Design research of a new process for production of potassium sulfate by ammonium sulfate conversion method
CHENG Jia-lin1, CHI Yong-qing1, JIA Pan-feng2
1. School of Chemical and Biological Engineering, Taiyuan University of Science and Technology, Taiyuan 030021, China; 2. Shanxi Huapu Testing Center, Taiyuan 030199, China
Abstract: The design and experimental study on a new process for the preparation of potassium sulfate via ammonium-potassium sulfate conversion method is introduced.According to the water-salt phase diagram of the system,the new process designed is composed of three parts:potassium sulfate preparation,thermal precipitation of ammonium-potassium sulfate,and preparation of ammonium chloride.The experimental study is conducted through using industrial grade raw materials based on newly-designed process parameters and operation indexes.The obtained experimental data are in good agreement with the newly-designed process parameters.The prepared K2SO4 contains 51.63% of K2O and the utilization rate of K2O reaches 92.16%.Ammonium-potassium sulfate,refined potassium sulfate mother liquor Ⅱ,crude ammonium chloride mother liquor Ⅳ,and recrystallized ammonium chloride mother liquor Ⅴ generated during the process are all recycled back to the system.The whole process is a closed loop and there is no pollutant to discharge.
程加林, 池永庆, 贾攀锋. 硫酸铵转化法制取硫酸钾新工艺设计研究[J]. 现代化工, 2019, 39(11): 180-184.
CHENG Jia-lin, CHI Yong-qing, JIA Pan-feng. Design research of a new process for production of potassium sulfate by ammonium sulfate conversion method. Modern Chemical Industry, 2019, 39(11): 180-184.