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前言对苯二甲酸是合成聚酯纤維及薄膜的重要工业原料,目前其工业生产方法有二:或者从对二甲苯为出发原料,經氧化而得;或者从邻苯二甲酸酐为出发原料,經羧基轉位(Henkel法)而得。这是近几年来才发现的最新方法,它比前者操作簡单,成本低,产率高。产品鈍度高。故各国都十分重視,但尚未工业化。对蘊藏煤十分丰富的我国,考虑从炼焦工业获得大量的萘,經氧化所得的邻苯二甲酸酐作为原料,是十分有利的。故我們选择后者进行研究。
Introduction Terephthalic acid is an important industrial raw material for the synthesis of polyester fibers and films. At present, there are two industrial production methods: from para-xylene as the starting material and oxidation, or from phthalic anhydride as the starting material, The carboxyl translocation (Henkel method) derived. This is the latest method discovered in recent years, which is simple, low cost and high yield. High product dullness Therefore, all countries attach great importance to it, but have not yet industrialized. In our country, rich in coal deposits, it is very favorable to consider the large amount of naphthalene obtained from the coking industry and the phthalic anhydride obtained by oxidation as raw materials. So we choose the latter to study.