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US 11,999,922 B2Granted
Lubricant composition containing a detergent derived from cashew nut shell liquid
AssigneeThe Lubrizol Corporation
InventorsHyungsoo Kim, James D. Burrington, Nathan J. Bartlett, Gary M. Walker, John-Louis DiFlavio
Life of this patent
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Abstract
The present invention relates to a lubricating composition comprising a detergent additive derived from raw cashew nut shell liquid. The invention also provides a process for preparing the additive and the use of the lubricating composition in a mechanical device.
Claims31
A detergent comprising the reaction product of:
- (a) a mixture of about 25% to 80% by weight of anacardic acid, cardol, and cardanol;
- (b) a metal oxide or hydrated equivalent, selected from Magnesium Oxide, Calcium Oxide, or mixtures thereof or metal hydroxide, selected from Magnesium Hydroxide, Calcium Hydroxide, or mixtures thereof;
- (c) carbon dioxide
- wherein the detergent comprises a blend of detergents comprising a metal salt of a salicyclic acid substituted at the 6 position with a hydrocarbyl group, a metal salt of an alkylsalicyclic acid substituted at the 3 or 5 position with a hydrocarbyl group, wherein the detergent has a total base number of 120 to 600 mgKOH.
1 more element
A process for preparing an alkaline earth metal salt of a salicylic acid substituted at the 6 position with a hydrocarbyl group comprising:
- reacting, at a temperature of 70° C. or less, a mixture containing raw cashew nut shell liquid and an alkaline earth metal oxide or alkaline earth metal hydroxide.
A lubricant composition comprising:
- (a) an oil of lubricating viscosity;
- (b) an alkaline earth metal salt of a salicylic acid substituted at the 6 position with a hydrocarbyl group, an overbased metal salt of a salicylic acid substituted at the 6 position with a hydrocarbyl group, or combinations thereof wherein the salicylic acid substituted at the 6 position with a hydrocarbyl group is anacardic acid derived from raw cashew nut shell liquid.
Dependencies are inferred from the claim text.