Process for the manufacture of a grease composition
AssigneeShell Oil Company
InventorJean-Luc Pierre André Brossaud
Life of this patent
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Abstract
Processes for the manufacture of metal complex grease compositions are provided. In one embodiment, the process comprises: preparing a slurry comprising a base oil, water, a metal base and a complexing agent, wherein the weight ratio of water:solid in the slurry is in the range of from 0.15:1 to 1.5:1; applying shear to the slurry; adding a C10-C24 saturated or unsaturated fatty acid or derivative thereof to effect a saponification reaction; removing water from the saponified product; heating the saponified product at a temperature in the range of from 190 to 230° C.; and subsequently cooling the product to a temperature in the range of from 200 to 150° C. to form the metal complex grease composition.
Claims11
A process for the manufacture of a metal complex grease composition comprising the steps of:
- (i) preparing a slurry comprising a base oil, water, a metal base and a complexing agent, wherein the weight ratio of water:solid in the slurry is in the range of from 0.15:1 to 1.5:1;
- (ii) applying shear to the slurry at a shear frequency of at least 1,000,000 s−1;
- (iii) adding the slurry emerging from step (ii) to a C10-C24 saturated or unsaturated fatty acid or derivative thereof to effect a saponification reaction, the saponification reaction being carried out at a temperature of at least 80° C.;
- (iv) removing water from the saponified product resulting from step (iii);
- (v) heating the product emerging from step (iv) at a temperature in the range of from 190 to 230° C.;
- and
- (vi) cooling the product emerging from step (v) to a temperature in the range of from 200 to 150° C. to form the metal complex grease composition.
Dependencies are inferred from the claim text.