GB601802A - Improvements in the preparation of acetylbutyrolactone - Google Patents
Improvements in the preparation of acetylbutyrolactoneInfo
- Publication number
- GB601802A GB601802A GB33183/45A GB3318345A GB601802A GB 601802 A GB601802 A GB 601802A GB 33183/45 A GB33183/45 A GB 33183/45A GB 3318345 A GB3318345 A GB 3318345A GB 601802 A GB601802 A GB 601802A
- Authority
- GB
- United Kingdom
- Prior art keywords
- ethylene oxide
- acetylbutyrolactone
- ethyl acetoacetate
- temperature
- aqueous 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
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Acetylbutyrolactone is prepared by reacting ethylene oxide with ethyl acetoacetate in an aqueous solution of an alkali metal hydroxide, maintaining the temperature during the reaction at not higher than 0 DEG C. In an example, ethyl alcohol is added to an aqueous solution of sodium hydroxide and after cooling to -5 DEG C., a mixture of ethylene oxide and ethyl acetoacetate previously cooled to 0 DEG C. is added, the temperature being not allowed to rise above 0 DEG C. The temperature is then maintained at 0 DEG to -5 DEG C. and after neutralizing the mixture with glacial acetic acid, the acetylbutyrolactone is obtained by extracting with benzol and fractionating the extract. The Specification as open to inspection under Sect. 91 refers to reacting the ethylene oxide with ethyl acetoacetate under alkaline conditions. This subject-matter does not appear in the Specification as accepted.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US601802XA | 1945-02-17 | 1945-02-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB601802A true GB601802A (en) | 1948-05-12 |
Family
ID=22027874
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB33183/45A Expired GB601802A (en) | 1945-02-17 | 1945-12-07 | Improvements in the preparation of acetylbutyrolactone |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB601802A (en) |
-
1945
- 1945-12-07 GB GB33183/45A patent/GB601802A/en not_active Expired
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB601802A (en) | Improvements in the preparation of acetylbutyrolactone | |
GB733650A (en) | Isophorone and its homologues | |
GB624568A (en) | Process for the manufacture of thioglycollic acid or its salts | |
US2431911A (en) | Amido naphthol ethers | |
GB568850A (en) | Guanidine derivatives | |
GB620733A (en) | Improvements in and relating to carbazole derivatives | |
GB670702A (en) | Improvements in or relating to the preparation of mercapto-carboxylic acids and salts and amides thereof | |
GB599365A (en) | Improvements in the production of substituted butanols | |
GB605973A (en) | Improvements in methods for the production of salts of chlorethane sulphonic acid | |
GB453789A (en) | A process of synthetically preparing ª‰(10)-oxycamphor | |
GB631191A (en) | Process of preparing oxazolene compounds | |
GB613648A (en) | Manufacture of organic silicon compounds | |
GB593021A (en) | Sulphonyl derivatives of melamine and processes for their production | |
GB569157A (en) | Sulphanilamide derivatives | |
GB701414A (en) | Improvements in the production of chondroitin polysulphuric acid esters | |
GB684616A (en) | 4-aminosalicylaldehyde derivatives and the manufacture thereof | |
GB594624A (en) | Process for the preparation of benzyl alcohols substituted by a dialkylaminomethyl group and, if desired, an alkoxy group | |
GB667107A (en) | Improvements in or relating to the preparation of a new unsaturated carbinol | |
NL85384C (en) | ||
GB578082A (en) | Process for the preparation of alkoxy-isobutyric acids | |
GB611081A (en) | Improvements in or relating to the production of alkali cellulose | |
GB654484A (en) | Manufacture of basic esters of 4-amino- and 4-alkylamino 3-alkoxybenzoic acids | |
GB669568A (en) | Improvements in or relating to the preparation of a derivative of cyclohexene | |
GB632801A (en) | Process for the production of a derivative of benzotetronic acid | |
GB585299A (en) | Improvements in or relating to the manufacture of aldol |