Process for sulfurizing unsaturated fatty substances by elementary sulfur in the presence of amino compounds
US6054418A · kind A · utility
2Cited by
8References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 18, 1997 |
| Grant date | Apr 25, 2000 |
| Priority date | — |
| Expiry date | Mar 18, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/582
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A process for sulfurizing a composition of unsaturated fatty ester is described in which said composition is reacted with elemental sulfur in the presence of a promoter that consists of at least one compound with an amine group and in the presence of water. When the sulfur-containing product is separated from an aqueous phase that contains the compound with an amine group, the latter can be reused for several successive sulfurations without substantial loss of activity of the promoter. The compositions of unsaturated fatty esters can be used as additives for lubricating oils or fats.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.