第 38 卷第 2 期 | | Vol. 38 No. 2 | 2008 年 4 月 | Apr 2008 |
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所属栏目:功能材料
离子交换树脂催化合成二苯甲烷二氨基甲酸酯的研究 |
何国锋,王贺玲,朱银生,田恒水
(华东理工大学 化工学院,上海 200237) |
摘 要:二苯甲烷二氨基甲酸酯是非光气合成二苯甲烷二异氰酸酯(MDI)的重要中间体。以离子交换树脂为催化剂,对苯氨基甲酸甲酯与甲醛缩合反应制备二氨基甲酸酯进行了研究,考察了催化剂、反应温度、原料配比、催化剂用量和反应时间对反应的影响。优惠条件:温度100℃,原料配比n(对苯氨基甲酸甲酯) ∶ n(甲醛)=6 ∶ 1,催化剂用量为苯氨基甲酸甲酯质量的10%,反应时间4 h。此条件下,二氨基甲酸酯收率为57%,选择性为60%。 |
关键词:苯氨基甲酸甲酯;二苯甲烷二氨基甲酸甲酯;离子交换树脂;缩合反应 |
中图分类号:TQ032.41 文献标识码:A 文章编号:1009-9212(2008)02- 0067-03 |
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Study on the Catalytic Synthesis of Methylene Diphenyl Dicarbamate with Ion-exchange Resin Catalyst |
HE Guo-feng,WANG He-ling,ZHU Yin-sheng,TIAN Heng-shui
(School of Chemical Engineering,East China University of Science and Technology,Shanghai 200237,China) |
Abstract:The synthesis of methylene diphenyl dicarbamate(MDC)from methyl phenyl carbamate(MPC)and formaldehyde was studied using Ion-exchange resin as catalyst. The main effect factors such as:catalyst,reaction temperature,ratio of materials,catalyst content and reaction time were investigated. The optimized reaction conditions were as follows:100℃,n(MPC) ∶ n(HCHO)=6 ∶ 1,m(catalyst.)/m(MPC)=10%,reaction time 4 h. Under such conditions the yield of MDC reached 60% and the selectivity of MDC reached 57%. |
Key words:methyl phenyl carbonate;methylene diphenyl dicarbamate;ion-exchange resin catalyst;condensation reaction |
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作者简介:何国锋(1982-),男,湖北钟祥人,硕士研究生。研究方向:绿色化工。
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联 系 人:田恒水,教授、博士生导师。研究方向:绿色化工,精细化工。 (E-mail:hstian@ecust.edu.cn)
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收稿日期:2008-03-21
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