1,6-己二氨基甲酸甲酯热分解制备六亚甲基二异氰酸酯的研究  

Study on preparation of hexamethylene diisocyanate by thermal decomposition of dimethyl-hexane-1,6-dicarbamate

作　　者：王振兴[1] 余静文[1] 金珊[1] 于廷云[1] 金申[1] 

机构地区：[1]辽宁石油化工大学化学与材料科学学院,辽宁抚顺113001

出　　处：《石化技术与应用》2012年第1期31-35,共5页Petrochemical Technology & Application

基　　金：教育部留学回国人员科研启动资金项目(项目编号:2008890)

摘　　要：先使1,6-己二胺(HDA)与碳酸二甲酯(DMC)反应生成1,6-己二氨基甲酸甲酯(HDU,中间体),然后使HDU在催化剂和热载体存在下热分解为六亚甲基二异氰酸酯(HDI)。研究了工艺条件对中间体合成及其热分解反应的影响。结果表明,在催化剂为硝酸铅且n(HDA)/n(硝酸铅)为10,反应温度为75℃,n(DMC)/n(HDA)为8,反应时间为120 min的最佳工艺条件下合成中间体,HDU收率为92.3%;在催化剂为氧化锌-氧化铝,热载体为邻苯二甲酸二辛酯,反应压力(真空度)为9.0 kPa,反应温度为240℃的最佳工艺条件下热分解HDU,HDI收率为86.1%。The dimethyl - hexane - 1,6 - dicar- bamate （ HDU,intermediate ） was synthesized by reacting 1,6 - hexadiamine（HAD） and dimethyl carbonate （DMC）, and then HDU decomposed into hexamethylene diisocyanate （HDI） in the presence of catalyst and heating medium. The effect of operating condition on the synthesis and thermal decomposition of the intermediate was investigated. The results showed that with lead nitrate as catalyst under the optimum condition of mole ratio of HDU to lead nitrate 10, reaction temperature 75 ℃, mole ratio of DMC to HDA 8,reaction time 120 min,the yield of HDU was 92.3% ;with zin oxide -aluminum oxide as catalyst,dioctyl phthalate as heating medium under the optimum condition of reaction pressure 9.0 kPa, temperature 240 ℃ , I-IDU was decomposed and the yield of HDI was 86.1%.

关 键 词：六亚甲基二异氰酸酯 1  6-己二氨基甲酸甲酯 碳酸二甲酯 氨基甲酸酯 

分 类 号：TQ226.63[化学工程—有机化工]