Process for the preparation of superalkalinized metallic detergent-dispersants for lubricating oils and products obtained therefrom
US4412927A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 19, 1982 |
| Grant date | Nov 1, 1983 |
| Priority date | — |
| Expiry date | Feb 19, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10M159/24
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A process is provided for preparing detergent-dispersant compositions of high alkalinity by: PA0 1. Carbonation, at a temperature of between about 100.degree. C. and 250.degree. C., with carbon dioxide of a reaction medium comprising a sulfurized alkylphenate of an alkaline-earth metal having a TBN of between about 1 and 170, an alkaline-earth metal alkylbenzene sulfonate having a molecular weight of more than about 300 and a TBN of less than or equal to about 150, an alkaline-earth metal compound, an alkylene glycol, and a dilution oil; PA0 2. Removal of the alkylene glycol; and PA0 3. Separation of the superalkalinized metallic detergent-dispersant thus obtained. The metallic detergent-dispersant compositions obtained are useful in improving the detergent-dispersant power of lubricating oils.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.