Process for making carboxylic acid esters
US6242620A · kind A · utility
5Cited by
2References
36Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 5, 1998 |
| Grant date | Jun 5, 2001 |
| Priority date | — |
| Expiry date | Mar 5, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C67/56
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Sulfur and soap contaminants are removed from carboxylic acid esters by a process comprising the steps of: (1) contacting a carboxylic acid ester with an aqueous base at a temperature of from about 225.degree. F. to about 280.degree. F. while removing water to form a dry, crude ester; (2) contacting the dry, crude ester with an absorbent selected from the group consisting of silica gel, hydro-silica gel and mixtures thereof; (3) separating the absorbent from the ester.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.