FI120651B - A method of reducing energy consumption by grinding a pulp suspension in a paper-making process - Google Patents
A method of reducing energy consumption by grinding a pulp suspension in a paper-making process Download PDFInfo
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- FI120651B FI120651B FI20075301A FI20075301A FI120651B FI 120651 B FI120651 B FI 120651B FI 20075301 A FI20075301 A FI 20075301A FI 20075301 A FI20075301 A FI 20075301A FI 120651 B FI120651 B FI 120651B
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- pulp suspension
- sodium bicarbonate
- process according
- pulp
- stoichiometric
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Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/001—Modification of pulp properties
- D21C9/002—Modification of pulp properties by chemical means; preparation of dewatered pulp, e.g. in sheet or bulk form, containing special additives
- D21C9/004—Modification of pulp properties by chemical means; preparation of dewatered pulp, e.g. in sheet or bulk form, containing special additives inorganic compounds
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/63—Inorganic compounds
- D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
- D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
- D21B1/14—Disintegrating in mills
- D21B1/16—Disintegrating in mills in the presence of chemical agents
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C3/00—Pulping cellulose-containing materials
- D21C3/02—Pulping cellulose-containing materials with inorganic bases or alkaline reacting compounds, e.g. sulfate processes
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
- D21D1/00—Methods of beating or refining; Beaters of the Hollander type
- D21D1/20—Methods of refining
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/63—Inorganic compounds
- D21H17/70—Inorganic compounds forming new compounds in situ, e.g. within the pulp or paper, by chemical reaction with other substances added separately
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Mechanical Engineering (AREA)
- Paper (AREA)
Description
Menetelmä energiankulutuksen vähentämiseksi massasuspension jauhatuksessa paperinvalmistusprosessissaA method for reducing energy consumption during pulping of pulp suspension in a papermaking process
Keksinnön ala 5Field of the Invention 5
Keksintö koskee menetelmää energiankulutuksen vähentämiseksi massasuspension jauhatuksessa paperinvalmistusprosessissa sekä epästoikiometrisen natriumbikarbonaatin käyttöä tässä paperinvalmistusprosessissa.The invention relates to a process for reducing energy consumption in the pulping of pulp slurries in the papermaking process and to the use of non-stoichiometric sodium bicarbonate in this papermaking process.
1010
Asiaankuuluvan tekniikan kuvausDescription of the relevant technology
Jauhatus on yksi tärkeimmistä erillisoperaatioista valmistettaessa paperinvalmistukseen käytetyistä kuiduista 15 korkealaatuisia papereita tai pahveja. Jauhatus on tärkeää sekä mekaanisen että kemiallisen massan ominaisuuksien kannalta. Jauhatuksen ja arkinmuodostuksen aikana vallitsevan kemiallisen ympäristön, kuten pH:n ja erilaisten metalli-ionien jne., tiedetään vaikuttavan arkin lopullisiin 20 ominaisuuksiin.Grinding is one of the most important separate operations for making high quality paper or paperboard fibers from papermaking. Grinding is important in terms of both mechanical and chemical pulp properties. The chemical environment prevailing during milling and sheet forming, such as pH and various metal ions, etc., is known to affect the final properties of the sheet.
Eräs ongelma, joka esiintyy valmistettaessa paperia tai i *,* pahvia kemiallisesta tai mekaanisesta massasta, on suuri i,: I energiankulutus massan jauhatuksen aikana. On suoritettu I ’* 25 lukuisia tutkimuksia, joissa on pyritty vähentämään *«<-* energiankulutusta jauhatuksessa. US-patentissa 5 007 985 tuodaan esiin menetelmä, jossa käytetään alkalia ' selluloosapitoiselle materiaalille kuitujen seinämiin *; sitoutuneiden happoryhmien neutraloimiseksi ja energian- = 30 kulutuksen vähentämiseksi jauhatuksen aikana, k,. US-patentissa 5 454 907 tuodaan esiin menetelmä kemiallisen ;Y: massan käsittelemiseksi paperinvalmistusprosessissa, jossa i menetelmässä energiankulutusta vähennetään käyttämällä jauhatuksen apuainetta, joka käsittää sulfonoitua 35 kitosaania. Julkaisussa WO 2004/053224 tuodaan esiin 2 kemiallisen massan käsittelymenetelmä, jossa jauhatuksen apuaine käsittää kompleksinmuodostajaa.One problem that occurs when making paper or i *, * cardboard from chemical or mechanical pulp is the high i, i energy consumption during pulp milling. There have been numerous studies of I '* 25 aimed at reducing * «<- * energy consumption in refining. U.S. Patent No. 5,007,985 discloses a process employing an alkali for cellulosic material on fiber walls *; to neutralize the bound acid groups and to reduce energy consumption = during milling, k. U.S. Patent No. 5,454,907 discloses a process for treating a chemical; Y: pulp in a papermaking process, in which method i reduces energy consumption by using a milling aid comprising sulfonated 35 chitosan. WO 2004/053224 discloses 2 chemical pulp processing methods wherein the refining aid comprises a complexing agent.
