Lei Zhangbo Zhang

US Patent:

20200048733, Feb 13, 2020

Filed:

Jul 1, 2019

Appl. No.:

16/458905

Inventors:

- Princeton NJ, US
Matthew Dean Soderstrom - Mesa AZ, US
Adam James Fischmann - Victoria, AU
Michael Moser - Fairfield CT, US
Lei Zhang - Stamford CT, US

Assignee:

Cytec Industries Inc. - Princeton NJ

International Classification:

C22B 7/00

Abstract:

A hydrometallurgical solvent extraction method includes mixing an aqueous metal ion solution with an organic solution of metal extraction reagent to form a mixture, and allowing the aqueous metal ion solution and organic solution to phase separate from the mixture; wherein prior to mixing the aqueous metal ion solution and the organic solution, a water-soluble or water-dispersible polymer comprising pendant sulfonic acid or sulfonate salt groups selected from the group consisting of sulfonated polystyrene; an addition polymer including at least one of styrene-4-sulfonic acid and 2-acrylamido-2-methylpropane sulfonic acid; naphthalene sulfonic acid-formaldehyde condensate; lignosulfonate; salts thereof; and mixtures thereof, is added to the aqueous metal ion solution, the organic solution, or to both the aqueous metal ion solution and the organic solution. The water-soluble or water-dispersible polymer can also be added simultaneously with or after mixing of the aqueous metal ion solution and the organic solution.