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- Separation of tantalum from columbium by the hydrofluoric acid-sulfuric acid-methyl isobutyl ketone system
- Recovering copper from mill tailings:selected studies
- Phosphoric acid by direct sulfuric acid digestion of Florida land-pebble matrix
- Continuous-circuit preparation of phosphoric acid from Florida phosphate matrix
- Acidulation of Florida phosphate matrix in a single-tank reactor
- Direct preparation of phosphoric acid from intermediate-grade western phosphatic shale