Edelleen on olemassa tarve vähentää energiankulutusta 5 massasuspension jauhatuksessa paperinvalmistusprosessissa massan yksinkertaisemman ja tehokkaamman käsittelyn avulla.There is still a need to reduce the energy consumption of the pulp slurry refining in the papermaking process by simpler and more efficient pulp treatment.
Keksintö 10Invention 10
Esillä olevan keksinnön päämääränä on aikaansaada massasuspension jauhatus paperinvalmistusprosessissa, jossa jauhatus on energiaa säästävä prosessi.It is an object of the present invention to provide pulping of a pulp suspension in a papermaking process in which grinding is an energy-saving process.
15 Keksinnön toisena päämääränä on aikaansaada jauhatus paperivalmistuksessa käytetylle massasuspensiolle, jonka kalsiumkovuusluku on laskenut.Another object of the invention is to provide a pulverization for a pulp suspension used in papermaking which has a reduced calcium hardness number.
Keksinnön päämääränä on lisäksi aikaansaada jauhatus 20 massasuspensiolle, jonka pH-arvo on säädelty ja sitä yllä- »ΓΙ pidetään toivotulla tasolla.It is a further object of the invention to provide grinding for a pulp suspension having a pH adjusted and maintained at a desired level.
' Esillä olevan hakemuksen mukainen keksintö on määritelty k..s liitteenä olevissa patenttivaatimuksissa, joiden sisältö 25 sisällytetään tähän viitteellä.The invention of the present application is defined in the appended claims, the contents of which are incorporated herein by reference.
Näin ollen esillä oleva keksintö koskee menetelmää energiankulutuksen vähentämiseksi massasuspension ‘jauhatuksessa paperinvalmistusprosessissa. Energian- 30 kulutuksen vähentäminen aikaansaadaan käsittelemällä V mainittua massasuspensiota, kun se viedään mainittuun '* jauhatukseen, epästoikiometrisella natriumbikarbonaatilla.Accordingly, the present invention relates to a method for reducing energy consumption in the pulping of pulp suspension during the papermaking process. Reduction of energy consumption is achieved by treating V with said pulp suspension when introduced into said '* milling, with non-stoichiometric sodium bicarbonate.
Natriumbikarbonaatilla tapahtuvasta käsittelystä johtuen mainitun massasuspension kalsiumkovuusluku laskee tasolle, 3 jolla on edullinen vaikutus energiankulutukseen, ja samalla pH-arvo säädetään toivotulle tasolle ja ylläpidetään siinä jauhatuksen ja edullisesti myös koko tätä seuraavan paperinvalmistuksen aikana.Due to the treatment with sodium bicarbonate, the calcium hardness number of said pulp suspension drops to a level 3 which has a beneficial effect on energy consumption, while adjusting the pH to the desired level and maintaining it during milling and preferably also during subsequent papermaking.
55
Esillä olevan keksinnön mukaisesti on aikaansaatu vesipitoisen massasuspension jauhatusmenetelmä, jossa jauhatus aikaansaadaan pienemmällä energiamäärällä. Tyypillisesti massasuspension kovuusluku on, sen jälkeen kun 10 sitä on laimennettu prosessivedellä, 10 °dH tai yli. Tämän on todettu johtavan lisääntyneeseen energiankulutukseen jauhatuksessa. Laimentamiseen käytetty paperikoneesta tuleva prosessivesi sisältää jonkin verran kalsiumkarbonaattia, jota käytetään täyteaineena paperia valmistettaessa.According to the present invention, there is provided a method of grinding an aqueous pulp suspension, wherein the milling is accomplished with less energy. Typically, the mass suspension has, after dilution with process water, a hardness of 10 ° dH or more. This has been found to lead to increased energy consumption in refining. The process water from the paper machine used for dilution contains some calcium carbonate, which is used as a filler in the manufacture of paper.
