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分别以盐酸或氨基磺酸为催化剂水解斯替夫苷(St),研究底物质量浓度、反应温度、催化剂用量和反应时间对斯替夫苷水解的影响,着重考察了斯替夫苷的转化率、甜菊醇的产率和异甜菊醇的产率。其中,盐酸催化水解斯替夫苷的最优工艺条件为:反应温度95℃,底物质量浓度400 g/L,盐酸浓度0.04 mol/L,反应时间28 h;在该条件下,根据高效液相色谱分析计算得到斯替夫苷转化率接近100%,甜菊醇产率达83.6%,异甜菊醇产率达12.4%。氨基磺酸催化反应的工艺条件为:反应温度95℃,斯替夫苷质量浓度400 g/L,氨基磺酸浓度0.05 mol/L,反应时间31 h;在该条件下,根据高效液相色谱分析计算得到斯替夫苷转化率接近100%,甜菊醇产率达81.5%,异甜菊醇产率达11.7%。
The effects of substrate concentration, reaction temperature, catalyst amount and reaction time on the hydrolysis of statifurin were studied respectively by using hydrochloric acid or sulfamic acid as catalyst. Staphyloside conversion Rate, the yield of steviol and the yield of isostearyl alcohol. Among them, the optimum conditions for the catalytic hydrolysis of statif were as follows: the reaction temperature was 95 ℃, the concentration of substrate was 400 g / L, the concentration of hydrochloric acid was 0.04 mol / L, the reaction time was 28 h; Under this condition, The results showed that the conversion of Stevioside was close to 100%, the yield of steviol reached 83.6% and the yield of isoviruol reached 12.4%. The reaction conditions were as follows: the reaction temperature was 95 ℃, the concentration of statifuridine was 400 g / L, the concentration of sulfamic acid was 0.05 mol / L and the reaction time was 31 h. Under these conditions, The results showed that the conversion of Stevioside was close to 100%, the yield of steviol reached 81.5%, and the yield of isosteviol reached 11.7%.