苦汁から硫酸加里の製造について (第3報):カーナリツトと苦汁加里塩との複分解によるカリマグネシアの製造についての相律的検討

概要

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A method of graphical calculation of the quantitative relations in the preparation of schoenite or leonite by the double decomposition or artificial carnallite with the "earthy sulphate", was devised. By using the euilibrium diagram for the five components system of oceanic salts, i. e., Na+-K+-Mg++-Cl--SO4-H2O system saturated with NaCl, the optimum proportion of carnallite, eathy sulphate and water in the initial mixture for the double decomposition, yield of potassium, amount of schoenite or leonite obtainable, and amount of NaCl acompanying it, were computed at 0°, 10°, 15°, 25°, 40° and 55°C. By this means, the followings weie found:(1) At a ternperature, the best yield of potassium was gain, when the ratio of MgCl2/KCl in the mothor liquor is maximum.(2) It is desirable to use the "earthy sulphate" containing the less NaCl and the more KCl, such as obtained at lower tempetature under high vacum.(3) At 0°-20°C, schoenite is obtainable, and 20°-55°C leonite is obtained,(4) The best condition to get schoenite was found at about 10°C, and leonite at 30°-40°C.(5) As the best result, yield of potassium reached. to 81% and the purity or the kalimagnesia to 88% containing 12% NaCl.
日本海水学会の論文