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US 10,865,110 B2Granted
Compositions and processes for removing heavy metals from phosphoric acid solutions
AssigneeCytec Industries Inc.
InventorsLei Zhang, Xueping Qiu, Rajesh Raitani
Life of this patent
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Abstract
Processes for removing/recovering heavy metal ions in solutions containing phosphoric acid by adding reagents having at least one organothiophosphorus compound and at least one surfactant to the solution during the wet-process phosphoric acid production process to form heavy metal complexes, and separating the heavy metal complexes from the solution are provided herein.
Claims22
A process for removing heavy metal ions from a phosphoric acid solution containing said heavy metal ions, said process comprising
- adding an effective amount of a reagent comprising an organothiophosphorus compound and a surfactant to the phosphoric acid solution to form heavy metal complexes, and
- separating the heavy metal complexes from the phosphoric acid solution.
Dependencies are inferred from the claim text.