摘要
介绍了以重灰为原料制备高纯碳酸钠的小试实验研究。结果表明,使用溶析法得到的产品纯度较高,但产率较低,不适合大量生产。使用陶瓷膜过滤法可以制备出符合试剂级要求的产品,最佳工艺条件为:使用孔径为0.8,μm的膜进行处理,每处理100,g重灰需加入浓度为0.1,mol/L Na OH溶液25,m L,使用45,m L饱和碳酸钠溶液洗涤。同时,为高纯碳酸钠的工业化生产提供了理论依据和数据支撑。
This paper introduces a pilot test of the preparation of high purity sodium carbonate with heavy soda ash.The results indicated that product purity is higher using the Solvating-out Crystallization method,but the yield is low.This method is not suitable for mass production.While using ceramic membrane filtration,qualified products could also be obtained.The best process conditions of this method include：membrane pore size of 0.8,microns;100,g heavy soda ash processed by 25,m L 0.1,mol/L sodium hydroxide solution,and then washed with 45,m L saturated sodium carbonate solution.These results will provide theoretical foundation and data support for the industrial production of high purity sodium carbonate.
出处
《天津科技》
2015年第10期28-31,共4页
Tianjin Science & Technology
关键词
膜
溶析结晶法
碳酸钠
高纯
membrane
Solvating-out Crystallization
sodium carbonate
high purity
