Ethanolysis of rapeseed oil – Distribution of ethyl esters, glycerides and glycerol between ester and glycerol phases

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 o...

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Bibliographic Details
Published in:Bioresource technology 2010-04, Vol.101 (7), p.2071-2075
Main Authors: Černoch, Michal, Hájek, Martin, Skopal, František
Format: Article
Language:English
Subjects:
acylglycerols
Biodiesel
Biofuel production
Biological and medical sciences
biomass
Biotechnology
Canola Oil
Chromatography, Gas
Distribution
Energy
esters
Esters - analysis
Ethanol - chemistry
Ethanolysis
fatty acid esters
fatty acid ethyl esters
Fatty Acids, Monounsaturated
Fundamental and applied biological sciences. Psychology
Glycerides - analysis
glycerol
Glycerol - analysis
Hydrolysis
Industrial applications and implications. Economical aspects
Molecular Weight
Plant Oils - chemistry
rapeseed oil
renewable energy sources
Separation
Transesterification
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Summary: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.
ISSN:0960-8524
1873-2976
DOI:10.1016/j.biortech.2009.11.035