Divided Electrochemical Cell and Low Cost High Purity Hydride Gas Production Process
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United States of America Patent
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Dec 20, 2012
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Dec 20, 2007
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Abstract
This invention is an apparatus and a method for continuously generating a hydride gas of M1 which is substantially free of oxygen in a divided electrochemical cell. An impermeable partition or a combination of an impermeable partition and a porous diaphragm can be used to divide the electrochemical cell. The divided electrochemical cell has an anode chamber and a cathode chamber, wherein the cathode chamber has a cathode comprising M1, the anode chamber has an anode comprising M2 and is capable of generating oxygen, an aqueous electrolyte solution comprising a hydroxide M3OH partially filling the divided electrochemical cell. Hydride gas generated in the cathode chamber and oxygen generated in the anode chamber are removed through independent outlets. M1 can be selenium, phosphorous, silicon, metal or metal alloy, M2 is metal or metal alloy suitable for anonic oxygen generation, and M3 is NH4 or an alkali or alkaline earth metal.
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