An environmentally friendly and cost-effective two-stage catalytic method is developed for the synthesis of unsaturated esters. Naphthenic acids are prerared by catalytic oxidation of a narrow diesel fraction isolated from Balakhan oil on cobalt-containing multiwalled carbon nanotubes mixed with manganese naphthenate. Unsaturated esters are synthesized by subsequent reaction with unsaturated alcohols in the presence of the ionic liquid N-methylpyrrolidone hydrosulfate as an esterification catalyst. The prepared esters are shown to be effective corrosion inhibitors.

中文翻译：

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在离子液体中制备环烷酸不饱和酯的两步催化工艺

开发了一种环保且经济高效的两步催化合成不饱和酯的方法。环烷酸是通过在与环烷酸锰混合的含钴多壁碳纳米管上催化氧化从 Balakhan 油中分离出来的窄柴油馏分来制备的。在离子液体 N-甲基吡咯烷酮硫酸氢盐作为酯化催化剂的存在下，通过与不饱和醇的后续反应合成不饱和酯。制备的酯被证明是有效的腐蚀抑制剂。