响应面法优化山桐子油脱色工艺

Optimization of bleaching process of idesia oil by response surface methodology

对山桐子原油进行脱胶、脱酸、脱色精炼处理。考察了脱色剂种类对脱色率的影响,并以脱色率为考察指标,活性白土(优选的脱色剂)添加量、脱色温度、脱色时间为考察因素,在单因素实验的基础上结合响应面法优化山桐子油的脱色工艺。对精炼前后山桐子油的理化指标和脂肪酸组成进行了测定。结果表明:最佳脱色条件为活性白土添加量17%、脱色温度94℃、脱色时间94 min,在此条件下山桐子油的脱色率为(91.07±0.43)%;精炼后,山桐子油的品质得到显著提升,脂肪酸组成及含量基本不变,亚油酸含量高达73.46%。

The idesia oil was refined by degumming,deacidification and bleaching.The effect of decolorizer type on bleaching rate was investigated.With bleaching rate as an index and activated clay(preferred bleaching agent)dosage,bleaching temperature and bleaching time as factors,the bleaching process of idesia oil was optimized by response surface methodology.The physicochemical indexes and fatty acid composition of the idesia oil before and after refining were determined.The results showed that the optimal bleaching conditions were obtained as follows:activated clay(preferred bleaching agent)dosage 17%,bleaching temperature 94℃and bleaching time 94 min.Under these conditions,the bleaching rate of idesia oil was(91.07±0.43)%.After refining,the quality of idesia oil was improved significantly,and the fatty acid composition and content of idesia oil remained the same with linoleic acid content of 73.46%.