Methods for preparing normal and overbased phenates
US5677270A · kind A · utility
6Cited by
8References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 14, 1996 |
| Grant date | Oct 14, 1997 |
| Priority date | — |
| Expiry date | May 14, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2040/28
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Processes for preparing normal and overbased metal sulfurized alkylphenates. The processes am characterized by a sulfurization reaction using a lower carboxylic acid catalyst which does not use a polyol promoter, e.g., ethylene glycol. The process affords a metal sulfurized phenate product which is essentially free of polyol oxidation products. The products are useful as additives for lubricating oils.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.