トール油の利用に関する研究 (第5報)
トール油のメチルエステル化
1961 年 10 巻 1 号 p. 37-41
詳細
1961 年 10 巻 1 号 p. 37-41
It was studied that the mixed methyl ester of tall oil is prepared on the similar composition as the original crude tall oil which is the mixture of fatty acids and rosin acids, and the acid value of produced ester is lowered as possible. The author discussed the conditions of following various esterification processes, that is, the oil and methanol mixture are heated with or without catalysts in an autoclave, and the soap of the oil is reacted with methyl iodide or dimethyl sulfate. It was found that ZnCl2, MgO and active clay are effective as catalyst on the autoclave process, and it is required that the oil and methanol are heated at 300°C under 100kg/cm2 pressure in an autoclave without catalyst. When partial methyl esters, which only fatty acids are esterified but rosin acids are neseterified by oridinary eterification, are neutralized by KOH and dissolved in methanol, then they are heated with methyl iodide of three times of theoretical amount, or they are agitated with a mol of dimethyl sulfate at room temperature, the required methyl esters are produced.
