Process for the preparation of detergent dispersants of high alkalinity for lubricating oils and the product obtained therefrom
Patent
·
OSTI ID:5996865
A process is provided for preparing detergent-dispersant compositions of a tbn of at least about 200, containing at least about 2 percent magnesium, by: (1) sulfurization by sulfur of an alkylphenol in the presence of a magnesium and/or calcium alkylbenzene-sulfonate of a tbn less than or equal to about 150, an alkaline-earth component selected from among lime, mixtures of magnesium oxide and lime, or a magnesium oxide and alkali hydroxide, and an alkylene glycol; (2) optionally precarbonation of the resultant mixture by means of CO/sub 2/; (3) super-alkalinization and carbonation of the resultant mixture by means of magnesium oxide and possibly lime, CO/sub 2/ and alkylene glycol; and (4) removal of the excess alkylene glycol. The detergent-dispersant compositions obtained are useful in the improvement of the detergent-dispersant properties of lubricating oils.
- Assignee:
- Orogil (France)
- Patent Number(s):
- US 4302342
- OSTI ID:
- 5996865
- Country of Publication:
- United States
- Language:
- English
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