Method of preparing overbased calcium sulfonates
US5132033A · kind A · utility
5Cited by
2References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 1, 1990 |
| Grant date | Jul 21, 1992 |
| Priority date | — |
| Expiry date | Nov 1, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10M159/24
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Lubricating oils contain an overbased oil-soluble composition prepared by adding water to a heated reaction mixture containing an alkaline earth metal halide, an alkaline earth metal salt of an alkaryl sulfonate, a hydrocarbon diluent-solvent, a lower alkanol, and an alkali metal oxide, and thereafter passing carbon dioxide through the reaction mixture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.