GB544651A - - Google Patents
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- Publication number
- GB544651A GB544651A GB544651DA GB544651A GB 544651 A GB544651 A GB 544651A GB 544651D A GB544651D A GB 544651DA GB 544651 A GB544651 A GB 544651A
- Authority
- GB
- United Kingdom
- Prior art keywords
- mercaptol
- acid
- acids
- alcohol
- ketone
- 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.)
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
544,651. Ketals. DU PONT DE NEMOURS & CO., .E. 1., and MOCHEL, W. E. Oct. 18, 1940, No. 15427. [Class 2 (iii)] Ketals are formed by reacting a mercaptol with an alcohol in the presence of an acid interchange catalyst. The mercaptol is prepared for instance by reacting a ketone with a mercaptan. In examples, 2-2 bis-(ethylthio) butane the mercaptol made from methyl-ethyl ketone and ethyl mercaptan, is reacted with methyl alcohol and the mercaptol from methylethyl ketone and cyclohexane thiol is re-acted with methyl alcohol. Suitable catalysts are hydrochloric, p-toluene sulphonic, acids of sulphur, phosphorus and chlorine, boron trifluoride and its complexes, strong organic acids such as aromatic and aliphatic sulphonic acids, and chloracetic acid, acid-acting salts such as tin and aluminium chlorides, and heteropoly acids containing an oxide of phosphorus, silicon, boron or arsenic together with other groups such as oxides of tungsten, vanadium, chromium, molybdenum, tellurium and sulphur. An unsaturated ether such as 2-methoxy-butene-1 may appear as a byproduct, formed by loss of a molecule of alcohol from the ketal. This reaction can be effected by heating the ketal with an acid catalyst, the reaction being reversible.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB544651A true GB544651A (en) |
Family
ID=1748493
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB544651D Active GB544651A (en) |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB544651A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2522669A (en) * | 1947-05-21 | 1950-09-19 | Socony Vacuum Oil Co Inc | Synthetic lubricants from normal aliphatic mercaptans and aliphatic ketones |
| US4694106A (en) * | 1985-08-23 | 1987-09-15 | International Flavors & Fragrances Inc. | Methylthioionene derivatives and use thereof in augmenting or enhancing the aroma or taste of foodstuffs |
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0
- GB GB544651D patent/GB544651A/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2522669A (en) * | 1947-05-21 | 1950-09-19 | Socony Vacuum Oil Co Inc | Synthetic lubricants from normal aliphatic mercaptans and aliphatic ketones |
| US4694106A (en) * | 1985-08-23 | 1987-09-15 | International Flavors & Fragrances Inc. | Methylthioionene derivatives and use thereof in augmenting or enhancing the aroma or taste of foodstuffs |
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