ZnAlPO_4催化分解氨基甲酸酯制备六亚甲基-1,6-二异氰酸酯  

INVESTIGATION ON THE CATALYTIC DECOMPOSITION OF DIMETHYLHEXANE-1,6-DICARBAMATE TO SYNTHESIZE HEXAMETHYLENE-1,6-DIISOCYANATE BY ZnAlPO_4

作　　者：孙大雷[1] 黄振荣[1] 黄宇嘉[1] 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,广东广州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,湖南长沙410082

出　　处：《精细石油化工》2013年第1期75-79,共5页Speciality Petrochemicals

基　　金：国家自然科学基金(21206019)

摘　　要：采用静态水热合成法制备了Zn负载量不同的ZnAlPO4多相催化剂,并通过XRD和XPS分别对其结构和组成进行了表征。通过对氨基甲酸酯热分解反应系统的分析和六亚甲基-1,6-二异氰酸酯(HDI)回收率的考察,自行设计并组装了六亚甲基二氨基二甲酸甲酯(HDC)液相热分解制HDI的反应装置,并利用此装置考察了在邻苯二甲酸二辛酯(DOP)作热载体,邻苯二甲酸二甲酯(DMP)作溶剂,反应温度523K,真空度0.09MPa,氮气流速100mL/min,进料速率10.00g/(g.h),ZnAlPO4/HDC(摩尔比)为1.0%的反应条件下,不同Zn负载量的ZnAlPO4催化HDC液相热分解制HDI的反应活性。实验结果表明:相对ZnO催化剂,ZnAlPO4具有更高的催化活性和更好的热稳定性,在Zn/AlPO4(摩尔比)为0.4时,HDI收率可达64.78%。Twelve different molar ratio of Zn/AlPO4 for zinc-incorporated berlinite （ZnAlPO4） cataly-sts were prepared by hydrothermal synthesis method. The catalysts were characterized by XRD and XPS analyses. Their catalytic property was investigated in the catalytic decomposition of dimethylhex- ane-1,6-dicarbamate（HDC）, which were carried out on the stable and efficient reactor for cracking in the liquid phase self-designed. It was shown that ZnAlPO4 catalyst gave the better catalytic perform- ance when the molar ratio of Zn/AlPO4 was 0.4. The reaction conditions over ZnAlPO4 catalyst are as follows, dioctyl phthalate（DOP） as heat carrier, dimethyl phthalate（DMP） as solvent, reaction tem- perature of 523 K, reaction vacuum of 0.09 MPa, nitrogen flow rate of 100 mL/min, the feed rate of 10.00 g/（g . h）, molar ratio of ZnAlPO4/HDC 1.0%. The optimal conversion of HDC and the yield of HDI are 100% and 64.78%, respectively.

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 分解 多相催化 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业]