Department of Physical Chemistry, Faculty of Chemical Technology, University of Pardubice, Pardubice, Czech Republic.
Bioresour Technol. 2010 Apr;101(7):2071-5. doi: 10.1016/j.biortech.2009.11.035. Epub 2009 Dec 11.
The distribution of ethyl esters, triglycerides, diglycerides, monoglycerides, and glycerol between the ester and glycerol phase was investigated after the ethanolysis of rapeseed oil at various reaction conditions. The determination of these substances in the ester and glycerol phases was carried out by the GC method. The amount of ethyl esters in the glycerol phase was unexpectedly high and therefore the possibility of the reduction of this amount was investigated. The distribution coefficients and the weight distributions of each investigated substance were calculated and compared mutually. The distribution coefficients between the ester and glycerol phase increase in this sequence: glycerol, monoglycerides, diglycerides, ethyl esters, and triglycerides. Soaps and monoglycerides in the reaction mixture cause a worse separation of ethyl esters from the reaction mixture. The existence of a non-separable reaction mixture was observed also, and its composition was determined.
在不同反应条件下进行菜籽油的乙醇解反应后，研究了乙酯、甘油三酯、甘油二酯、甘油一酯和甘油在酯相和甘油相之间的分布。通过 GC 法测定酯相和甘油相中这些物质的含量。甘油相中乙基酯的含量出乎意料地高，因此研究了降低其含量的可能性。计算并相互比较了分配系数和每种研究物质的重量分布。酯相与甘油相之间的分配系数按以下顺序增加：甘油、单甘酯、二甘酯、乙酯和甘油三酯。反应混合物中的肥皂和单甘酯导致乙酯与反应混合物的分离效果变差。还观察到存在不可分离的反应混合物，并确定了其组成。
