One-step synthesis of c-caprolactam via the liquid phase catalytic nitrosation of cyclohexane in the presence of concentrated sulfuric acid  

作　　者：Kuiyi YOU Fangfang ZHAO Xueyan LONG Pingle LIU Qiuhong AI Hean LUO 

机构地区：[1]School of Chemical Engineering,Xiangtan University,Xiangtan 411105,China

出　　处：《Frontiers of Chemical Science and Engineering》2012年第4期389-394,共6页化学科学与工程前沿（英文版）

摘　　要：A simple and efficient approach for the synthesis of e-caprolactam via the liquid phase nitrosation of cyclohexane and nitrosyl sulfuric acid in the presence of concentrated sulfuric acid has been developed. A series of novel A1VPO composites were prepared by an impregnation method and the composites were then employed to catalyze the nitrosation reaction of cyclohexane and nitrosyl sulfuric acid. Compared to the reaction using fuming sulfuric acid, the selectivity for the desired product was significantly improved using this one-step catalytic process. This method affords a shortcut to prepare ecaprolactam and its analogs from cyclohexane.A simple and efficient approach for the synthesis of e-caprolactam via the liquid phase nitrosation of cyclohexane and nitrosyl sulfuric acid in the presence of concentrated sulfuric acid has been developed. A series of novel A1VPO composites were prepared by an impregnation method and the composites were then employed to catalyze the nitrosation reaction of cyclohexane and nitrosyl sulfuric acid. Compared to the reaction using fuming sulfuric acid, the selectivity for the desired product was significantly improved using this one-step catalytic process. This method affords a shortcut to prepare ecaprolactam and its analogs from cyclohexane.

关 键 词：CYCLOHEXANE e-caprolactam A1VPO compo-site catalysts one-step synthesis concentrated sulfuric acid 

分 类 号：TQ223.121[化学工程—有机化工] O621.3[理学—有机化学]