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在不同条件下制备了固体酸TiO2 /SO2 -4 催化剂。用TLC法研究了该催化剂在D -葡萄糖与甲醇、乙醇、正丁醇、正戊醇和正十二醇的苷化反应中的催化性能。在反应中得到较短碳链的D -葡萄糖苷 ,如甲苷、乙苷、正丁苷和正戊苷 ,而不能得到长链的正十二烷基D -葡萄糖苷。适合于生成正丁苷的催化剂制备的较佳条件为H2 SO4浸泡浓度c =0 1mol/L ,焙烧温度θ =35 0～ 5 0 0℃ ,焙烧时间t =3h。催化剂用量约为D -葡萄糖用量的 6 %。
The solid acid TiO2 / SO2-4 catalyst was prepared under different conditions. The catalytic performance of the catalyst in glycosylation of D - glucose with methanol, ethanol, n - butanol, n - amyl alcohol and n - dodecanol was studied by TLC. D - glucosides with shorter carbon chains such as glycosides, ethanosides, n - butanosides and n - pentanosides were obtained in the reaction, but long - chain n - dodecyl D - glucosides were not obtained. The optimum conditions for the preparation of n-butyl glycoside catalyst are as follows: H2 SO4 impregnation concentration c = 0 1mol / L, calcination temperature θ = 35 0 ~ 5000 ℃, calcination time t = 3h. The amount of catalyst is about 6% of D-glucose.