苦汁から硫酸加里の製造に就て (第1報):塩化加里と硫酸マグネシウムの複分解の相律的検討

概要

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At several temperatures,the isothermal equilibrium diagrams of the four components -systems for the reciprocal salts pair,K2Cl2+MgSO4=K2SO4+MgCl2, were made of the known data found in the Tables (9)by D'Ans.For the method of representation,four axis were used, as known as the Loewenherz diagram. And calculated graphically the yields of potassium and sulphate at various temperatures ranging from 0° up to 85°C. As the results,the author concluded as follows:(1)The yield of potassium for the preparation of "Jai ragnesia" by the double decomposition of potassium chloride with magnesium sulphate is about 93% in the range from 12.5° up to 35°C, if the leonite be preferred to schoenite at 25° and 35°C. (2) The yield of potassium for the preparation of potassium sulphate by the double decomposition of "kalimagnesil" with potassium chloride is adout 68% in the temperature ringe from 0° up to 35°C. (3) Therefore, the final yield of potassium for the two step method of the preparation of potassium sulphate, through the "kalimagnesia",is about 63% in the temperature range from 12.5° up to 35°C. (4) In the case of the direct method for the preparation of potassium sulphate by the double decomposition of potassium chloride with magnesium sulphate, the yield of potassium is about 47% in the temperaturere range from 0° up to 35°C, which is far inferrior to that for the two step method.
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