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US 4,353,877 AGranted
Extraction process
OwnerJohn S. Rendallinventor
Life of this patent
Estimating the term…
Abstract
A process is described for extracting phosphoric acid and metal values, such as uranium, from phosphate rock using hydrochloric acid and independently extracting the phosphoric acid and metal values from a slurry of the acidulated rock.
Claims12
A process for the extraction of phosphoric acid and metal values from phosphate rock comprising:
- acidulating the phosphate rock with hydrochloric acid to convert the phosphate of the rock into phosphoric acid,
- contacting a slurry of the acidulated rock with selective extractants for phosphoric acid and metal values contained in the slurry;
- removing the extractants substantially independently of the solids of the slurry;
- and
- separately recovering the phosphoric acid and metal values.
2 more elements
A process for the extraction of phosphoric acid and uranium values from phosphate rock comprising:
- acidulating the phosphate rock with hydrochloric acid to convert the phosphate of the rock into phosphoric acid;
- contacting a slurry of the acidulated rock with methyl isobutyl ketone or isobutyl alcohol as extractant for phosphoric acid and a lightweight particulate ion exchange resin capable of capturing uranyl ions by passing the slurry and extractants in countercurrent in substantially separate phases, while causing the slurry to be repeatedly showered through the extractant stream;
- removing the extractants substantially independently of the solids of the slurry;
- and
- recovering the phosphoric acid and uranium values.
2 more elements
Dependencies are inferred from the claim text.