【摘要】 以自制三羟甲基己烷为原料 ,采用自制的负载磷钨酸催化剂催化合成一系列三羟甲基己烷脂肪酸酯。通过大量实验研究了影响催化剂活性和酯化率的因素 ,筛选出最佳催化剂并确定了适宜的酯化工艺条件。最佳催化剂制备条件 :载体与活性物质量比 1/ 6 ,浸渍时间 5h ,烘焙温度 32 0℃。适宜的酯化工艺条件 :反应时间 12 0min ,反应温度2 2 0℃ ,压力 0 0 2～ 0 0 4MPa,催化剂质量分数 1 8%,庚酸 /三羟甲基己烷摩尔比 3 7/ 1 0。在此条件下酯化率可达96 0 %以上 ,而且催化剂可重复使用。通过质量检测及光谱分析 ,对目标产物进行了确证。更多还原

【Abstract】 A series of trimethylolhexane triheptyl esters were synthesized from trimethylolhexane with special kinds of supported phosphotungstic acid catalyst. The factors affecting catalyst activity and esterification conversion were discussed, and the optimum conditions for catalyst and trimethylolhexane triheptyl esters preparation were obtained. The optimum conditions for catalyst preparation were: m(support)/m(active component), 1/6; impregnation time,5 h; baking temperature, 320 ℃. The optimum conditions for esterification were: reaction time, 120 min; reaction temperature, 220 ℃;mass fraction of catalyst, 1.8%; mole ratio of haptanone and trimethylolhexane,3.7/1.0. The esterification conversion reached over 96.0% under the optimum conditions. Moreover, the catalyst was used repeatedly. The product was also verified by quality test and spectroscopic analysis.更多还原