液相空气氧化法合成单氯代苯酐的工业试验  

Method for Industrial Synthesis of Monochlorophthalic Anhydride

作　　者：吕宏飞[1] 张春荣[1] 张惠[1] 梁泰硕[1] 刘文彬 

机构地区：[1]黑龙江省石油化学研究院,哈尔滨150040 [2]哈尔滨工程大学化学工程系,哈尔滨150001

出　　处：《化工进展》2003年第4期401-403,共3页Chemical Industry and Engineering Progress

摘　　要：报道以邻二甲苯为原料 ,采用液相空气氧化法制备单氯代苯酐工艺。邻二甲苯在三氯化铁催化下和氯气反应得氯代混合物 ,从氯代产物精馏分离出质量分数超过 99%的 3-氯代邻二甲苯和 4 -氯代邻二甲苯混合物。得到的单氯代邻二甲苯以乙酸为溶剂、在 14 0～ 30 0℃、 0 8～ 3 0MPa条件下 ,以钴锰溴体系为催化剂进行液相氧化 ,得单氯代邻苯二甲酸 ,然后脱水成酐 ,得单氯代苯酐混合物 ,精馏分离后得 3-氯代苯酐和 4 -氯代苯酐。单程总收率不低于 75 %。Synthesis methods for monochlorophthalic anhydride,particularly the process for manufacture of monochlorophthalic anhydride by liquid phase oxidation are reviewed in this paper. o -xylene acting as the starting raw material is chlorinated firstly by chlorine,and by rectification.The content of monochloro- o -xylene can reach 99% by weight.After oxidization in acetic acid solvent in presence of Co,Mn,Br catalysts under 140～300?℃and 0 8～3 0?MPa pressure monochlorophthalic acid is formed.By dehydration and distillation of the acid,4-chlorophthalic anhydride and 3-chlorophthalic anhydride with yield more than 75% are obtained.

关 键 词：液相空气氧化法 合成 氯代苯酐 工业试验 邻二甲苯 氯化 

分 类 号：TQ245.3[化学工程—有机化工]