强酸性离子交换树脂催化大豆油脱臭馏出物连续酯化反应  

Continuous esterification of soybean oil deodorizer distillate catalyzed by strong acidic ion exchange resin

作　　者：曹玉平 汪宝和[2] 陈学兵 

机构地区：[1]中粮天科生物工程有限公司,天津300457 [2]天津大学石油化工技术开发中心,天津300072

出　　处：《中国油脂》2012年第12期61-63,共3页China Oils and Fats

摘　　要：游离脂肪酸酯化是以油脂脱臭馏出物为原料,制备天然维生素E和植物甾醇的关键步骤,而传统酯化方法存在间歇操作、设备易腐蚀等缺点。以强酸性离子交换树脂为催化剂,对大豆油脱臭馏出物(DD油)的连续酯化反应进行了研究。考察了反应温度、进料流速、原料含水量以及醇油体积比对酯化反应的影响。结果表明:减少原料DD油中的含水量可促进酯化反应的进行,在反应温度70℃、醇油体积比1∶1、流速1 BV/h、DD油含水量0.05%的条件,通过二次酯化DD油酯化率可达到98%以上。Free fatty acid esterification is the key step in the preparation of vitamin E and phytosterols from oil deodorizer distillate （DD） , but the traditional esterification method has disadvantages, such as batch operation and easy equipment corrosion. Continuous esterification of soybean oil DD catalyzed by strong acidic ion exchange resin was studied. The influences of reaction temperature, feed flow rate, water content of raw material and volume ratio of methanol to soybean oil DD on the esterification reaction were investigated. The results showed that reducing the water content of raw material could promote the esteri- fication reaction ; the esterifcation rate of soybean oil DD could reach above 98 % by two - step esterifica- tion under the conditions of reaction temperature 70℃, volume ratio of methanol to soybean oil DD 1 ： 1, feed flow rate 1 BV/h and water content of soybean oil DD 0.05%.

关 键 词：大豆油脱臭馏出物 脂肪酸 连续酯化 离子交换树脂 

分 类 号：TS225.13[轻工技术与工程—粮食、油脂及植物蛋白工程]