Lubricant composition containing sulfurized olefin extreme pressure additive
US4204969A · kind A · utility
34Cited by
6References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 10, 1978 |
| Grant date | May 27, 1980 |
| Priority date | — |
| Expiry date | Oct 10, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2010/04
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An additive for improving extreme pressure properties of lubricating oil is made by reacting sulfur monochloride with a monoolefin (e.g. isobutene) in the presence of a promoter amount of a lower alkanol (e.g. methanol) to form an adduct, reacting the adduct with sulfur and sodium sulfide in an aqueous alkanol made at a ratio of 0.1-0.4 gram atom of sulfur per gram mole of sodium sulfide and then recovering the reaction product.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.