (en) * | 2019-06-20 | 2023-04-07 | 国家能源投资集团有限责任公司 | Method for preparing lubricating oil base oil from Fischer-Tropsch hydrocracking tail oil |
| CN116064106A (en) * | 2021-10-31 | 2023-05-05 | 中国石油化工股份有限公司 | Hydrogenation method for producing high viscosity index lubricating oil base oil |
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| CN1257104A (en) * | 1998-12-16 | 2000-06-21 | 中国石油化工集团公司 | Method for producing base oil of high viscosity index lubricant |
| CN1703488A (en) * | 2002-10-08 | 2005-11-30 | 埃克森美孚研究工程公司 | Production of fuels and lube oils from fischer-tropsch wax |
| CN101173191A (en) * | 2006-11-01 | 2008-05-07 | 中国石油化工股份有限公司 | Method for producing lubricating oil basic oil |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1257104A (en) * | 1998-12-16 | 2000-06-21 | 中国石油化工集团公司 | Method for producing base oil of high viscosity index lubricant |
| CN1703488A (en) * | 2002-10-08 | 2005-11-30 | 埃克森美孚研究工程公司 | Production of fuels and lube oils from fischer-tropsch wax |
| CN101173191A (en) * | 2006-11-01 | 2008-05-07 | 中国石油化工股份有限公司 | Method for producing lubricating oil basic oil |
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