Abstract:

The catalyzed liquefied degradation of beet pulp（BP）in the system of solid phosphotungstic acid as catalyst and polyethyleneglycol 400（PEG 400）/ glycerol（GLY）as complex liquefier was studied，and the effect of processing conditions of BP liquefaction such as liquefaction temperature，catalyst amount，liquid-to-solid ratio，liquefaction time on the liquefaction reaction and properties of liquefaction product were investigated. The results showed that BP had good liquefaction effect，the optimum liquefaction processing conditions were determined as follows：PEG 400/glycerol mass ratio 4∶1，liquefaction temperature 160 ℃，catalyst amount 4%，liquid-to-solid mass ratio 12∶1 and liquefaction time 160min，the liquefaction rate would reach 99.0%. Hydroxyl value and acid value of liquefaction mixtures were 45—86 mg/g and 0.61—0.75 mg/g respectively，which was a low hydroxyl value plant-based polyol.

摘要：

以甜菜粕为原料，在固体磷钨酸为催化剂、聚乙二醇400和丙三醇为复合液化剂的反应体系中，研究了甜菜粕液化降解制备植物基多元醇的方法。结果表明，甜菜粕具有很好的液化效果，在复合液化剂中聚乙二醇400与丙三醇质量比为4∶1、液化温度为160 ℃、催化剂用量为4%、液固比为12∶1、液化时间为160 min时，最高液化率可达99.0%，液化产物的羟值为45～86 mg/g，酸值为0.61～0.75 mg/g，为低羟值植物基多元醇。