Sulfurized compositions
US4191659A · kind A · utility
68Cited by
3References
45Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 6, 1978 |
| Grant date | Mar 4, 1980 |
| Priority date | — |
| Expiry date | Oct 6, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/582
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Sulfurized compositions are prepared by the reaction, under superatmospheric pressure, of olefinic compounds with a mixture of sulfur and hydrogen sulfide in the presence of an acidic, basic or neutral catalyst, followed by removal of low boiling materials including unreacted olefin, mercaptan and monosulfide. An optional final step is removal of active sulfur; for example, by treatment with an alkali metal sulfide. The resulting sulfurized compositions are useful as lubricant additives.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.