Abstract

The possibility of obtaining potassium sulfate by converting calcium sulfate (phosphogypsum) and potassium chloride in an ammonia solution was investigated. The optimal conditions for the process at various concentrations of ammonia solution were determined. When using a 25% solution of NH₃, the stirring time is 30–60 min, the consumption rate of KCl is 160% from stoichiometry. When using a 40% ammonia solution, the stirring time has practically no effect on the conversion, and the KCl consumption rate is only 120% from stoichiometry. The conversion temperature in both cases should be 15–20°C; the mass ratio of gypsum and ammonia should be 1 : (3–5).

中文翻译：

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氨溶液中磷石膏和氯化钾的转化生产硫酸钾

摘要

研究了通过在氨溶液中转化硫酸钙（磷石膏）和氯化钾获得硫酸钾的可能性。确定了在各种浓度的氨溶液下该工艺的最佳条件。当使用25％的NH ₃溶液时，搅拌时间为30–60分钟，根据化学计量，KCl的消耗率为160％。当使用40％的氨溶液时，搅拌时间对转化率几乎没有影响，从化学计量上来说，氯化钾的消耗率仅为120％。两种情况下的转化温度均应为15–20°C。石膏和氨气的质量比应为1：（3–5）。