固体酸催化菊芋块茎水解工艺的研究

Process Study on Solid Acid Catalysis and Hydrolysis of Helianthus tuberosus

以菊芋块茎打浆溶液为原料,并采用自制大孔强酸性苯乙烯系阳离子交换树脂Ⅰ作为固体酸催化剂对其水解条件进行了研究。分别考察了温度、反应时间、固液比和溶液质量分数对菊芋溶液水解反应中果糖得率的影响,得出最佳的水解工艺条件为∶V(固体酸)︰V(菊芋溶液)=1︰20,菊芋溶液质量分数为25%,温度为100℃,水解时间为60 min,在此条件下,果糖的得率达到60.56%,此时菊芋的水解转化率为83.3%。此法开创了菊芋块茎水解的先例,反应转化率高;经简单过滤后所得果糖溶液色泽澄清,质量好;催化剂可以重复利用,生产成本较低,为菊芋块茎的直接水解提供了一个全新的绿色工艺路线。

Helianthus tuberosus solution as raw materials and Macroporous strongly acidic styrene cation exchange resin I as a solid acid catalyst, the different factors of affecting the hydrolysis of Helianthus tuberosus solution were researched. The impact of temperature, reaction time, the ratio of solid acid and Helianthus tuberosus solution and the solution concentration on hydrolyzing of Helianthus tuberosus was investigated through single factor experiments. The best hydrolysis condition can be summarized. The results showed that the ratio of the solid acid and Helianthus tuberosus solution 1 ： 20, the concentration ofHelianthus tuberosus solution 25%. In this condition, it is hydrolyzed 60 rain at 100 ~C. The hydrolysis conversion rate ofHelianthus tuberosus is 83.3% and the fructose yield is 60.56%. This method created the precedent of hydrolyzing the Helianthus tuberosus, and it has a high conversion rate and good quality of fructose. The reaction liquid is clear and transparent after filtering. The catalyst can be used repeatedly and it has a low cost of production. It provides a green process route for direct hydrolysis of Helianthus tuberosus.