Lubricating compositions
A lubricating composition is described comprising a major amount of oil of lubricating viscosity and a minor amount of an oil-soluble composition selected from the group consisting of: (A) an alkali metal salt of a polyalkenyl succinimide which is the reaction product of (a) a polyalkenyl succinic acid or polyalkenyl succinic anhydride, with (b) an amine selected from the group consisting of polyamines and hydroxy-substituted polyamines; and (B) a mixture comprising: (1) an oil-soluble alkali metal compound; and (2) a polyalkenyl succinimide which is the reaction product of (a) a polyalkenyl succinic acid or polyalkenyl succinic anhydride, with (b) an amine selected from the group consisting of polyamines and hydroxy-substituted polyamines; wherein the polyalkenyl succinic acid and polyalkenyl succinic anhydride are prepared by a thermal reaction, and the lubricating composition has a sufficient amount of basic nitrogen content so that the use of from 7.91 to about 50 mmoles of alkali metal/kg lubricant composition provides for reductions in the lower piston deposits as compared to the lubricant composition not containing alkali.
- Assignee:
- Chevron Research and Technology Co., San Francisco, CA (United States)
- Patent Number(s):
- A; US 5232616
- Application Number:
- PPN: US 7-570581
- OSTI ID:
- 6277590
- Country of Publication:
- United States
- Language:
- English
Similar Records
Lubricating oil with improved diesel dispersancy
Ethylene copolymer viscosity index improver dispersant additive useful in oil compositions
Related Subjects
320302* -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Materials
ALKALI METAL COMPOUNDS
AMINES
ANHYDRIDES
CARBOXYLIC ACIDS
CHEMICAL COMPOSITION
CHEMICAL REACTION YIELD
DESIGN
DICARBOXYLIC ACIDS
IMIDES
LUBRICANTS
LUBRICATING OILS
OILS
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OTHER ORGANIC COMPOUNDS
PERFORMANCE
PETROLEUM PRODUCTS
SOLUBILITY
SUCCINIC ACID
VISCOSITY
YIELDS