Process of recovering hexavalent chromium from chromium plating rinsing solution

Process of recovering hexavalent chromium from chromium plating rinsing solution

The process of recovering hexavalent chromium from chromium plating rinsing solution includes the following steps: coarse filtering, micro filtering and safety filtering the rinsing solution; and separating the rinsing solution with reverse osmosis membrane to obtain pure water and solute, concentra...

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Bibliographische Detailangaben
1. Verfasser: ZHONGPING,AI ZOU
Format: Patent
Sprache:eng
Schlagworte:
APPARATUS THEREFOR
CHEMISTRY
ELECTROFORMING
ELECTROLYTIC OR ELECTROPHORETIC PROCESSES
METALLURGY
PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTIONOF COATINGS
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Beschreibung
Zusammenfassung:The process of recovering hexavalent chromium from chromium plating rinsing solution includes the following steps: coarse filtering, micro filtering and safety filtering the rinsing solution; and separating the rinsing solution with reverse osmosis membrane to obtain pure water and solute, concentrating solute to obtain chromate anhydride containing hexavalent chromium. The pressure before coarse filtering is 0.1MPa-0.5MPa, that before the reverse osmosis membrane is 0.6MPa-4MPa and that in reverse washing is 0.2MPa-0.6MPa. The treating process of the present invention is environment friendly and high in economic benefit.