PROCESS FOR PRODUCING ELECTROLYTIC CHROME

FIELD: production of electrolytic chrome used in metallurgy for melting special alloys having no iron. ^ SUBSTANCE: process for producing electrolytic chrome by continuous method comprises steps of preparing feed solution being almost saturated and having mole relation of chrome sulfates and ammoniu...

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Main Authors LETSKIKH E.S, TKACHEV K.V, LASYCHENKOV JU.JA, SOLOSHENKO A.A, KRAVCHENKO G.A, PLYSHEVSKIJ JU.S
Format Patent
LanguageEnglish
Russian
Published 10.03.2005
Edition7
Subjects
APPARATUS THEREFOR
CHEMISTRY
CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS
ELECTROLYTIC OR ELECTROPHORETIC PROCESSES
GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC
GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS
METALLURGY
PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY ORREFINING OF METALS
TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE
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Summary:FIELD: production of electrolytic chrome used in metallurgy for melting special alloys having no iron. ^ SUBSTANCE: process for producing electrolytic chrome by continuous method comprises steps of preparing feed solution being almost saturated and having mole relation of chrome sulfates and ammonium sulfates equal approximately to equimolar one; supplying it to cathode space of diaphragm electrolyzer; performing electrolysis and receiving waste catholyte and anolyte; using solution containing chrome (III) sulfates and chrome (II) sulfates, ammonium sulfate and in addition chrome (III) formiate as feed solution; preparing such feed solution by adding chromic acid into waste anolyte; reducing chrome (IV) to chrome (III) with use of organic reducing agent at temperature not exceeding 70C and then mixing received solution with waste catholyte. Sugar, glucose, molasses, starch, Formalin, preferably formaldehyde as organic reducing agent. Electrolysis is realized at density of cathode electric current 7.6 -10 A/dm2, temperature 55 -56C and pH of catholyte 2.41 -2.6. ^ EFFECT: reduced cost price, improved quality of product, simplified technique for preparing feed solution from chrome-containing raw material due to elimination of several stages of process, lowered content of iron impurity in ready product, decreased power consumption for electrolysis. ^ 3 cl, 1 tbl, 9 ex
Bibliography:Application Number: RU20030100729