【摘要】 在异丙醇-环己烷混合溶剂浸出菜籽饼工艺研究的基础上,进一步对浸出菜籽饼的浸出条件、混合油中多糖类杂质的脱除、混合溶剂的分离回收、湿粕的脱溶、混合油的脱溶等进行研究。得出适宜的工艺条件为:菜籽饼水分含量小于10%,浸出温度62℃,液料比3∶1,浸出溶剂95%异丙醇-环己烷(3∶1);混合油水洗温度60℃,热水加入量0.8～1倍95%异丙醇;异丙醇水溶液蒸发温度100℃,盐效萃取中碳酸钾溶液的质量分数50%,50%碳酸钾溶液与95%异丙醇体积比2∶1;碳酸钾溶液的蒸发温度59℃,真空度0.095 MPa。更多还原

【Abstract】 On the basis of oil extraction from rapeseed cake by mixed solvents of isopropanol and cyclohexane,extraction conditions of rapeseed cake,removal of impurities(polysaccharide) from miscella,separation and recovery of mixed solvents and desolventizing of wet meal and miscella were studied.The optimal conditions were obtained as follows:moisture content of rapeseed cake less than 10%,leaching temperature 62 ℃,ratio of liquid to solid 3∶ 1,mixed solvents 95% isopropanol and cyclohexane(3∶ 1),washing temperature of miscella 60 ℃,dosage of hot water 0.8-1 times of 95% isopropanol,evaporation temperature of isopropanol water solution 100 ℃,mass fraction of potassium carbonate solution in salting-out extraction 50%,volume ratio of 50% potassium carbonate solution to 95% isopropanol 2∶ 1 and evaporation temperature of potassium carbonate solution 59 ℃ under vacuum of 0.095 MPa.更多还原