The new technics of producing p-tolunitrile by using p-tolunic acid,p-tolunitrile solvent and liquid ammonia through two dehydrating steps were researched.

• 本文研究了对甲基苯甲酸在对甲基苯甲腈溶剂作用下；与液氨反应；两步脱水成腈的新工艺；收率达94.；05%25；且产品纯度好；反应全过程安全、清洁、环保。