Application of silver-based dihydric alcohol to the extraction of methyl linolenate with high extractability and stability replacing ionic liquids  

作　　者：Qianxia Chen Xianghong Lu Jianbing Ji 

机构地区：[1]Biodiesel Laboratory of China Petroleum and Chemical Industry Federation,Zhejiang Province Key Laboratory of Biofuel,College of Chemical Engineering,Zhejiang University of Technology,Hangzhou 310014,China

出　　处：《Chinese Journal of Chemical Engineering》2020年第3期871-880,共10页中国化学工程学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(2014AA022103);the Zhejiang Province Public Welfare Technology Application Research Project(LGG20B060003)。

摘　　要：A novel silver-based dihydric alcohol extractant was substituted for ionic liquids to enrich methyl linolenate(C18-3)from tallow seed oil methyl ester in this study.The interactions among dihydric alcohol,Ag(I)and C18-3 were explored by FT-IR spectroscopy.The effects of dihydric alcohol structure,carrier Ag(I)concentration,temperature and initial feed concentration on extraction yield and selectivity were reported.The good extraction performance was achieved by 1,4-butanediol containing AgBF4.The complexation of Ag(I)with C18-3 was dominant in extraction operation rather than physical partition.Furthermore,a multi-step reverse extraction method was proposed to obtain C18-3 product and regenerate the extractant.1-Hexene as the stripping phase can facilitate C18-3 reverse extraction.The content of C18-3 in the product was up to 93.36%,and the yield was 73.76%.This work opened a new route for the utilization of the dihydric alcohol properties to manipulate the carrier efficiency for extracting unsaturated fatty acid methyl esters at a lower cost.

关 键 词：Liquid–liquid extraction Dihydric alcohol COMPLEXATION AgBF4 Reverse extraction 

分 类 号：TQ028.32[化学工程]