15 Esimerkiksi integroimattomassa tehtaassa kuiva massa sulputetaan käyttäen laimennukseen prosessivettä.15 For example, in a non-integrated mill, dry pulp is pulverized using process water for dilution.
Prosessivesi kierrätetään sulputukseen, ja kalsiumionien kertyminen aikaansaa jopa kohoavan kovuusluvun. Tämän on puolestaan havaittu kasvattavan energiankulutusta ,,, 20 jauhatuksessa.The process water is recycled to the pulp, and the accumulation of calcium ions results in an even higher hardness. This, in turn, has been found to increase energy consumption ,,, 20 in milling.
,**! Nyt on yllättäen todettu, että massasuspension jauhatus voidaan aikaansaada pienemmällä energiamäärällä, mikäli mainitun massasuspension kalsiumkovuusluku säädetään alle 10 °dH:seen epästoikiometrisella natriumbikarbonaatilla., **! It has now surprisingly been found that refining the pulp suspension can be achieved with less energy if the calcium hardness number of said pulp suspension is adjusted to below 10 ° dH with non-stoichiometric sodium bicarbonate.
2525
Keksinnön edullisen suoritusmuodon mukaisesti ,*··, kalsiumkovuusluku voidaan laskea alle 10 °dH.-seen, edullisesti alle 7 °dH:seen, käsittelemällä massasuspensiota epästoikiometrisella natriumbikarbonaattiliuoksella.According to a preferred embodiment of the invention, the calcium hardness number may be lowered to less than 10 ° dH, preferably less than 7 ° dH, by treating the pulp suspension with a non-stoichiometric sodium bicarbonate solution.
30 ’ ' = ’ Keksinnön edullisen suoritusmuodon mukaisesti massa- s '* suspension käsittely epästoikiometrisella natrium bikarbonaatilla suoritetaan ennen jauhatusta. Natrium-bikarbonaattiliuos tuotetaan saattamalla hiilidioksidikaasu 4 ja vastaavasti vesipitoinen natriumhydroksidi reagoimaan suhteessa, joka on 1,0-2,0, edullisesti 1,2-1,7 ja edullisemmin 1,5-1,6. Natriumhydroksidi- ja hiilidioksidi-syöttöjä voidaan lisätä massasuspensioon pulpperissa tai 5 varastotornissa lisäämällä näitä laimennukseen käytettyyn prosessiveteen.According to a preferred embodiment of the invention, the pulp suspension is treated with non-stoichiometric sodium bicarbonate before grinding. The sodium bicarbonate solution is produced by reacting carbon dioxide gas 4 and aqueous sodium hydroxide, respectively, in a ratio of 1.0 to 2.0, preferably 1.2 to 1.7, and more preferably 1.5 to 1.6. Sodium hydroxide and carbon dioxide feeds can be added to the pulp suspension in the pulper or 5 storage towers by adding them to the process water used for dilution.
Natriumhydroksidin ja hiilidioksidin lisäyksellä aikaansaadun natriumbikarbonaatin syöttö vastaa täten sitä, 10 joka on saavutettavissa lisäämällä liuotettua natriumbikarbonaattia, mutta tällä on se etu, että kiinteän natriumbikarbonaatin tilaa vievä ja sotkuinen käsittely vältetään. Toisaalta natriumhydroksidi on kemikaali, jota on runsaasti saatavilla paperitehtaalla, sillä sitä käytetään 15 moniin muihin tarkoituksiin. Hiilidioksidikaasua voidaan kehittää paikan päällä tai sitä voidaan ostaa, kuten halutaan. Hiilidioksidin syöttö suspensioon on teknisesti puhdasta ja helppoa.The feed of sodium bicarbonate obtained by the addition of sodium hydroxide and carbon dioxide thus corresponds to that which can be achieved by the addition of dissolved sodium bicarbonate, but with the advantage that the bulky and bulky treatment of solid sodium bicarbonate is avoided. On the other hand, sodium hydroxide is a chemical that is abundantly available in the paper mill as it is used for many other purposes. Carbon dioxide can be developed on site or purchased as desired. The supply of carbon dioxide to the suspension is technically pure and easy.
