各種グリセリドの分別に関する研究 (第1報) : 尿素付加物法によるグリセリドの分別

概要

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Mixtures of glycerides prepared by glycerolysis or direct esterification were fractionated in homogeneous phase by urea adduct method. Urea was added in each fractional stage. The weight of urea and solvent to be added, the solubility of urea in solvents and a forming tendency of urea adducts were examined. The experimental results were summarized as follows : 1) It is better for monolaurin and dilaurin to dissolve in methanol and also for trilaurin in methanol-benzene. 2) The ratios of urea and the solvent, 5 : 50 and 5 : 100 by weight, were the best for monolaurin and dilaurin respectively when 5g of the sample was used. 3) In case urea was added to the sample dissolved in methanol-benzene, a great deal of trilaurin could not form urea adduct, but crystallized more rapidly than 1, 3-dilaurin adduct. 4) In the above experimental conditions, pure 1-monolaurin, 1, 3-dilaurin and trilaurin were isolated. 5) On the tendency which glycerides are fractionated, the following results were obtained. Trilaurin>1.3-dilaurin >1.2-dilaurin>1-monolaurin> 2-monolaurin.
社団法人日本油化学会の論文