title: Ethanolysis of rapeseed oil - distribution of ethyl esters, glycerides and glycerol between ester and glycerol phases.
abstract: 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.
authors.affiliation: Department of Physical Chemistry, Faculty of Chemical Technology, University of Pardubice, Pardubice, Czech Republic.
authors.forename: Michal
authors.initials: M
authors.lastname: Cernoch
authors.forename: Martin
authors.initials: M
authors.lastname: Hájek
authors.forename: Frantisek
authors.initials: F
authors.lastname: Skopal
mesh_terms: D002849:Chromatography, Gas; D004952:Esters / Q000032:analysis*; D000431:Ethanol / Q000737:chemistry*; D005229:Fatty Acids, Monounsaturated; D005989:Glycerides / Q000032:analysis*; D005990:Glycerol / Q000032:analysis*; D006868:Hydrolysis; D008970:Molecular Weight; D010938:Plant Oils / Q000737:chemistry*; D000074262:Rapeseed Oil
chemical_list: D004952:Esters; D005229:Fatty Acids, Monounsaturated; D005989:Glycerides; D010938:Plant Oils; D000074262:Rapeseed Oil; D000431:Ethanol; D005990:Glycerol