自催化水解反应精馏制草酸工艺  

The process of auto-catalytic hydrolysisreaction distillation for preparing oxalic acid

作　　者：徐艳[1] 许根慧[1] 张毅民[1] 

机构地区：[1]天津大学化工学院碳一国家重点实验室,天津300072

出　　处：《化学工程》2004年第3期71-73,78,共4页Chemical Engineering(China)

基　　金：国家"九五"科技攻关项目(96 539 01)

摘　　要：开发了草酸二乙酯水解反应精馏技术制备草酸的工艺过程,研究了塔顶出料量、进料配比、回流比及进料位置等工艺条件对草酸二乙酯转化率的影响,确定较好工艺条件:塔顶采出率0.17—0.20、进料摩尔比:18—24、回流比2—3,草酸二乙酯的转化率可达到97%以上。The process of reaction distillation for preparing oxalic acid by hydrolysis of diethyl oxalate was developed.The effects of operating conditions,such as the top effluent ratio,molar ratio in feed streams,reflux ratio,and feed steams position were investigated respectively.When the top effluent ratio is 0.17-0.20,the molar ratio in feed streams is 18-24,the reflux ration is 2-3,the conversion of diethyl oxalate reaches more than 97%.

关 键 词：草酸二乙酯 草酸 水解 反应精馏 

分 类 号：TQ22[化学工程—有机化工]