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AssigneesCosmo Oil Co., Ltd., Cosmo Research Institute
InventorsTakashi Hori, Sanae Ueda, Yoshihiro Kojima, Masato Goto, Hitoshi Kumagai
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A process for producing an over-based sulfurized alkaline earth metal phenate type detergent, which comprises reacting a phenol and a dihydric alcohol with an alkaline earth metal reagent to carry out a metal addition reaction, and reacting sulfur therewith to carry out a sulfurization reaction, and then reacting carbon dioxide therewith to carry out a carbon dioxide treatment, characterized in that the metal addition reaction and the sulfurization reaction are carried out under pressure and closed conditions. The sulfurization reaction may be carried out simultaneously with the metal addition reaction, or, alternatively, with the carbon dioxide treatment after the metal addition reaction. Furthermore, the sulfurization reaction may be carried out between the metal addition reaction and the carbon dioxide treatment.
A process for producing an over-based sulfurized alkaline earth phenate type detergent, which comprises reacting a phenol and a dihydric alcohol with an alkaline earth metal reagent which is an alkaline earth metal oxide or hydroxide to carry out an addition reaction of the alkaline earth metal provided by the alkaline earth metal reagent to the phenol in a reaction system, reacting sulfur therewith to carry out a sulfurization reaction and then reacting carbon dioxide therewith to carry out a carbon dioxide treatment, wherein said metal addition reaction and said sulfurization reaction are carried out under pressure and closed conditions without allowing gaseous material to escape from the reaction system during said metal addition reaction and said sulfurization reaction.
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