What is Methyl colza oil acid ester

Methyl colza oil acid ester is a light yellow oil liquid with the saponification value 180-195mgKOH/g and the  iodine value 100-115gI2/100g(MAX). It is used in auxiliary for light textile . It is a methyl ester mixture made up of saturated and unsaturated C16 to C22 fatty acids. Technically, methyl esters of rapeseed are produced by chemical conversion of rapeseed oil (colza oil), using methanol. For this aspect, supercritical methanol method without using any catalyst is evaluated in this work for reaction of free fatty acids. As a result, complete conversion is achieved for saturated fatty acids to methyl esters at temperatures above 400°C, whereas for unsaturated fatty acids, lower temperature of 350°C is appropriate, and higher temperature resulted in a degradation of the products.
Chemical conversion of refined rapeseed oil (colza oil) with methanol yields methyl esters of rapeseed in the form of a clear, thin, combustible, non water-soluble liquid that gives off a faint smell. It is used as a substitute for diesel fuel (Biodiesel) but methyl ester of rapeseed is also used as a solvent in the specialist industries (adhesives). The principal constituents of methyl ester of rapeseed are oleic (55-65%), linoleic (18-25%), linolenic (5-11%) and palmitic acids (5-8%). Other fatty acids account for <1% of the product. Consequently, a conversion of free fatty acids to methyl esters is highest, over 95%, when treated at 350°C. Fortunately, this temperature treatment is also most appropriate for transesterification of triglycerides. Thus, the overall conversion process of rapeseed oil to methyl esters is concluded to be adequate at 350°C.
Category : Organic chemicals and Derivatives
Uses :  auxiliary for light textile
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