GB313234A - Manufacture of anhydrides of alkoxy aliphatic acids - Google Patents
Manufacture of anhydrides of alkoxy aliphatic acidsInfo
- Publication number
- GB313234A GB313234A GB897028A GB897028A GB313234A GB 313234 A GB313234 A GB 313234A GB 897028 A GB897028 A GB 897028A GB 897028 A GB897028 A GB 897028A GB 313234 A GB313234 A GB 313234A
- Authority
- GB
- United Kingdom
- Prior art keywords
- anhydrides
- phosgene
- reaction
- anhydride
- ethyl
- 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
- C07C51/54—Preparation of carboxylic acid anhydrides
- C07C51/56—Preparation of carboxylic acid anhydrides from organic acids, their salts, their esters or their halides, e.g. by carboxylation
Abstract
313,234. Dreyfus, H. March 24, 1928. Alkoxy aliphatic anhydrides.-Alkoxy aliphatic anhydrides or their substitution products are prepared bv bringing metallic salts of the corresponding acids or mixtures thereof into reaction with phosgene or substances' yielding phosgene, such as sulphur trioxide and carbon tetrachloride. Preferably, the anhydrous pulverulent alkali-metal salts are employed and the reaction is conducted in an inert medium, advantageously in the anhydride to be produced: the process may then be conducted continuously. When the anhydrides contain traces of sulphur, they may be purified by treatment with suitable metals or metal compounds, such as lead oxide or copper oxide, or by treatment with chlorine and a metal salt of the acid corresponding to the anhydride. In the example, dry powdered sodium methoxyacetate mixed with methoxyacetic anhydride is treated with phosgene, preferably at a temperture below 10‹ C. ; the product is distilled in vacuo when the reaction is complete. Reference is made also to the preparation of anhydrides from the ethyl and propyl ethers of glycollic acid and the methyl, ethyl and propyl ethers of lactic and hydracrylic acids. Specifications 313,233 and 313,235 are referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB897028A GB313234A (en) | 1928-03-24 | 1928-03-24 | Manufacture of anhydrides of alkoxy aliphatic acids |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB897028A GB313234A (en) | 1928-03-24 | 1928-03-24 | Manufacture of anhydrides of alkoxy aliphatic acids |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB313234A true GB313234A (en) | 1929-06-13 |
Family
ID=9862806
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB897028A Expired GB313234A (en) | 1928-03-24 | 1928-03-24 | Manufacture of anhydrides of alkoxy aliphatic acids |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB313234A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4874558A (en) * | 1987-05-21 | 1989-10-17 | Indiana University Foundation | Polymer catalyzed synthesis of acid anhydrides |
-
1928
- 1928-03-24 GB GB897028A patent/GB313234A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4874558A (en) * | 1987-05-21 | 1989-10-17 | Indiana University Foundation | Polymer catalyzed synthesis of acid anhydrides |
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