TiGeW_(12)O_(40)/TiO_2催化剂微乳液法合成葡萄糖酯

研究了以固载杂多酸TiGeW12O40/TiO2为多相催化剂,葡萄糖、硬脂酸为原料,1,2-丙二醇为溶剂,十二烷基硫酸钠为乳化剂合成葡萄糖酯的微乳化反应条件。结果表明,TiGeW12O40/TiO2是合成葡萄糖酯的良好催化剂,最佳反应条件是:葡萄糖用量0.025mol,乳化剂用量30mL,葡萄糖/硬脂酸(摩尔比)=1:1.2,w(催化剂)=2%,反应时间1.5h,反应温度120～130℃,葡萄糖硬脂酸酯的收率可达92.4%。

SYNTHESIS OF GLUCOSE STEARATE CATALYZED BY TiGeW12O40/TiO2 IN MICROEMULSION

Glucose stearate was synthesized with TiGeW12O40/TiO2 as multiphase catalyst, glucose and stearic acid as reactants, 1,2-propylene glycol as solvent, sodium dodecyl sulfate as emulsifying agent, and the condition for microemulsifying the reaction system was studied. The results showed that TiGeW12O40/TiO2 is a good catalyst for glucose esterification, and the optimum reaction conditions are as follows: glucose 0. 025 mol, emulsifying agent 30 mL, molar ratio of glucose to stearic acid 1∶1.2, w(catalyst) 2% , reaction time 1. 5 h, and reaction temperature 120-130℃. Under these conditions, the yield of glucose stearate is 92. 4%.