溶剂法制备高粘度羧甲基淀粉

以玉米淀粉为原料,乙醇为溶剂,用溶剂法制备高粘度羧甲基淀粉。应用正交设计法研究了影响淀粉羧甲基化反应的各种因素,通过检测粘度确定了制取高粘度羧甲基淀粉的最佳反应条件:淀粉、氢氧化钠、氯乙酸的浓度分别为0.7、0.586、0.36 mol/L,乙醇质量分数为0.85,醚化时间为1 h,醚化温度为50℃。通过实验获得粘度为1 128 mPa.s的羧甲基淀粉产品。

Preparation of Solvent-Based High Viscosity Carboxymethyl Starch

Objective To optimize the enrichment process of glycyrrhizic acid by intermittence foam fractionation. MethodsInvestigating the every factors one by one, and the recovery obtained, enrichment radio and purity were used to optimize the process. ResultsThis method was proved to be with a high recovery obtained which was 91.9%, enrichment radio was 6.4, and purity was 32.3%, while pH value was 4, concentration was 0.23 mg/mL, airflow rate was 600 mL/min, and volume was 1 000 mL. ConclusionIntermittence foam fractionation of glycyrrhizic acid is a new, viable, and effective method.