GB533648A - Improvements in or relating to the production of valuable organic acids - Google Patents
Improvements in or relating to the production of valuable organic acidsInfo
- Publication number
- GB533648A GB533648A GB23775/39A GB2377539A GB533648A GB 533648 A GB533648 A GB 533648A GB 23775/39 A GB23775/39 A GB 23775/39A GB 2377539 A GB2377539 A GB 2377539A GB 533648 A GB533648 A GB 533648A
- Authority
- GB
- United Kingdom
- Prior art keywords
- nickel
- sodium
- acids
- hydrogenation
- solution
- 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
- C07C51/36—Preparation of carboxylic acids or their salts, halides or anhydrides by reactions not involving formation of carboxyl groups by hydrogenation of carbon-to-carbon unsaturated bonds
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
533,648. Propionic and adipic acids. DU PONT DE NEMOURS & CO., E. I. Aug. 17, 1939, No. 23775. Convention date, Aug. 17, 1938. [Class 2 (iii)] [Also in Group III] Organic acids, principally propionic, but containing adipic and other non-volatile acids, are made by the hydrogenation of propiolic acid and its salts in the presence of a hydrogenation catalyst such as nickel or cobalt. The temperature may be 50‹-80‹C. and the pressure 60-1,500 lbs. per square inch. In an example, an aqueous solution of sodium propiolate is hydrogenated in the presence of a catalyst prepared as follows :-sodium is added to a suspension of nickel chloride in a solution of naphthalene in glycol dimethyl ether, the precipitated pyrophoric nickel being washed with glycol dimethyl ether, dried, washed with water to remove sodium chloride, and partially oxidized by allowing air to come into contact with it slowly while the temperature is not allowed to rise above 25‹C. The yield of byeproducts can be increased by pretreating with a stream of oxygen a suspension of nickel in a solution of sodium propiolate at 20‹-60‹C. On subsequent hydrogenation the yield of non- volatile acids is 40-50 per cent.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US533648XA | 1938-08-17 | 1938-08-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB533648A true GB533648A (en) | 1941-02-18 |
Family
ID=21983715
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB23775/39A Expired GB533648A (en) | 1938-08-17 | 1939-08-17 | Improvements in or relating to the production of valuable organic acids |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB533648A (en) |
-
1939
- 1939-08-17 GB GB23775/39A patent/GB533648A/en not_active Expired
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