DE1239675B - Process for the production of adipic acid by catalytic oxidation of cyclohexane - Google Patents
Process for the production of adipic acid by catalytic oxidation of cyclohexaneInfo
- Publication number
- DE1239675B DE1239675B DEJ20210A DEJ0020210A DE1239675B DE 1239675 B DE1239675 B DE 1239675B DE J20210 A DEJ20210 A DE J20210A DE J0020210 A DEJ0020210 A DE J0020210A DE 1239675 B DE1239675 B DE 1239675B
- Authority
- DE
- Germany
- Prior art keywords
- cyclohexane
- oxidation
- mixture
- water
- parts
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/16—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation
- C07C51/31—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation of cyclic compounds with ring-splitting
- C07C51/313—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation of cyclic compounds with ring-splitting with molecular oxygen
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C29/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
- C07C29/48—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by oxidation reactions with formation of hydroxy groups
- C07C29/50—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by oxidation reactions with formation of hydroxy groups with molecular oxygen only
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
- C07C45/27—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation
- C07C45/32—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation with molecular oxygen
- C07C45/33—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation with molecular oxygen of CHx-moieties
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
- C07C45/78—Separation; Purification; Stabilisation; Use of additives
- C07C45/81—Separation; Purification; Stabilisation; Use of additives by change in the physical state, e.g. crystallisation
- C07C45/82—Separation; Purification; Stabilisation; Use of additives by change in the physical state, e.g. crystallisation by distillation
- C07C45/83—Separation; Purification; Stabilisation; Use of additives by change in the physical state, e.g. crystallisation by distillation by extractive distillation
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/16—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation
- C07C51/31—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation of cyclic compounds with ring-splitting
- C07C51/316—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation of cyclic compounds with ring-splitting with oxides of nitrogen or nitrogen-containing mineral acids
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2601/00—Systems containing only non-condensed rings
- C07C2601/12—Systems containing only non-condensed rings with a six-membered ring
- C07C2601/14—The ring being saturated
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
BUNDESREPUBLIK DEUTSCHLANDFEDERAL REPUBLIC OF GERMANY
DEUTSCHESGERMAN
PATENTAMTPATENT OFFICE
AUSLEGESCHRIFTEDITORIAL
Int. CL:Int. CL:
C 07 cC 07 c
Deutsche Kl.: 12 ο -11German class: 12 ο -11
Nummer: 1 239 675Number: 1 239 675
Aktenzeichen: J 20210IV b/12 οFile number: J 20210IV b / 12 ο
Anmeldetag: 7. Juli 1961 Filing date: July 7, 1961
Auslegetag: 3. Mai 1967Open date: May 3, 1967
Die Erfindung betrifft ein verbessertes Verfahren zur Herstellung von Adipinsäure durch katalytische Oxydation von Cyclohexan.The invention relates to an improved process for the production of adipic acid by catalytic Oxidation of cyclohexane.
Es ist bekannt, Adipinsäure durch Oxydation von Cyclohexan mit einem sauerstoffhaltigen Gas unter Druck und in flüssiger Phase bei erhöhter Temperatur in ein Gemisch überzuführen, das teilweise aus Cyclohexanon und Cyclohexanol besteht, woraus dann durch weitere Oxydation mit Salpetersäure Adipinsäure erhalten werden kann. Zum Aufarbeiten des aus der Gasoxydationsstufe austretenden Gemisches kann man vor dem Weiterleiten in die Salpetersäureoxydationsstufe in dieses Gemisch Wasser einführen und dann das nicht umgesetzte Cyclohexan mit Wasserdampf abtreiben. Man hat das Zumischen von Wasser deshalb angewandt, um die Abscheidung von festen Stoffen aus dem die Oxydationsvorrichtung verlassenden Gemisch während seines Durchganges durch die Wärmeaustauscher, welche dazu dienen, das Oxydationsgemisch abzukühlen, bevor es in den Behälter gelangt, aus dem das Cyclohexan abdestilliert wird, zu verhindern. Dieser Behälter soll im folgenden als »Abstreifer« bezeichnet werden. " Es wurde nun gefunden, daß beträchtliche Vorteile hinsichtlich einer leichteren und wirtschaftlicheren Durchführung des Verfahrens dadurch erzielt werden und kein Verlust an Adipinsäure auftritt, wenn das Einführen von Wasser und die Abkühlung des Oxydationsgemisches weggelassen und das Oxydationsgemisch in den »Abstreifer« mit