Electrolytic regeneration of acid cupric chloride printed circuit board etchant. Quarterly report No. 3, February 1, 1996--April 30, 1996

We are abandoning study of porous polyolefins as regenerator cell separators for now since only radiation grafting seems a suitable technique to make them permanently hydrophilic, and the experts who could do this work need more financial incentive than our application generates. A vendor with a new, moderate cost porous ceramic which can be used for our separators was found though. We designed and built a demonstration scale oxygen ingress compensator cell and are adding it to our pre-prototype regeneration system; actual operation awaits completion of tests on the required proton-selective T&G Corp. membrane. Prototype flow demands require pressurized cell operation and modifications being made to the pre-prototype plating cell will allow testing of design concepts to handle that. Efforts towards an alumina product are discussed