Twelve different molar ratio of Zn/AlPO4 for zinc-incorporated berlinite (ZnAlPO4) catalysts 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-l,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 performance 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 temperature 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.%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523 K,真空度0.09 MPa,氮气流速100 mL/min,进料速率10.00 g/(g·h),ZnAlPO4/HIDC(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％.
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