Organotin catalyzed transesterification
US5606103A · kind A · utility
10Cited by
20References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 28, 1995 |
| Grant date | Feb 25, 1997 |
| Priority date | — |
| Expiry date | Dec 28, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C2602/42
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Methyl or ethyl esters of mono- and polycarboxylic acids are transesterified with alcohols and polyols by reaction in the presence of a catalytically effective amount of organotin catalyst, so that an alcohol or polyol carboxylic acid ester is formed, which is then washed with aqueous alkali having a pH bigger than about 13.2 so as to remove essentially all of the organotin catalyst, thereby permitting the recovery of the alcohol or polyol carboxylic acid ester essentially free of the organotin catalyst.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.