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自六十年代以来羧酸类由于价廉,资源丰富,并能萃取很多金属,因而已发展成为一类工业萃取剂。随着我国石油化工的发展,环烷酸的产量增加很快。为适应我国水冶工业迅速发展大好形势,国内在应用环烷酸作为各种金属萃取剂的研究工作大力开展。环烷酸作为工业萃取剂尚有两点不足之处,①环烷酸是一类有机弱酸,在微酸性介质萃取金属容易出现乳化现象,②环烷酸与金属生成络合物,油溶性小,容易析出。近年稀土工业蓬勃发展,要求
Carboxylic acids have been developed into a class of industrial extraction agents since the 1960s due to their low cost, abundant resources and their ability to extract many metals. With the development of China’s petrochemical industry, naphthenic acid production increased rapidly. In order to meet the rapid development of China’s hydrometallurgical industry, the domestic situation in the application of naphthenic acid as a variety of metal extractant research work vigorously. Naphthenic acid as an industrial extractant there are two deficiencies, ① naphthenic acid is a class of organic weak acid, the metal in a slightly acidic medium prone to emulsification, ② naphthenic acid and metal complexes, oil-soluble small , Easy to precipitate. Rare earth industry in recent years, the rapid development of the requirements