Process of preparing metallic detergent-dispersant additives of high alkalinity in particular for lubricating oils, and product obtained thereby
US4293431A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 19, 1979 |
| Grant date | Oct 6, 1981 |
| Priority date | — |
| Expiry date | Jun 19, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10M159/24
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A process of preparing metallic detergent-dispersant compositions is provided by: PA1 1. Reacting sulfur with an alkylphenol, bearing one or more C.sub.6 -C.sub.60 alkyl substituents, in the presence of a dilution oil, an alkaline-earth metal alkylbenzene sulfonate of a molecular weight of more than about 300 and a TBN of less than or equal to about 150, an alkaline-earth metal compound, optionally an alkaline-metal hydroxide, a base component of metallic detergent-dispersant of a TBN greater than or equal to 200 selected from among superalkalinized sulfurized alkaline-earth metal alkylphenates, alkaline-earth metal alkylbenzene sulfonates, and mixtures of superalkalinized sulfurized alkaline earth metal alkylphenates and alkaline-earth metal alkylbenzene sulfonates, and an alkylene glycol, at a temperature of between 100.degree. C. and 190.degree. C.; PA1 2. Carbonating the resultant mixture with carbon dioxide at a temperature of between 100.degree. C. and 200.degree. C., the amount of CO.sub.2 being between that which can be completely absorbed and an excess of 30 percent of said amount; PA1 3. Removing the alkylene glycol; and PA1 4. Separating the metallic detergent-dispersant…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.