Preparation method of alkali metal hexafluorophosphate

The invention relates to a preparation method of alkali metal hexafluorophosphate, and belongs to the field of preparation of halogen-containing phosphate. The method comprises the following steps: 1) mixing a fluoride solid of corresponding alkali metal into a synthetic raw material solution, and d...

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Hauptverfasser:	NING YANSHENG, NING YONG, GUO ZHIFAN, GUO XIFENG, GUO YINTAO
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	CHEMISTRY COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM,RUBIDIUM, CAESIUM, OR FRANCIUM INORGANIC CHEMISTRY METALLURGY
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creator	NING YANSHENG NING YONG GUO ZHIFAN GUO XIFENG GUO YINTAO
description	The invention relates to a preparation method of alkali metal hexafluorophosphate, and belongs to the field of preparation of halogen-containing phosphate. The method comprises the following steps: 1) mixing a fluoride solid of corresponding alkali metal into a synthetic raw material solution, and dispersing to obtain a mixed dispersion system; the main component of the synthetic raw material solution is an anhydrous hydrogen fluoride solution in which alkali metal hexafluorophosphate is dissolved; 2) introducing phosphorus pentafluoride gas into the mixed dispersion system, simultaneously adding an anhydrous hydrogen fluoride solution of fluoride of corresponding alkali metal, reacting and crystallizing at the temperature not higher than the boiling point of anhydrous hydrogen fluoride, and separating out alkali metal hexafluorophosphate crystals; the mass concentration of the alkali metal fluoride in the anhydrous hydrogen fluoride solution of the alkali metal fluoride is 90-100% of the saturation concentra
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subjects	CHEMISTRY COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM,RUBIDIUM, CAESIUM, OR FRANCIUM INORGANIC CHEMISTRY METALLURGY
title	Preparation method of alkali metal hexafluorophosphate
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