对甲苯甲腈合成工艺改进  

An Improved Technology for Preparing p-Tolunitrile

作　　者：易兵 汤正平 林原斌[2] 

机构地区：[1]湘潭机电高等专科学校,湘潭411101 [2]湘潭大学化学化工学院,湘潭411105

出　　处：《染料工业》2001年第3期37-38,共2页Dyestuff Industry

摘　　要：本文报道了对甲苯甲酸与尿素反应,进行直接氰化将羧基转变成氰基生成对甲苯甲腈的情况,改进了对甲苯甲酸直接氰化的工艺条件。当对甲苯甲酸与尿素的摩尔比为1:1.6,采用分段保温的加热方式,产品收率达75.6％。对未反应完全的原料、中间体及反应中使用的溶剂进行了回收和循环利用。By direct cyanidation, the reaction of p-toluic acid with urea would convert the carboxyl group to cyano group to give p - tolunitrile. The improved conditions were: mol ratio of p - toluic acid to urea was 1:16, employing a sectional heating and temperature maintenance technique. The yield was 75. 6% . The unreacted raw materials, intermediate products and solvent could be recovered and recycled. No severe environmental pollution problem encountered.

关 键 词：对甲苯甲酸 尿素 氰化 对甲苯甲腈 工艺 合成 

分 类 号：TQ246[化学工程—有机化工]