混合萃取在甲苯法制备己内酰胺工业中的研究及应用  

Studies on mixed extraction in caprolactam synthesis from toluene

作　　者：赵承军[1] 

机构地区：[1]石家庄化纤有限责任公司技术处,河北石家庄050032

出　　处：《计算机与应用化学》2010年第2期271-276,共6页Computers and Applied Chemistry

摘　　要：本文针对甲苯法制备己内酰胺精制过程中存在的甲苯萃取选择性低、易乳化、能耗高和产品质量差等问题及己内酰胺装置扩容改造的需求,通过对苯、甲苯、环己烷、乙酸丁酯、正庚烷、正辛烷、正辛醇等7种有机溶剂的萃取性能测试,开发出了1种萃取新工艺——即用苯/环己烷混合溶剂代替甲苯萃取剂。该萃取新工艺投用后不仅使甲苯法制己内酰胺萃取能力提高了81%,满足了石家庄化纤有限责任公司己内酰胺16万吨/年扩容改造的需求,而且使己内酰胺的萃取质量大幅提高,能耗、物耗显著降低。This work is focused on the improvement of low selectivity of toluene extraction, easy emulsification, high energy consumption, product quality problem and scale-up and transformation of caprolactam plant. Based on laboratory-scale extraction experiments using benzene, toluene, cyclohexane, n-heptane, ethyl acetate and n-octanol as extraction solvents, this work developed a new process for the continous extraction of caprolactam from crude lactam with benzene and cyclohexane as a mixed-solvent instead of benzene as a solvent. This process increases the extraction capacity by 81%, and can meet the scale-up and transformation to 16 kt/a yield demand with less production and energy cost and high extraction quality.

关 键 词：己内酰胺 混合萃取 甲苯法工艺 

分 类 号：TQ015.9[化学工程] O6-39[理学—化学]