GB419457A - Improvements in or relating to the production of esters - Google Patents
Improvements in or relating to the production of estersInfo
- Publication number
- GB419457A GB419457A GB1398633A GB1398633A GB419457A GB 419457 A GB419457 A GB 419457A GB 1398633 A GB1398633 A GB 1398633A GB 1398633 A GB1398633 A GB 1398633A GB 419457 A GB419457 A GB 419457A
- Authority
- GB
- United Kingdom
- Prior art keywords
- added
- sulphuric acid
- cyanhydrin
- sulphate
- acid
- 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
- C07C69/00—Esters of carboxylic acids; Esters of carbonic or haloformic acids
- C07C69/52—Esters of acyclic unsaturated carboxylic acids having the esterified carboxyl group bound to an acyclic carbon atom
- C07C69/533—Monocarboxylic acid esters having only one carbon-to-carbon double bond
- C07C69/54—Acrylic acid esters; Methacrylic acid esters
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
a -Hydroxy fatty acid esters are manufactured by reacting a ketone cyanhydrin with sulphuric acid at a raised temperature not exceeding about 100 DEG C., esterifying the product by heating with an alcohol, and distilling the reaction product with the addition, either before or during the early stages of the distillation, of an anhydrous alkali metal sulphate or bisulphate or ammonium sulphate. The proportion of sulphuric acid should preferably be between 1 and 1,3 moles per mole of cyanhydrin, in which case about 25--30 per cent, on the weight of acid, of sodium sulphate should be added. The products may be employed for the manufacture of the corresponding unsaturated esters. In examples: (1) sulphuric acid is added to crude acetone cyanhydrin with stirring and cooling to 75 DEG C., after which methyl alcohol and a little hydroquinone are added and the mixture is warmed on a water bath and then distilled after adding anhydrous sodium sulphate, the distillate being fractionated to yield methyl a -hydroxyisobutyrate together with methyl methacrylate; (2) acetone cyanhydrin is added to sulphuric acid with stirring and cooling to 80 DEG C., the rest of the procedure being similar to that of (1). Specifications 405,699 and 410,208 are referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1398633A GB419457A (en) | 1933-05-13 | 1933-05-13 | Improvements in or relating to the production of esters |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1398633A GB419457A (en) | 1933-05-13 | 1933-05-13 | Improvements in or relating to the production of esters |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB419457A true GB419457A (en) | 1934-11-13 |
Family
ID=10032940
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1398633A Expired GB419457A (en) | 1933-05-13 | 1933-05-13 | Improvements in or relating to the production of esters |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB419457A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0595130A1 (en) * | 1992-10-28 | 1994-05-04 | Bayer Ag | N-phenylacetaminonitriles and their use as intermediates for the synthesis of insecticidal and herbicidal 3-aryl-pyrrolidine-2,4-diones |
-
1933
- 1933-05-13 GB GB1398633A patent/GB419457A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0595130A1 (en) * | 1992-10-28 | 1994-05-04 | Bayer Ag | N-phenylacetaminonitriles and their use as intermediates for the synthesis of insecticidal and herbicidal 3-aryl-pyrrolidine-2,4-diones |
| US5508436A (en) * | 1992-10-28 | 1996-04-16 | Bayer Aktiengesellschaft | N-phenylacetamino nitriles intermediates and process for making pyrroline-2- |
| US5672718A (en) * | 1992-10-28 | 1997-09-30 | Bayer Aktiengesellschaft | N-phenylacetamino nitriles |
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