20 Hiilidioksidi on edullisesti kaasumaisessa muodossa, vaikkakin sitä voidaan lisätä vesipitoisena nesteenä ' 1 liuottamalla kaasumaista tai kiinteää hiilidioksidia veteen.The carbon dioxide is preferably in gaseous form, although it may be added as an aqueous liquid by dissolving gaseous or solid carbon dioxide in water.
1Γ * Natriumhydroksidia ja hiilidioksidia voidaan lisätä erikseen tai samanaikaisesti massasuspensioon tai laimennukseen 25 käytettyyn prosessiveteen.1Γ * Sodium hydroxide and carbon dioxide may be added separately or simultaneously to the pulp suspension or to the dilution water used in the process water.
Eräs lisäetu, joka liittyy käsittelyyn epästoikiometrisella natriumbikarbonaatilla, liittyy siihen, että pH-arvoa voidaan säädellä ja sitä voidaan ylläpitää myös 30 aikaansaamalla sopiva natriumbikarbonaatin ja hiilidioksidin välinen suhde. Tämän suhteen tulisi olla riittävä tuottamaan - merkittävä puskurivaikutus pH-arvossa, joka on 6,0-8,0.A further advantage associated with treatment with non-stoichiometric sodium bicarbonate is that the pH can be adjusted and maintained by providing a suitable ratio of sodium bicarbonate to carbon dioxide. This ratio should be sufficient to produce - a significant buffer effect at pH 6.0-8.0.
Menetelmiä massasuspension pH-arvon stabiloimiseksi toivotulle tasolle on tuotu esiin patenttijulkaisuissa USMethods for stabilizing the pH of the pulp suspension to the desired level are disclosed in U.S. Pat.
5 6 991 705 ja US 7 175 759, jotka ovat esillä olevan hakijan patentteja. Tämä menetelmä soveltuu pH-arvon säätämiseen myös tässä keksinnössä. Massasuspensio puskuroidaan edullisesti natriumhydroksidin ja hiilidioksidin 5 yhdistelmällä pH-arvoon, joka on alle 8,0 ja yli 6,0, edullisesti alle 7,3 ja yli 7,0.5 6 991 705 and US 7 175 759, which are patents of the present applicant. This method is also suitable for adjusting the pH in the present invention. The pulp suspension is preferably buffered with a combination of sodium hydroxide and carbon dioxide to a pH of less than 8.0 and more than 6.0, preferably less than 7.3 and more than 7.0.
Tämän keksinnön mukaisesti energiankulutusta jauhatuksessa voidaan laskea 25-70 % verrattuna samankaltaiseen 10 jauhatukseen, joka suoritetaan suspensiolle, jolla on sama pH, mutta jota ei ole käsitelty mainitulla epä- stoikiometrisella natriumbikarbonaatilla.According to the present invention, the energy consumption in refining can be reduced by 25-70% compared to a similar refining for a suspension of the same pH but not treated with said non-stoichiometric sodium bicarbonate.
Massasuspensio voi olla valkaistu tai valkaisematon 15 kemiallinen tai mekaaninen massa.The pulp suspension may be a bleached or unbleached chemical or mechanical pulp.
Kalsiumkarbonaattia voidaan edullisesti käyttää täyteaineena massassa jauhatuksen jälkeen, koska stabiloitu pH takaa sen, että täyteaine pysyy kiinteässä muodossa suspensiossa.Calcium carbonate can advantageously be used as a filler in the pulp after grinding, since stabilized pH ensures that the filler remains in solid form in suspension.
