摘要
以豆油脱臭馏出物为原料利用超临界CO_2提取维生素E,原料的甲酯化处理是重要的步骤之一,甲酯化结果表明,影响甲酯化的主要因素是甲醇与豆油脱臭馏出物的重量比例、酯化温度、酯化时间,而催化剂硫酸浓度的影响较小,最佳酯化因素组合是甲醇与豆油脱臭馏出物的重量比为0.6、硫酸浓度1％、酯化温度80℃、酯化时间60min,酯化率可达75.59％。而影响维生素E保存率的主要因素是酯化时间、酯化温度,甲醇与豆油脱臭馏出物的重量比例,硫酸浓度影响较小,在酯化过程中,维生素E的保存率最好可以达到95.82％。
Methanol esterification is one of the most important steps in the process of natural vitamin E extraction using supercritical carbon dioxide from soybean deodorized sludge (SDS) , the esterification results showed that the important factors affecting the esterification ratio were the weight ratio of methanol and SDS, temperature and esterification time, sulfuric acid concentration had little influence , the best factor combination was that the weight ratio of methanol and SDS was 0. 6, sulfuric acid 1%, temperature 80℃ and time 60 min, at this conditions, the highest esterification was 75. 59%. As to vitamin E maintenance, the most important factors were esterification temperature and time, the weight ratio of methanol and SDS, sulfuric acid concentration had minor affect. During esterification, 95. 82% of vitamin E can be kept.
出处
《西北农业学报》
CAS
CSCD
2002年第4期42-45,共4页
Acta Agriculturae Boreali-occidentalis Sinica
基金
江苏省自然科学基金(BK99112)
高等学校博士学科点专项基金(97029901)
