水力空化强化大豆油脱臭馏出物酯化脱酸反应研究  

Enhancement of hydrodynamic cavitation in the esterification reaction of soybean oil deodorizer distillate

作　　者：占叶勇 聂勇[1] 陆向红[1] 许超群[1] 龚如朝 李肖华[1] 计建炳[1] 

机构地区：[1]浙江工业大学化工学院浙江省生物燃料利用技术研究重点实验室,杭州310014

出　　处：《中国油脂》2015年第6期62-65,共4页China Oils and Fats

基　　金：国家高新技术研究发展计划(863计划)资助(2014A022103)

摘　　要：大豆油脱臭馏出物是提取天然维生素E的重要原料。以大豆油脱臭馏出物为原料,在新型水力空化反应器内进行酯化脱酸研究,考察了空化元件入口压力、催化剂(浓硫酸)用量、循环流量和油醇空化体积比对酯化脱酸反应和维生素E收率的影响,并将水力空化混合技术与传统机械搅拌进行了对比。通过实验确定了水力空化反应器内酯化脱酸反应的最适参数:空化元件入口压力0.3 MPa,催化剂用量为油质量的3%,循环流量300 m L/min,油醇空化体积比5∶1;在上述最适参数条件下反应180 min酯化率可达到99%,维生素E的收率为99%。在相同原料配比条件下,与机械搅拌相比,水力空化强化混合条件下酯化率最高提高了12.1%。Soybean oil deodorizer distillate is an important raw material for natural VE extraction. The es-terification reaction of soybean oil deodorizer distillate was investigated in a novel hydrodynamic cavitationreactor. The effects of inlet pressure of cavitation element, dosage of catalyst （concentrated sulfuricacid）, circulation flow rate and cavitation volume ratio of oil to methanol on the esterification reaction andyield of VE were studied. Meanwhile, the hydrodynamic cavitation mixing technology and traditional me-chanical stirring were compared. The results showed that the optimal parameters of esterification reactionin the hydrodynamic cavitation reactor were obtained as follows： inlet pressure of cavitation element 0.3MPa, dosage of catalyst 3 % （based on the mass of oil） , circulation flow rate 300 mL/min and cavitationvolume ratio of oil to methanol 5： 1; under these conditions, the esterification rate reached 99% and theyield of VE was 99% when the reaction time was 180 min. Compared with mechanical stirring, the esteri-fication rate of hydrodynamic cavitation enhanced mixing increased by 12.1% under the condition of thesame ratio of raw materials.

关 键 词：水力空化 大豆油 脱臭馏出物 维生素E 酯化 

分 类 号：TS229[轻工技术与工程—粮食、油脂及植物蛋白工程]