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- W231493887 abstract "The Bureau of Mines investigated two alternative methods for treating a zirconium-bearing chloride-sulfate strip liquor to obtain reactor-grade ZrO2. One method involves neutralization with NH3 and the other hydrothermal precipitation. The strip liquor was derived from zircon sand by a Bureau of Mines method for separating zirconium and hafnium via solvent extraction with a tertiary amine. Neutralization with NH3 to precipitate hydrous zirconium oxide required 0.9 to 1.1 g NH3 per gram of zirconium. The NH3 can be recovered for recycle. ZrO2 that met reactor-grade specifications was produced by precipitation with NH3. Hydrothermal precipitation of ZrO2 from strip liquor required that the solution be maintained at 260C and 680 psi for 10 min and in a noncorrodible pressure vessel. In bench-scale experiments both methods gave zirconium recoveries greater than 99 pct." @default.
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- W231493887 date "1984-02-01" @default.
- W231493887 modified "2023-09-22" @default.
- W231493887 title "Investigation of methods for producing reactor-grade zirconium oxide from a zirconium-bearing chloride-sulfate strip liquor solution. Report of investigations/1984" @default.
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