氯甲苯是一种重要的精细有机化工原料，它是透明液体；用于医药、农药、染料等。是甲苯液相氯化后的主要产物，通过侧链和环上反应，可以制备出许多重要的精细化学品和中间体，氯甲苯工业化合成主要有两种方法: 一是以甲苯为原料的直接氯化法,二是以甲苯衍生物为原料的间接法，甲苯氯化有两种异构体,目前其研发重点一是异构体的调比技术,二是异构体的分离技术。目前国内外工业上主要采用甲苯液相氯化反应来生产对氯甲苯、邻氯甲苯氯甲苯生产可以用金属氯化物催化法和分子筛吸附分离法，金氯化物催化法因为污染较为严重在工业化装置上受到限制，分子筛吸附分离法效果好无污染随着科学的进步分子筛吸附分离法将是工业生产中唯一的选择
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The chlorine methyl benzene is a kind of important fine and organic chemical engineering raw material and it is a transparent liquid;Used for medicine, agrochemical, dyestuff...etc..After being a methyl benzene liquid mutually a chlorination of staple, pass side chain and wreath to up respond, can make the fine chemicals of a much importance and in the center body, the chlorine methyl benzene industrialization synthesizes to mainly have two kinds of methods: While taking methyl benzene as the direct chlorination method of raw material, two is to take methyl benzene derivatives as the indirect method of raw material, the methyl benzene chlorination contains two kinds of different constructions, currently once its development point be the adjust of different construction ratio technique, two is the separation technique of different construction.Industry at home and abroad mainly in liquid phase chlorination of toluene to produce p-chlorotoluene, o-chlorotoluene chlorotoluene production can be catalyzed by metal chloride and molecular sieve adsorption separation, gold chloride catalysis because the pollution is more serious in the industrial device is limited, the effect of molecular sieve adsorption good clean separation science with molecular sieve adsorption separation of industrial production will be the only option.
