The present invention relates to a process for preparing 2,4-dichloro-5-hydroxyacetanilide by reacting 3-hydroxyacetanilide with sulfuryl chloride in the presence of from 3 to 30 parts by weight of an aliphatic carboxylic acid having from 1 to 6 carbon atoms per part by weight of 3-hydroxyacetanilide with vigorous mixing at from 20 to 100° , removing gaseous components from the reaction mixture, setting a ratio of from 1.0 to 6 parts by weight of aliphatic carboxylic acid per part by weight of 3-hydroxyacetanilide employed and removing 2,4-dichloro-5-hydroxyacetanilide as a solid.
本发明涉及一种制备2,4-二
氯-5-羟基
乙酰苯胺的方法,通过在存在3至30份重量的具有1至6个碳原子的脂肪族
羧酸与3-羟基
乙酰苯胺的每份重量反应,与亚
硫酰氯在20至100°下进行剧烈混合,从反应混合物中除去气态成分,设定每份重量的3-羟基
乙酰苯胺所用的脂肪族
羧酸的重量比为1.0至6,将2,4-二
氯-5-羟基
乙酰苯胺作为固体除去。