Overbased alkali metal alkylhydroxybenzoates having low...

Details Overbased alkali metal alkylhydroxybenzoates having low... Overbased alkali metal alkylhydroxybenzoates having low...

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 2552274

A process for preparing an overbased alkali metal alkylhydroxybenzoate, said process comprising overbasing an alkali metal alkylhydroxybenzoate or a mixture of alkali 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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