分子蒸馏浓缩菜籽油脱臭馏出物中维生素E的研究

CONCENTRATION OF VITAMIN E FROM RAPESEED OIL DEODORIZER DISTILLATE BY MOLECULAR DISTILLATION

菜籽油脱臭馏出物(RODD)中富含天然VE,是浓缩VE的重要原料。RODD直接结晶去除甾醇,并在蒸馏温度473K和压力2.66Pa时分子蒸馏脱除重组分。分子蒸馏馏出液经皂化、盐酸酸化、水洗干燥后作为分子蒸馏浓缩VE原料。当分子蒸馏刮膜转速为150rpm、真空度5.3Pa、蒸馏温度403K、进料速率2.068ml/min时,得到含26.32%VE的产品,VE回收率可达69.23%,轻组分FFA回收率达85%。甲酯化-蒸馏方法在蒸馏温度403K时获得30%纯度的VE。

Rapeseed oil deodorizer distillate （RODD） is an important source of natural vitamin E. Sterols were removed from RODD by crystallization and the resulting material was distilled at 473K and 2.66Pa to remove high boiling point substances. The distillate stream followed by saponification and acidulation was directly to concentrate VE by molecular distillation. When molecular distillation wiper speed set up at 150rpm, vapor pressure 5.3Pa, condenser temperature 403K and feed flow rate 2.068ml/min, the residue material was composed of 2.70% free fatty acid （FFA） and 26.32% VE. The recovery of Ve and FFA were 69.23% and 85%, respectively. 30% concentration of VE was obtained by the methyl esterification-distillation method when evaporator temperature was 403K.