Carboxylate overbased gels

Details Carboxylate overbased gels Carboxylate overbased gels

C - Chemistry, Metallurgy

07

C

C07C 53/126 (2006.01) C07C 27/02 (2006.01) C07C 51/09 (2006.01) C07C 51/41 (2006.01) C07C 57/12 (2006.01) C07C 59/01 (2006.01) C10M 159/20 (2006.01) C10M 177/00 (2006.01)

Patent

CA 2259113

The present invention is directed to a process for preparing a gelled overbased calcium carboxylate which involves carbonating a carboxylic acid of 8 to 30 carbon atoms in the presence of a promoter system consisting of water and an alcohol of 1 to 8 carbon atoms, such that the mole ratio of alcohol to water is substantially constant and is such that the viscosity of the reaction mixture during carbonation step does not exceed 1 pascal second (1000 centipoise). This process prevents excessive thickening of the reaction mixture in a manufacturing unit during carbonation and affords ample time to complete the process of carbonation without premature crystallization of the calcium carbonate formed during overbasing.

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