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›› 2001, Vol. 1 ›› Issue (4): 0-0.

• 4 •    

铬酸钾碳酸化回收钾碱的初步研究

杨仁春，何立惠, 李佐虎，张懿   

  1. (1. 中国科学院化工冶金研究所，北京100080；2. 河南省南阳市环境保护监测站, 河南 南阳 473000
  • 出版日期:2001-08-20 发布日期:2001-08-20

Preliminary Study on the Carbonation of K2CrO4 for Recovery of Potassium Alkali

YANG Ren-chun1, HE Li-hui2, LI Zuo-hu1, ZHANG Yi1   

  1. 1. Institute of Chemical Metallurgy, Chinese Academy of Sciences, Beijing 100080, China;2. Environmental Protection Monitoring Station, Nanyang, Henan 473000, China
  • Online:2001-08-20 Published:2001-08-20

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摘要： 探讨了铬酸钾碳酸化制备钾碱的反应过程中铬酸钾初始浓度、二氧化碳分压和反应温度对碳酸化结果的影响. 结果表明，在铬酸钾浓度为40%、二氧化碳分压0.6 Mpa、反应终点温度18℃的条件下, 所得碳酸氢钾的浓度可达225 g/L以上. 并推导了其反应机理和动力学方程.

关键词: 铬酸钾, 碳酸化, 钾碱, 动力学

Abstract: The effects of the K2CrO4 concentration, CO2 pressure and temperature on equilibrium concentration of KHCO3 were investigated respectively during the K2CrO4 carbonation with kinetic equations derived. Experimental results showed that the equilibrium concentration of KHCO3 was above 225 g/L under the optimal conditions of 40% K2CrO4 concentration, 0.6 MPa CO2 pressure and 18oC temperature. The kinetic equation was derived and its parameter was confirmed by experimental data .

Key words: K2CrO4, carbonation, potassium alkali, kinetics

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