Gallium Arsenide Recycle Chemistry and Metallurgy
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While use of GaAs in electronics is growing rapidly and may approach            10% of all integrated circuits by 1990, efficient and environmentally           satisfactory methods for recovering gallium, a rare metal in nature,            from process scrap do not exist.  Handling of arsenic, a toxic                  substance and expected carcinogen in minute amounts, is a problem both          with respect to workplace and environmental levels of arsenic                   contamination.  Research will be conducted into methods of recovering           fallium from scrap while isolating arsenic safely.  Primary emphasis            will be on a smelting separation with arsenic collected in an alloy             collector and gallium oxidized into a soda ash slag.  Results from this         approach will be compared with direct hydrometallurgical methods:               leaching, solvent extraction, and precipitation.
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{'Code': '5371', 'Text': 'SBIR Phase I'}
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