METHOD FOR PREPARING CALCIUM MOLYBDATE

FIELD: inorganic chemistry, chemical technology. ^ SUBSTANCE: method for preparing calcium molybdate involves treatment of the parent potassium molybdate solution with calcium nitrate taken in the stoichiometrically necessary amount and with addition of nitric acid wherein its mass ratio to potassiu...

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Hauptverfasser:	VODOP'JANOV ADRIAN GEORGIEVICH, KOZHEVNIKOV GEORGIJ NIKOLAEVICH, SITDIKOV FARIT GABDULKHANOVICH
Format:	Patent
Sprache:	eng ; rus
Schlagworte:	CHEMISTRY CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F FERROUS OR NON-FERROUS ALLOYS GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS INORGANIC CHEMISTRY METALLURGY PRETREATMENT OF RAW MATERIALS PRODUCTION AND REFINING OF METALS TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE TREATMENT OF ALLOYS OR NON-FERROUS METALS TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Beschreibung
Zusammenfassung:	FIELD: inorganic chemistry, chemical technology. ^ SUBSTANCE: method for preparing calcium molybdate involves treatment of the parent potassium molybdate solution with calcium nitrate taken in the stoichiometrically necessary amount and with addition of nitric acid wherein its mass ratio to potassium carbonate containing in the parent solution is 0.90-0.96. Invention provides the extraction degree of molybdenum-containing solutions up to 99.2% and to obtain calcium molybdate without formation of waste. Invention can be used in hydrometallurgy of rare metals in processing molybdenum-containing solutions. ^ EFFECT: improved preparing method. ^ 1 tbl