摘要
研究通过亚临界流体提取技术提取玉米淀粉残渣中的油脂,再将提取出的油脂经过预酯化过程、醇解过程,制备生物柴油。结果表明,在玉米淀粉残渣油脂的亚临界流体提取过程中,适宜条件为提取温度40℃、每次提取时间40 min、料液比1∶2、提取次数3次,在该条件下油脂得率为46.68%;预酯化过程的适宜条件:在真空条件下,反应温度190℃,甘油添加量为理论添加量的175%,催化剂用量为油脂质量的2%,反应时间3 h;经预酯化处理后进一步醇解得到生物柴油,醇解反应的脂肪酸甲酯产率为95.21%。
The oil in corn starch residue was extracted by subcritical fluid. With the oil as raw material, the biodiesel was prepared by pre - esterification and alcoholysis reaction. The results showed that the optimal conditions of subcritical fluid extraction of oil in corn starch residue were obtained as follows: extraction temperature 40 ℃, each extraction time 40 min, ratio of material to liquid 1 : 2 and extraction three times. Under these conditions, the oil yield was 46.68%. The optimal conditions of pre- esterifi- cation were obtained as follows: in vacuum condition, reaction temperature 190℃, glycerol dosage 175% (based on theoretical dosage), catalyst dosage 2% (based on oil mass) and reaction time 3 h. After pre - esterification, the biodiesel was obtained by alcoholysis reaction, and the yield of fatty acid methyl ester in alcoholysis reaction was 95.21%.
作者
杜高发
张俊浩
张登辉
杨继国
郭新东
DU Gaofa ZHANG Junhao ZHANG Denghui YANG Jiguo GUO Xindong(College of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China Guangzhou Quality Supervision and Testing Institute, Guangzhou 511447, China South China Institute of Collaborative Innovation, Dongguan 523808, Guangdong, China)
出处
《中国油脂》
CAS
CSCD
北大核心
2017年第9期112-116,共5页
China Oils and Fats
基金
"十二五"科技支撑计划子课题(2012BAD33B11)
关键词
玉米淀粉残渣油脂
亚临界流体提取
预酯化
生物柴油
oil in corn starch residue
subcritical fluid extraction
pre -esterification
biodiesel