GB847621A - Process for the manufacture of aliphatic dicarboxylic acids - Google Patents
Process for the manufacture of aliphatic dicarboxylic acidsInfo
- Publication number
- GB847621A GB847621A GB628757A GB628757A GB847621A GB 847621 A GB847621 A GB 847621A GB 628757 A GB628757 A GB 628757A GB 628757 A GB628757 A GB 628757A GB 847621 A GB847621 A GB 847621A
- Authority
- GB
- United Kingdom
- Prior art keywords
- acid
- hydrogen
- metal salt
- catalyst
- dicarboxylic acids
- 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.)
- Expired
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
- C07C51/347—Preparation of carboxylic acids or their salts, halides or anhydrides by reactions not involving formation of carboxyl groups
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Aliphatic dicarboxylic acids are obtained by treating an aqueous solution or suspension of an alkali metal salt or alkaline earth metal salt of an aliphatic a -hydroxy- or a , a 1-dihydroxy dicarboxylic acid with hydrogen at an elevated temperature under superatmospheric pressure in the presence of a hydrogenation catalyst, e.g., Raney nickel or Raney cobalt. In the preferred procedure the catalyst is added to an aqueous solution or suspension of the alkali metal or alkaline earth metal salt and the mixture is treated with hydrogen at above 240 DEG C. and under a pressure of 100 to 300 atmospheres until no more hydrogen is absorbed. The catalyst is then filtered off and the filtrate acidified with sulphuric acid until a weakly acid reaction to Congo red is obtained and the whole is then extracted with ether. The lower fatty acids formed as by-products are removed from the ethereal extract and the dicarboxylic acids obtained in relatively pure state. Examples are given for the production of adipic acid from the calcium and sodium salts respectively of a , a 1-dihydroxyadipic acid and of glutaric acid from the sodium salt of a -hydroxy glutaric acid. Some valeric acid and tetrahydrofuran 2, 5-dicarboxylic acid are obtained as by-product in the example in which the calcium salt of a , a 1-dihydroxyadipic acid is used.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB628757A GB847621A (en) | 1957-02-25 | 1957-02-25 | Process for the manufacture of aliphatic dicarboxylic acids |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB628757A GB847621A (en) | 1957-02-25 | 1957-02-25 | Process for the manufacture of aliphatic dicarboxylic acids |
Publications (1)
Publication Number | Publication Date |
---|---|
GB847621A true GB847621A (en) | 1960-09-14 |
Family
ID=9811734
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB628757A Expired GB847621A (en) | 1957-02-25 | 1957-02-25 | Process for the manufacture of aliphatic dicarboxylic acids |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB847621A (en) |
-
1957
- 1957-02-25 GB GB628757A patent/GB847621A/en not_active Expired
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB476727A (en) | Improvements in the manufacture and production of interpolymerisation products | |
GB1509679A (en) | Process for the production of pure racemic acid and mesotartaric acid | |
GB847621A (en) | Process for the manufacture of aliphatic dicarboxylic acids | |
GB822834A (en) | A method of processing waste of polyethylene terephthalate by hydrolysis | |
US1551373A (en) | Herbert w | |
US1968300A (en) | Method of manufacturing aromatic carboxylic acids | |
GB553317A (en) | Improvements in the production of alkaline earth metal pantothenates | |
US2036134A (en) | Process for the manufacture of 1:2-diaminobenzene | |
GB845194A (en) | A di-tricyclodecane ether dicarboxylic acid and a process for its production | |
SU578855A3 (en) | Method of preparing 9,10-dioxy-and/or 6,7,9,10-tetraoxystearic acid | |
GB787128A (en) | Process for the production of esters and/or polyesters from a tricyclodecane derivative | |
SU451685A1 (en) | The method of obtaining 2-medoxy-5-chlorobenzoic acid | |
GB918511A (en) | Process for the manufacture of 2:5-diarylamino-terephthalic acids | |
GB648904A (en) | Process for the manufacture of 2:4:5-triamino-6-hydroxy-pyrimidine | |
US2407351A (en) | Process for the manufacture of o-sulphobenzoic acids | |
GB729625A (en) | Improvements in or relating to the preparation of non-odorous 2-methyl-4-chlorophenoxyacetic acid and its application as a selective weed-killer | |
GB855190A (en) | Process for the manufacture of aliphatic dicarboxylic acids | |
DE878652C (en) | Process for the preparation of aryloxycarboxylic acids containing alkylol groups | |
SU118403A1 (en) | Method for producing para-aminosalicylic acid | |
GB736074A (en) | Process for the manufacture of butyraldehyde | |
AT222661B (en) | Process for the preparation of tertiary hydroperoxides | |
GB899370A (en) | A process for the production of tropolone | |
ES312946A1 (en) | Procedure for the production of trans-4-aminomethylcyclohexan-1-carboxylic acid. (Machine-translation by Google Translate, not legally binding) | |
GB435721A (en) | Improvements in process for preparing metol | |
GB1450897A (en) | Production of salts of carboxylic acids |