Cobalt nickel hydroxide filter cake after-acid-dissolution liquid dechlorination method

• Main Authors: SUN NINGLEI, DONG AIGUO, DING SHURONG, LI SHAOLONG, ZHANG YANG, LU YEDA, YIN SHUYAN
• Format: Patent
• Language: English
• Published: 16.09.2015
• Subjects: CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; FERROUS OR NON-FERROUS ALLOYS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; 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

The invention discloses a cobalt nickel hydroxide filter cake after-acid-dissolution liquid dechlorination method, including: acquiring a cobalt nickel hydroxide filter cake after-acid-dissolution liquid; adding sodium hydroxide into the cobalt nickel hydroxide filter cake after-acid-dissolution liquid for precipitation of iron and aluminum and filtering to obtain a filtrate; using an organic solvent for extraction and chloride removal treatment of the filtrate, and separating the chlorine-containing after-organic-extraction liquid and the dechlorinated cobalt nickel hydroxide filter cake after-acid-dissolution liquid; performing reverse extraction regeneration processing on the chlorine-containing after-organic-extraction liquid and separating to obtain a back-extractant. According to the obalt nickel hydroxide filter cake after-acid-dissolution liquid dechlorination method, most of the chlorine contained in the cobalt nickel hydroxide filter cake after-acid-dissolution liquid can be effectively removed, the process is simple, cost is low, and the method is especially suitable for nickel wet smelting process.