Process for the preparation of oxydiphthalic anhydride and acyloxyphthalic anhydrides
申请人:OCCIDENTAL CHEMICAL CORPORATION
公开号:EP0460687A2
公开(公告)日:1991-12-11
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。