Process for preparing sorbitan esters
US4297290A · kind A · utility
37Cited by
5References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 17, 1980 |
| Grant date | Oct 27, 1981 |
| Priority date | — |
| Expiry date | Jul 17, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D307/20
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Sorbitan fatty acid esters are prepared by forming anhydro sorbitol (a mixture of sorbitans, isosorbide, and unreacted sorbitol) by acid-catalyzed anhydrization, then reacting the resulting anhydro sorbitol with a fatty acid in the presence of a base at a temperature not exceeding about 215.degree. C. Use of temperatures not over 215.degree. C. results in products having substantially less color than those obtained at higher temperatures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.