Process for preparing overbased sulfurized phenates

Details Process for preparing overbased sulfurized phenates Process for preparing overbased sulfurized phenates

C - Chemistry, Metallurgy

10

M

253/86, 260/615.

C10M 159/22 (2006.01) C07C 149/36 (1985.01)

Patent

CA 1234155

ABSTRACT OF THE DISCLOSURE Overbased sulfurized phenates formed by the process comprising contacting at reaction conditions a composi- tion comprising a phenolic compound, sulfur and an alka- line earth metal base selected from the group consisting of calcium, barium, magnesium, and strontium, in an amount insufficient to fully react with the phenolic com- pound, and contacting the above intermediate composition with an additional amount of alkaline earth metal base and carbon dioxide, wherein the molar ratio of carbon dioxide absorbed to overbasing alkaline earth metal is from about 0.70 to about 0.95.

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