酸水解法制糖工艺条件研究

Study on process conditions of sugar manufacturing by acid hydrolysis

以原料成本低、总糖收率高为目标对玉米秸秆硫酸水解糖化新工艺(常压两段酸水解工艺)进行了研究。结果显示常压两段酸水解工艺的效果明显优于浓酸水解。常压两段酸水解较佳的工艺条件为:一段酸水解中,酸浓度60%,水解时间0.5 h,温度45℃,酸固比12∶1;二段酸水解中,水解时间2.0 h,水解温度100℃,水固比220∶1,所得水解液中总糖收率可达93.81%。

A new technique of sulfuric acid hydrolysis sugar from corn stalk(normal pressure two-section acid hydrolysis technology) is studied.The experiments show that the normal pressure two-section acid hydrolysis is obviously superior to concentrated acid hydrolysis.The process conditions of normal pressure two-section acid hydrolysis are optimized as follows:the first section hydrolysis in 60% sulphuric acid at 45℃ for 0.5 hour,the ratio of acid and solid was 12∶1;the second section acid hydrolysis,the ratio of water and solid was 220∶1,and then the hydrolysis temperature at 100℃ for 2 hours.The yield of total sugar in hydrolysate can reached 93.81%.