20 VV Esillä oleva keksintö koskee myös menetelmää energian- I 1 kulutuksen vähentämiseksi massasuspension jauhatuksessa ‘VV ‘ paperinvalmistusprosessissa, mainitun menetelmän käsittäessä seuraavat vaiheet: 25 - aikaansaadaan massasuspensio, joka sisältää kiinteää • kalsiumkarbonaattia ensimmäisessä pH-arvossa; . ** - yhdistetään natriumhydroksidia ja hiilidioksidia suhteessa, joka tuottaa natriumbikarbonaattia pH-arvossa, joka on 7,0-8,5: ’’’ 30 - lisätään mainittua natriumbikarbonaattia mainittuun • 1 massasuspensioon mainitun massasuspension pH-arvon ’* - säätämiseksi toiseen pH-arvoon, joka on alle 8,0 ja yli 6,0, ja säädetään mainitun massasuspension kovuus arvoon, joka on alle 10 °dH; ja 6 jauhetaan mainittua massasuspensiota mainitussa toisessa pH-arvossa ja mainitussa kovuusluvussa.The present invention also relates to a process for reducing energy consumption in the pulping of pulp slurry 'VV' in a papermaking process, said method comprising the steps of: - providing a pulp suspension containing solid calcium carbonate at a first pH; . ** - combining sodium hydroxide and carbon dioxide in a ratio which produces sodium bicarbonate at a pH of 7.0-8.5: - "- adding said sodium bicarbonate to said • 1 mass suspension to adjust the pH of said mass suspension" * - less than 8.0 and more than 6.0, and adjusting the hardness of said pulp suspension to a value less than 10 ° dH; and 6 milling said pulp suspension at said second pH and at said hardness number.
Esillä oleva keksintö koskee myös epästoikiometrisen 5 natriumbikarbonaatin käyttöä energiankulutuksen vähentämiseksi massasuspension jauhatuksessa paperinvalmistusprosessissa sekä edelleen epästoikiometrisen natriumbikarbonaatin käyttöä jauhetusta suspensiosta valmistetun paperin lujuuden lisäämiseksi.The present invention also relates to the use of non-stoichiometric sodium bicarbonate to reduce energy consumption in the pulping of pulp suspension in the papermaking process, and further to the use of non-stoichiometric sodium bicarbonate to increase the strength of the paper made from the pulverized suspension.
10 Keksintöä havainnollistetaan seuraavien esimerkkien avulla, joiden ei tule tulkita rajoittavan keksintöä millään tavoin.The invention is illustrated by the following examples, which are not to be construed as limiting the invention in any way.
Esimerkki 1 15 Paperitehtaalla kraftmassasuspensio syötettiin jauhinkyyppiin. Massaan lisättiin natriumhydroksidia ja hiilidioksidia 1,5-1,6 olevassa suhteessa, jolloin syntyy natriumbikarbonaattia. Massasuspension kovuusluku ja pH määritetään jauhatuksen yhteydessä. Saadut tulokset on * ’ 20 esitetty taulukossa 1.Example 1 At a paper mill, a kraft pulp suspension was fed to a refiner type. Sodium hydroxide and carbon dioxide were added to the pulp in a ratio of 1.5 to 1.6 to form sodium bicarbonate. The hardness number and pH of the pulp suspension are determined during milling. The results obtained are shown in Table 1.
: ·’ Taulukko 1: ·' Table 1
; Koe nro Kovuus °dH Energian pH; Test No. Hardness ° dH Energy pH
• '/ säästö-% _____ g 1 §Ö 772• '/ savings-% _____ g 1 §Ö 772
NaHC03 5 60 7,2 1:1 Verrokki 16 7,2 1" (NaOH)NaHCO 3 5 60 7.2 1: 1 Control 16 7.2 1 "(NaOH)
Kovuusluku laski merkittävästi, kun jauhatuksessa käytettiin 25 natriumbikarbonaattia. Tulokset osoittavat merkitsevällä tavalla, että energiankulutus jauhatuksessa vähenee.The hardness figure decreased significantly when using 25 sodium bicarbonates for milling. The results significantly show that energy consumption during refining is reduced.
