氨基甲酸酯气相热分解制六亚甲基-1,6-二异氰酸酯  

Preparation of 1,6-Hexamethylene Diisocyanate by Decompostion of Dimethylhexane-1,6-Dicarbamate in Gas

作　　者：孙大雷[1] 谢顺吉[2] 邓剑如[2] 晁自胜[2] 

机构地区：[1]广东工业大学轻工化工学院,广州广东510006 [2]湖南大学化学化工学院化学计量学与化学生物传感技术国家重点实验室,长沙湖南410082

出　　处：《化学反应工程与工艺》2010年第2期184-187,共4页Chemical Reaction Engineering and Technology

摘　　要：在自行设计组装的六亚甲基二氨基二甲酸甲酯(HDU)气相热分解制六亚甲基-1,6-二异氰酸酯(HDI)的反应装置上,考察了溶剂的稳定性,HDU气相热分解制HDI的工艺条件以及催化剂对HDI收率的影响。结果表明:以邻苯二甲酸二辛酯(DOP)为溶剂,碱性Al_2O_3为催化剂,在HDU 1.0 g,DOP50 mL,真空度0.09 MPa,氮气流速100 mL/min,进料速率68 mL/h,反应温度330℃和催化剂用量为HDU质量的30%的条件下,HDI的收率可达93%。The apparatus for Preparation of 1,6-hexamethylene diisocyanate （HDI） by decompostion of dimethylhexane-1,6-dicarbamate （HDU） in gas was designed and assembled, in which the stability of solvents and the effects of reaction conditions and catalsyt on the yield of HDI were investigated. The results showed that the solvent dioctyl phthalate was stable and the basic Al2O3 exhibited excellent catalytic performance, and the yield of HDI reached 93% under the conditions of HDU 1.0 g, DOP 50 mL, vacuum 0.09 MPa, N2 100 mL/min, feed rate 68 mL/h, 330℃ and mass fraction of catalyst to HDU 30%.

关 键 词：六亚甲基-1 6-二异氰酸酯 六亚甲基二氨基二甲酸甲酯 气相热分解 

分 类 号：TQ225.24[化学工程—有机化工]