Method for preparing high-purity sodium carbonate and ammonium chloride from sodium chloride waste salt

The invention provides a method for preparing high-purity sodium carbonate and ammonium chloride from sodium chloride waste salt, and relates to the technical field of sodium chloride waste salt treatment. Generating mixed crystals of sodium bicarbonate and ammonium chloride on the premise of not ad...

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Bibliographische Detailangaben
Hauptverfasser:	FAN BINGQIANG, SHEN CHANGSHUAI, LIU YINLING, CHEN PEISONG, ZHANG YANG, ZHENG SHILI, ZHANG HEDONG, ZHANG JING
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	AMMONIA CHEMISTRY COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM,RUBIDIUM, CAESIUM, OR FRANCIUM COMPOUNDS THEREOF CYANOGEN INORGANIC CHEMISTRY METALLURGY
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Beschreibung
Zusammenfassung:	The invention provides a method for preparing high-purity sodium carbonate and ammonium chloride from sodium chloride waste salt, and relates to the technical field of sodium chloride waste salt treatment. Generating mixed crystals of sodium bicarbonate and ammonium chloride on the premise of not adding other substances to decompose bicarbonate radicals, carrying out primary cooling crystallization on the salting-out crystallization mother liquor, and dissolving ammonium chloride in the mixed crystals by utilizing the primary cooling crystallization mother liquor; according to the method, high-purity sodium carbonate and ammonium chloride can be prepared, the obtained product is high in purity, the total alkali content of the sodium carbonate product is 99.0% or above and meets the requirements of industrial sodium carbonate type II qualified products in GB/T 210-2022, and the mass percentage of the ammonium chloride product is 99% or above and meets the requirements of industrial ammonium chloride qualified