Claims (17)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI20075301A FI120651B (en) | 2007-04-30 | 2007-04-30 | A method of reducing energy consumption by grinding a pulp suspension in a paper-making process |
PCT/EP2008/055340 WO2008132228A1 (en) | 2007-04-30 | 2008-04-30 | A method for reducing the energy consumption at the refining of a pulp suspension in a papermaking process and use of sodium bicarbonate in papermaking |
EP08749924A EP2140064A1 (en) | 2007-04-30 | 2008-04-30 | A method for reducing the energy consumption at the refining of a pulp suspension in a papermaking process and use of sodium bicarbonate in papermaking |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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FI20075301 | 2007-04-30 | ||
FI20075301A FI120651B (en) | 2007-04-30 | 2007-04-30 | A method of reducing energy consumption by grinding a pulp suspension in a paper-making process |
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FI20075301A0 FI20075301A0 (en) | 2007-04-30 |
FI20075301A FI20075301A (en) | 2008-10-31 |
FI120651B true FI120651B (en) | 2010-01-15 |
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FI20075301A FI120651B (en) | 2007-04-30 | 2007-04-30 | A method of reducing energy consumption by grinding a pulp suspension in a paper-making process |
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EP (1) | EP2140064A1 (en) |
FI (1) | FI120651B (en) |
WO (1) | WO2008132228A1 (en) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
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DK2808440T3 (en) | 2009-03-30 | 2019-09-30 | Fiberlean Tech Ltd | Process for the preparation of nanofibrillar cellulose suspensions |
SI2805986T1 (en) | 2009-03-30 | 2018-04-30 | Fiberlean Technologies Limited | Process for the production of nano-fibrillar cellulose gels |
GB0908401D0 (en) | 2009-05-15 | 2009-06-24 | Imerys Minerals Ltd | Paper filler composition |
PT2386683E (en) | 2010-04-27 | 2014-05-27 | Omya Int Ag | Process for the production of gel-based composite materials |
ES2467694T3 (en) | 2010-04-27 | 2014-06-12 | Omya Development Ag | Process for manufacturing structured materials using nanofibrillar cellulose gels |
GB201019288D0 (en) | 2010-11-15 | 2010-12-29 | Imerys Minerals Ltd | Compositions |
CN103362012B (en) * | 2013-07-12 | 2015-06-10 | 海南金海浆纸业有限公司 | Fiber and filler mixed enzymatic defibrination method |
MX2018004245A (en) | 2015-10-14 | 2018-08-01 | Fiberlean Tech Ltd | 3d-formable sheet material. |
DK3440259T3 (en) | 2016-04-05 | 2021-03-29 | Fiberlean Tech Ltd | PAPER AND PAPER PRODUCTS |
US11846072B2 (en) | 2016-04-05 | 2023-12-19 | Fiberlean Technologies Limited | Process of making paper and paperboard products |
AU2017252019B2 (en) | 2016-04-22 | 2019-09-12 | Fiberlean Technologies Limited | Fibres comprising microfibrillated cellulose and methods of manufacturing fibres and nonwoven materials therefrom |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
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SE456826B (en) * | 1986-04-18 | 1988-11-07 | Svenska Traeforskningsinst | SET TO REDUCE ENERGY CONSUMPTION BY REFINING CELLULOSALLY MATERIAL |
SE8903710D0 (en) * | 1989-11-06 | 1989-11-06 | Svenska Traeforskningsinst | SET TO MAKE CELLULOUS MASS |
JP2940563B2 (en) * | 1990-12-25 | 1999-08-25 | 日本ピー・エム・シー株式会社 | Refining aid and refining method |
AU4271596A (en) * | 1995-12-19 | 1997-07-14 | Kvaerner Hymac Inc. | Process for treating refiner pulp |
US6159335A (en) * | 1997-02-21 | 2000-12-12 | Buckeye Technologies Inc. | Method for treating pulp to reduce disintegration energy |
FI102911B1 (en) * | 1997-06-13 | 1999-03-15 | Aga Ab | A method for stabilizing the pH of a pulp suspension and producing paper from the stabilized pulp |
FI111177B (en) * | 2001-12-12 | 2003-06-13 | Linde Ag | Device and method for controlling alkalinity and pH in an industrial process |
SE0203673D0 (en) * | 2002-12-12 | 2002-12-12 | Skogsind Tekn Foskningsinst | Method of treatment of pulp |
US7726592B2 (en) * | 2003-12-04 | 2010-06-01 | Hercules Incorporated | Process for increasing the refiner production rate and/or decreasing the specific energy of pulping wood |
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2007
- 2007-04-30 FI FI20075301A patent/FI120651B/en not_active IP Right Cessation
-
2008
- 2008-04-30 EP EP08749924A patent/EP2140064A1/en not_active Withdrawn
- 2008-04-30 WO PCT/EP2008/055340 patent/WO2008132228A1/en active Application Filing
Also Published As
Publication number | Publication date |
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EP2140064A1 (en) | 2010-01-06 |
WO2008132228A1 (en) | 2008-11-06 |
FI20075301A (en) | 2008-10-31 |
FI20075301A0 (en) | 2007-04-30 |
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