Demonstration of Technology to Recycle Chromic Acid Etchants At Gould, Inc.
Proc 4th Recycling World Cong & Expo New Orleans Louisiana 1982 Apr; :M/3/5/1-m/3/5/13
The process research unit for the regeneration and recycling of chronic acid-sulfuric acid etching solutions developed by the Bureau of Mines was demonstrated in cooperation with Gould, Inc., in Niles, Illinois. The process research unit continuously regenerated and recycled etching solution from a brass etching circuit during normal production throughput for 17 days. Evaluation of the data obtained during the demonstration shows that the etching solution was maintained at an acceptable level of performance, consumption of sodium dichromate was reduced by 68 pct, generation of waste was reduced by 76 pct, and the cost of the operation was reduced by 70 pct.
Proc. 4th Recycling World Cong. & Expo, New Orleans, Louisiana, Apr. 5-7, 1982, PP. M/3/5/1-m/3/5/13