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Discussion on advantages and disadvantages of ammonium alkali and associated alkali technology and its countermeasures,and how to switch between two technologies

WANG Rui-qing(Qingdao Industrial Soda Ash Co.,Ltd.,Qingdao 266043,China)  
Considering the product market and environmental protection,the advantages and disadvantages of the ammonium alkali technology and associated alkali technology were analyzed.On the basis of analyzing the phase diagram,a method that switches between the ammonium alkali and associated alkali technology was carried out without modifying the whole set of the original equipment with the ammonium alkali technology,namely the filtering section of ammonium alkali technology is followed by the ammonium adsorption section,then the ammonium mother liquid is used to make ammonium chloride through the ice machine cooling section.The new process makes the switch between the ammonium alkali and associated alkali technology possible and owns the advantages of the two technologies.This method ensures the long-term development for the sodium carbonate industry.
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