Overbased alkali metal additives
US4839094A · kind A · utility
2Cited by
20References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 24, 1987 |
| Grant date | Jun 13, 1989 |
| Priority date | — |
| Expiry date | Aug 24, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10M159/24
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A process for making an oil solution of a highly basic alkali metal compound which comprises PA1 (a) heating alkali metal hydroxide with an alkoxyalkanol and a solvent to remove water as an azeotrope with alkoxyalkanol and said solvent; PA1 (b) adding to the mixture surfactant; PA1 (c) thereafter introducing carbon dioxide into the reaction mixture so as to react with the basic compounds therein; PA1 (d) hydrolysing the reaction mixture; and PA1 (e) removing solvent by distillation, base oil being added to the process during one of steps (b), (c), (d) and (e) so that the desired product is obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.