Hilfe eines Druckreduktionsventils eingelassen wird, welches dazu dient, den Flüssigkeitsstrom aus der das Oxydationsgemisch enthaltenden Vorlage in den Abstreifer zu regeln und die Druckdifferenz zwischen diesen Behältern aufrechtzuerhalten.It is known to take adipic acid by oxidizing cyclohexane with an oxygen-containing gas Pressure and in the liquid phase at elevated temperature to be converted into a mixture, which is partly composed of cyclohexanone and cyclohexanol, from which then, by further oxidation with nitric acid, adipic acid can be obtained. For working up the mixture emerging from the gas oxidation stage water can be introduced into this mixture before it is passed on to the nitric acid oxidation stage and then drive off the unreacted cyclohexane with steam. You have to mix in Water therefore applied to the separation of solids from the the oxidizer leaving mixture during its passage through the heat exchangers, which serve to to cool the oxidation mixture before it enters the container from which the cyclohexane is distilled off will prevent. In the following, this container will be referred to as the “scraper”. "It has now been found that there are considerable advantages in terms of a lighter and more economical Implementation of the process can be achieved and no loss of adipic acid occurs, if the introduction of water and the cooling of the oxidation mixture are omitted and the oxidation mixture is let into the "scraper" with the help of a pressure reduction valve, which serves, the liquid flow from the template containing the oxidation mixture into the To regulate the scrapers and to maintain the pressure difference between these containers.
Das erfindungsgemäße Verfahren zur Herstellung von Adipinsäure durch katalytische Oxydation von Cyclohexan mit einem sauerstoffhaltigen Gas unter Druck und in flüssiger Phase bei erhöhter Temperatur und anschließende weitere Oxydation des hierbei erhaltenen Gemisches nach Abtrennen von nicht umgesetztem Cyclohexan durch Wasserdampfdestillation mit Salpetersäure ist dadurch gekennzeichnet, daß man das Oxydationsgemisch der ersten Stufe zunächst ohne Abkühlen und Einführen von Wasser in die Destillationsvorrichtung für das Cyclohexan (»Abstreifer«) durch ein Ventil einführt, wobei das das Ventil passierende Gemisch eine Temperatur von nicht weniger als 140° C, vorzugsweise von 145 bis 155° C, besitzt und der Druck in der Destillationsvorrichtung unter dem vor, dem Ventil herrschenden liegt, worauf man die Temperatur und Verfahren zur Herstellung von Adipinsäure durch katalytische Oxydation von CyclohexanThe inventive method for the preparation of adipic acid by catalytic oxidation of Cyclohexane with an oxygen-containing gas under pressure and in the liquid phase at an elevated temperature and subsequent further oxidation of the mixture obtained in this way after separating off unreacted cyclohexane by steam distillation with nitric acid is characterized that the oxidation mixture of the first stage initially without cooling and introduction of Introduces water into the distillation device for the cyclohexane ("stripper") through a valve, whereby the mixture passing through the valve has a temperature of not less than 140 ° C, preferably of 145 to 155 ° C, and the pressure in the distillation device is below that prevailing in front of the valve lies on what to set the temperature and process for making adipic acid by catalytic oxidation of cyclohexane
Anmelder:Applicant:
Imperial Chemical Industries Limited, LondonImperial Chemical Industries Limited, London
Vertreter:Representative:
Dr.-Ing. H. Fincke, Dipl.-Ing. H. Bohr und Dipl.-Ing. S. Staeger, Patentanwälte, München 5, Müllerstr. 31Dr.-Ing. H. Fincke, Dipl.-Ing. H. Bohr and Dipl.-Ing. S. Staeger, Patent Attorneys, Munich 5, Müllerstr. 31
Als Erfinder benannt:Named as inventor:
Charles Brierley,Charles Brierley,
Norman Siddle Robson,Norman Siddle Robson,
James Clifford Ruddell,James Clifford Ruddell,
Francis George Webster, Manchester, Lancashire (Großbritannien)Francis George Webster, Manchester, Lancashire (Great Britain)
Beanspruchte Priorität:
Großbritannien vom 15. Juli 1960 (24 717), vom 16. Juni 1961Claimed priority:
Great Britain July 15, 1960 (24 717), June 16, 1961
Menge des in die Destillationsvorrichtung eingeführten Wasserdampfes so einstellt, daß der Rückstand der Wasserdampfdestillation vor seiner Weiteroxydation mit Salpetersäure einen Wassergehalt von bis 15 Gewichtsprozent besitzt und im wesentlichen frei von Cyclohexan ist.Adjusts the amount of steam introduced into the still so that the residue the steam distillation before its further oxidation with nitric acid a water content of to 15 percent by weight and is essentially free of cyclohexane.
