Overbased alkaline earth metal alkylhydroxybenzoates having...

Details Overbased alkaline earth metal alkylhydroxybenzoates having... Overbased alkaline earth metal alkylhydroxybenzoates having...

C - Chemistry, Metallurgy

10

M

C10M 159/22 (2006.01) C07C 67/62 (2006.01) C07C 69/84 (2006.01) C10M 129/54 (2006.01)

Patent

CA 2551978

A process for preparing an overbased alkaline earth metal alkylhydroxybenzoate, said process comprising overbasing an alkaline earth metal alkylhydroxybenzoate or a mixture of alkaline earth metal alkylhydroxybenzoate and up to 50 mole % of alkylphenol, based on the total mixture of alkylhydroxybenzoate and alkylphenol, with a molar excess of alkaline earth metal base and at least one acidic overbasing material in the presence of at least one carboxylic acid having from one to four carbon atoms and a solvent selected from the group consisting of aromatic hydrocarbons, aliphatic hydrocarbons, monoalcohols, and mixtures thereof.

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