铬酸钾碳酸化回收钾碱的初步研究  

Preliminary Study on the Carbonation of K_2CrO_4 for Recovery of Potassium Alkali in Alkaline Solution

作　　者：杨仁春[1] 何立惠 李佐虎[1] 张懿[1] 

机构地区：[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　　处：《过程工程学报》2001年第4期422-426,共5页The Chinese Journal of Process Engineering

基　　金：中国科学院重大和特别基金资助项目(编号:KZ95T05)

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18oC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.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 .

关 键 词：铬酸钾 碳酸化 钾碱 动力学 回收 

分 类 号：TQ114.3[化学工程—无机化工]