Zur Vermeidung eines Abbaus der Bestandteile des Gemisches der Oxydation mit dem sauerstoffhaltigen Gas ist es zweckmäßig, daß keine wesentliche Verzögerung zwischen der Primäroxydation und der Einführung des Oxydationsgemisches in den »Abstreifer« entsteht. Der »Abstreifer« kann unter Normal- oder gegebenenfalls bei Unterdruck arbeiten. Infolge der von dem Oxydationsgemisch mitgeführten Wärme verdampft ein beträchtlicher Teil des Cyclohexans, wenn dieses durch das Reduktionsventil in den »Abstreifer« gelangt. Daher ist weniger Wärme zur Entfernung des restlichen Cyclohexans erforderlich, als wenn die bekannte Wassereinpreß- und Kühlstufe eingeschaltet wird.To avoid a breakdown of the constituents of the mixture of oxidation with the oxygen-containing one Gas it is convenient that there is no significant delay between primary oxidation and the introduction of the oxidation mixture into the "scraper". The "scraper" can under Normal or, if necessary, work under negative pressure. As a result of the entrained by the oxidation mixture Heat vaporizes a considerable part of the cyclohexane when it passes through the reduction valve into the "scraper". Hence is less Heat required to remove the remaining cyclohexane, as if the well-known water injection and cooling stage is switched on.
Die Temperatur und Menge des in den »Abstreifer« eingeführten Dampfes können so geregelt werden, daß der Rückstand der Wasserdampfdestillation den erforderlichen Wassergehalt von 8 bis 15 Gewichtsprozent besitzt. Hierdurch wird es ermöglicht,The temperature and quantity of the steam introduced into the »scraper« can be regulated in such a way that that the residue of the steam distillation has the required water content of 8 to 15 percent by weight owns. This enables
709 578/342709 578/342
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB24717/60A GB914510A (en) | 1960-07-15 | 1960-07-15 | Process for the manufacture of adipic acid |
Publications (1)
Publication Number | Publication Date |
---|---|
DE1239675B true DE1239675B (en) | 1967-05-03 |
Family
ID=10216133
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEJ20210A Pending DE1239675B (en) | 1960-07-15 | 1961-07-07 | Process for the production of adipic acid by catalytic oxidation of cyclohexane |
Country Status (5)
Country | Link |
---|---|
CH (1) | CH409915A (en) |
DE (1) | DE1239675B (en) |
FR (1) | FR1304056A (en) |
GB (1) | GB914510A (en) |
NL (1) | NL267041A (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1044446A (en) * | 1963-03-30 | 1966-09-28 | Inst Chemii Ogolnej | Improvements in or relating to a method of distilling chemical substances |
FR2749299B1 (en) † | 1996-06-04 | 1998-07-17 | Rhone Poulenc Fibres | PROCESS FOR THE PURIFICATION OF ADIPIC ACID IN WATER |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2557282A (en) * | 1949-03-31 | 1951-06-19 | Du Pont | Adipic acid process |
DE854505C (en) * | 1944-03-18 | 1952-11-04 | Basf Ag | Process for the preparation of aliphatic dicarboxylic acids |
US2703331A (en) * | 1953-11-06 | 1955-03-01 | Du Pont | Process for separating adipic acid precursors |
-
0
- NL NL267041D patent/NL267041A/xx unknown
-
1960
- 1960-07-15 GB GB24717/60A patent/GB914510A/en not_active Expired
-
1961
- 1961-07-07 DE DEJ20210A patent/DE1239675B/en active Pending
- 1961-07-13 FR FR867949A patent/FR1304056A/en not_active Expired
- 1961-07-14 CH CH832061A patent/CH409915A/en unknown
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE854505C (en) * | 1944-03-18 | 1952-11-04 | Basf Ag | Process for the preparation of aliphatic dicarboxylic acids |
US2557282A (en) * | 1949-03-31 | 1951-06-19 | Du Pont | Adipic acid process |
US2703331A (en) * | 1953-11-06 | 1955-03-01 | Du Pont | Process for separating adipic acid precursors |
Also Published As
Publication number | Publication date |
---|---|
FR1304056A (en) | 1962-09-21 |
CH409915A (en) | 1966-03-31 |
GB914510A (en) | 1963-01-02 |
NL267041A (en) |
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