A method for the preparation of acyloxyphthalic anhydride or oxydiphthalic anhydride which comprises the reaction of a halophthalic anhydride with an alkali metal salt and at least a catalytically effective amount of an acid or acid derivative selected from the group consisting of benzoic acids, substituted benzoic acids, benzoic acid salts or substituted benzoic acid salts, and hydrolyzable benzoyl esters, and hydrolyzable substituted benzoyl esters, alkyl carboxylic acids, hydrolyzable esters of alkyl carboxylic acids, and salts of alkyl carboxylic acids. The process may be conducted without solvent, in a polar solvent or in a non-polar solvent using a phase transfer catalyst.
一种制备酰氧基
邻苯二甲酸酐或氧基二苯二
甲酸酐的方法,包括卤代
邻苯二甲酸酐与碱
金属盐和至少催化有效量的酸或酸衍
生物的反应,这些酸或酸衍
生物选自由
苯甲酸组成的组、取代
苯甲酸、
苯甲酸盐或取代
苯甲酸盐、可
水解苯甲酰酯、可
水解取代苯甲酰酯、烷基
羧酸、烷基
羧酸可
水解酯和烷基
羧酸盐。该工艺可在无溶剂、极性溶剂或使用相转移催化剂的非极性溶剂中进行。