Method for extracting sodium thiocyanate from HPF desulfurization waste solution

The application of the invention provides a method for extracting sodium thiocyanate from an HPF desulfurization waste solution, and relates to the technical field of extraction of sodium thiocyanate.The method comprises the following steps: (1) directly taking the HPF desulfurization waste solution...

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Hauptverfasser:	CHU ZHENGXIANG, ZHOU QING, CUI JIAN, GAO HAIBIAO, DENG BAICE
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	AMMONIA CHEMISTRY COMPOUNDS THEREOF CYANOGEN INORGANIC CHEMISTRY METALLURGY
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creator	CHU ZHENGXIANG ZHOU QING CUI JIAN GAO HAIBIAO DENG BAICE
description	The application of the invention provides a method for extracting sodium thiocyanate from an HPF desulfurization waste solution, and relates to the technical field of extraction of sodium thiocyanate.The method comprises the following steps: (1) directly taking the HPF desulfurization waste solution, decoloring, filtering, collecting a mother solution; (2) evaporating the collected solution at the reduced pressure, and concentrating to obtain a concentrated solution; (3) slowly adding an ethanol aqueous solution into the concentrated solution, cooling to 35-45 DEG C while stirring; (4) filtering, collecting a filtrate, evaporating at the reduced pressure, concentrating, cooling, crystalizing, centrifuging, separating to prepare the sodium thiocyanate. The method effectively solves the technical problems of high energy consumption, high requirement on separation equipment and the like in the prior art as the HPF desulfurization waste solution needs to be evaporated at the high temperature and centrifugally sep
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subjects	AMMONIA CHEMISTRY COMPOUNDS THEREOF CYANOGEN INORGANIC CHEMISTRY METALLURGY
title	Method for extracting sodium thiocyanate from HPF desulfurization waste solution
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