关键词: 直链不饱和脂肪酸, 催化异构, 支链化, 分离技术

Abstract: The research progress of isomerization of straight unsaturated fatty acids to branched-chain isomers is summarized, and the mechanism of the formation of branched-chain isomers, the isomerizing catalyst used such as clay and zeolite, the principle of screening for the catalyst are reviewed. All sorts of zeolite commonly used for fatty acids isomerization reaction and existing synthesis processes are discussed. Some kinds of separation technologies for fatty acids are compared, including distillation separation, solvent crystallization, urea complexation and supercritical fluid extraction. The key issue of zeolite-catalyed process of branched-chain fatty acids is to resolve the reaction selectivity problem when mixed fatty acids are used as raw materials. Related basic studies, such as more explicit reaction mechanism and effects of catalyst structure parameters on the reaction, are the future research directions.

Key words: straight unsaturated fatty acids, catalytic isomerization, branch chain, separation technology