マレイン化きり油の分別について
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概要
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The present work aims at the development of fractionation technique for the products obtained by the reaction of tung oil with maleic anhydride at 120°C for 14 hrs. Samples of maleinized tung oil were fractionated by TLC on adsorbent layers of Silica Gel G developed in a solvent system of petroleum ether-diethyl ether-formic acid 5 : 5 : 0.1 (vol/vol/vol). Six fractions were separated and hydrolyzed followed by methylation. The resulting methyl esters were analyzed by GLC, obtaining the following conclusions with the structure of each fraction.<BR>Fr. 1 (R<SUB>f</SUB>=0.93) : Unreacted glycerides.<BR>Fr. 2 (R<SUB>f</SUB>=0.88) : Maleic anhydride mono-adducts of glycerides.<BR>Fr. 3 (R<SUB>f</SUB>=0.74) : By-products of unknown structure (very small amounts).<BR>Fr. 4 (R<SUB>f</SUB>=0.71) : Maleic anhydride di-adducts of glycerides.<BR>Fr. 5 (R<SUB>f</SUB>=0.41) : Maleic anhydride tri-adducts of glycerides with small amounts of by-products.<BR>Fr. 6 (R<SUB>f</SUB>=0.00) : Mainly by-products including polymerized products.<BR>Further, it was found that the separation of the mono-adducts of succinic type derived from oleic acid and those of cyclohexenic type derived from α-and β-eleostearic acids is attainable by use of GLC for their methyl ester.
- 社団法人 日本油化学会の論文