Abstract
The authors had reported the manufacturing methods, of the ion exchangers by the sulfuric acid treatment of the coaly matters and their some behaviours in the previous reports.In these reports, the results of the experiments in which they were used as the catalysers of esterification of higher fatty acids, and as the exchange columns of hard water in the percolating method for the desalting are described In the 3rd and 4th reports, the coaly cation exchangers were used as the Catalysers of ethyl and butyl esterification of wholly hardered soyabean oil fatty acids and it Was recognized that the sulfonic acid groups of the exchangers had the catalytic activity.The conditions of esterification, the variations of activity of, catalyser in the successive uses, the esterification method in which the evolved water was removed as the boiling mixture from the reaction system, continuous esterification method, etc, were studied and the good results were obtained.In the th and 6 th reports the desalting tests of the artificial hard water in the percolating method were carried out, the pH values of effluents being measured, and the variation of the pH values of supplied water as well as the variation of activity of the exchanger in the successive employments being, studied.The results were evaluated by the neutralising curves of the coaly cation exchangers, which were designed by the potentiornetric titration of them.
