| 摘要 |
A process for preparing alkylsalicylate superalkalinized detergent-dispersant lubricating oil additives: (a) by the acid catalyzed neutralization of C12-C30 alkylphenol with alkaline earth base in the presence of an azeotropic solvent for the water of reaction; (b) by the carboxylation of the first product with CO2 to partially convert the alkylphenate to alkylsalicylate; and (c) by sulfurization-superalkalinization of the product in the presence of sulfur, alkaline earth base, azeotropic solvent and added CO2.
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