Recovery of metal values from aqueous solutions and slurries

Details Recovery of metal values from aqueous solutions and slurries Recovery of metal values from aqueous solutions and slurries

2005-05-24

2005-05-24

Drodge, Joseph (Department: 1723)

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

C075S743000, C210S639000, C210S651000, C210S684000, C210S904000, C423S024000, C423S027000

Reexamination Certificate

active

06896808

ABSTRACT:
The invention generally relates to a process for the recovery or removal of metal species from a solution or slurry comprising the steps of: a) contacting the solution or slurry with a polymeric material, selected from the group consisting of a solid superhydrophilic polyurethane polymer containing a chelating and/or solvating agent, a water-insoluble polymeric chelating agent dispersed in a water-insoluble carrier solution, and a water-soluble polymeric chelating or co-ordinating agent to load the polymeric material with metal species wherein said polymeric material; b) separating the loaded polymeric material from the solution or slurry; and c) recovering or removing the metal from the polymeric material. There is also considered a polymeric material for use in the recovery of metal species from a solution or slurry, the polymeric material comprising a solid superhydrophilic polyurethane polymer containing a chelating or co-ordinating agent and/or a solvating agent.

REFERENCES:
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patent: 6242625 (2001-06-01), Kordosky
patent: 0 301 783 (1989-02-01), None
patent: 0355 045 (1995-05-01), None
Abstract “Gold Extracting Method by Low-Pressure Hot Acid Immersing Polyurethane Foam,” Patent No. CN1065684, publication date: Oct. 28, 1992, Inventors Gebo Xie, et al.

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