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Letter 41054 Titanium Tungsten Etch and Disposal [New Jersey]June 8, 2006 We are going to be developing a program for etching a sputtered layer of TiW from our ceramic using 30% hydogen peroxide. I had read that the H2O2 can be neutralized by dropping the concentration to 5%, then adding a 50% solution of sodium metabisulfite and water. It could then be discharged down the drain with 50 times its volume with water. Does anybody have any experiance with the disposal of H2O2 that also contains TiW? Any recommendations would be greatly appreciated. Thanks! Chris Martorano
June 9, 2006 Hello, Chris. There are two likely problems with your plan from the get-go. First, your wastewater is probably categorically regulated; that means you can't dispose of it without permits even if it is innocuous. Second, dilution of industrial wastes as a treatment scheme is usually forbidden by law. I would suggest locating an industrial waste treatment consultant or a knowledgable supplier before you go much further.
June 9, 2006 I do not remember if either Ti or W are regulated. James Watts
July 13, 2006 You would have something else in there but H2O2 to strip the TiW
which you havent mentioned. As far as the peroxide goes--
Dear Reader: please choose what you want to do--
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