Preparation of lithium-calcium grease compositions

Details Preparation of lithium-calcium grease compositions Preparation of lithium-calcium grease compositions

C - Chemistry, Metallurgy

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C10M 129/38 (2006.01) C10M 117/02 (2006.01) C10M 117/04 (2006.01) C10M 159/08 (2006.01) C10M 177/00 (2006.01)

Patent

CA 2038759

T 7136 FF ABSTRACT PREPARATION OF LITHIUM CALCIUM GREASE COMPOSITIONS The invention provides a process for the preparation of a lubricating grease which comprises (a) dispersing in a major amount of a lubricating oil at a temperature in the range 180 to 200°F (82 to 93°C) an effective amount of a saponifiable fatty material and lithium base to neutralize the fatty material, (b) then heating the resulting mixture from (a) a temperature in the range 385 to 410°F (196 to 210°C) at ambient pressure to dissolve said fatty material, (c) homogenizing the resulting mixture from (b) a pressure in the range 80 to 200 psi (552 x 103 to 1379 kx 103 Pa) while maintaining the temperature, (d) cooling the resulting mixture to a temperature below 370°F (188°C) (e) adding calcium base to the resulting mixture to saponify the remaining (unsaponified) fatty material at a temperature in the range 290 to 360°F (143 to 182°C) and ambient pressure, and (f) homogenizing the resulting mixture at a pressure in the range 100 to 150 psi (689 x 103 to 1034 x 103 Pa) while maintaining the temperature to obtain a lubricating grease composition. PS18017

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