Investigation into the Reasons for and Solution to the Reduced Capacity of the Electroplating Rinse Water Demineralization System at Tinker AFB, Oklahoma.
Final rept. Jun 73-Jun 74,
AIR FORCE WEAPONS LAB KIRTLAND AFB N MEX
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Laboratory scale investigations were conducted to determine why the operating capacity of the ion exchange demineralization system utilized to recycle electroplating rinse waters at Oklahoma City Air Material Area, Tinker Air Force Base, Oklahoma had decreased by over 50 in approximately 18 months of operation. Total capacity and continuous flow experiments revealed irreversible absorption of trivalent metals on the cation resin irreversible exchange, by normal regeneration techniques, of para nitrobenzene, sulfonic acid on the anion resin and oxidation of the strong base functional groups. Physical plugging of the ion exchange resins from sediment in the process water and calcium sulfate precipitation were identified as contributing to the reduced capacity. Based on laboratory results recommendations are made to change the cation regenerant from sulfuric acid to hydrochloric acid and to periodically regenerate the anion resin with caustized brine. Other recommendations are made concerning system operation. Author
- Industrial Chemistry and Chemical Processing
- Civil Engineering