Selective complexing agent loaded graphitized carbon black and its application in palladium extraction

• Main Authors: LI YINKE, YANG BO, YANG XINZHOU, HU QIUFEN
• Format: Patent
• Language: Chinese; English
• Published: 27.06.2012
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; 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; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; 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; THEIR RELEVANT APPARATUS; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention relates to selective complexing agent loaded graphitized carbon black and an application of its solid-phase extraction column in extraction of enriched palladium. Granularity of the graphitized carbon black provided by the invention is 20-120 microns, and the complexing agent loaded on the graphitized carbon black is 4-hydroxynaphthalene-1-methylenerhodanine. The application is operated as follows: a palladium-containing solution passes through a selective complexing agent 4-hydroxynaphthalene-1-methylenerhodanine loaded graphitized carbon black solid-phase extraction column; palladium can react with the complexing agent loaded on the solid-phase extraction column to generate a stable complex which is adsorbed on the solid-phase extraction column; and when palladium on the solid-phase extraction column is enriched and saturated, 0.5-2% of thiourea is used as an eluant to elute the enriched palladium on the extraction column. The material provided by the invention is characterized by high palladi