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Ion Exchange Systems for Chromic Acid Recovery and Purification from Plating and Anodizing Operations
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English
Abstract
Chromic acid losses through dragout, bath dumps, and fume scrubber blowdown result in waste treatment expense, bath replacement, and environmental liabilities. Purification of the bath can eliminate bath dumping and improve performance by removing contaminates which are detrimental to the finishing operation. Closed loop recovery of rinsewaters (tied to scrubbers) can eliminate environmental liabilities and provide considerable savings. Ion exchange techniques are especially well suited to purification and recovery of chromic acid. In particular, a system which employs short resin columns and rapid operating cycles has been developed specifically for such applications.
Authors
Citation
Leatherdale, J. and Dejak, M., "Ion Exchange Systems for Chromic Acid Recovery and Purification from Plating and Anodizing Operations," SAE Technical Paper 910920, 1991, https://doi.org/10.4271/910920.Also In
References
- Knill, E.C. Chessin, H. “Contamination of Hexavalent Chromium Plating Baths” Plating and Surface Finishing 1986
- Knill, E.C. Chessin, H. Plating and Surface Finishing August 1986
- “Chemistry of Chromium Plating at a Glance” Plating and Surface Finishing May 1983
- Dejak, M. “Chromic Acid Purification By Ion Exchange” 1990
- Brown, C.J. “Chromic Acid Recovery by Reciprocating Flow Ion Exchange” 1980
- Veit, P.L. “The Evaporator - A Great Tool, but no free lunch” Metal Finishing November 1989
- Guffie, R.K. “Hard Chromium Plating” Products Finishing May 1988