Selective removal of phosphates and chromates from contaminated

Details Selective removal of phosphates and chromates from contaminated Selective removal of phosphates and chromates from contaminated

1998-12-07

2000-10-24

Cintins, Ivars

Liquid purification or separation

Processes

Ion exchange or selective sorption

210683, 210684, 210906, 210913, C02F 142

Patent

active

061361992

ABSTRACT:
Phosphates and chromates are selectively removed from contaminated water by a new class of sorbent, referred to as a Polymeric Ligand Exchanger (PLE). The exchanger bed comprising a styrene-divinylbenzene or polymethacrylate matrix having an electrically neutral chelating functional group with nitrogen or oxygen donor atoms, and a Lewis-acid type metal cation, such as copper, bonded to the chelating functional group in a manner that the positive charges of the metal cation are not neutralized. PLEs are very selective toward phosphates and chromates, chemically stable, and also amenable to efficient regeneration.

REFERENCES:
patent: Re30066 (1979-08-01), Oberhofer
patent: 2208172 (1940-07-01), Urbain
patent: 3931003 (1976-01-01), Jorgensen
patent: 3948769 (1976-04-01), Dobbs
patent: 3961029 (1976-06-01), Senoo
patent: 4080290 (1978-03-01), Klantschi et al.
patent: 4230565 (1980-10-01), Donnert et al.
patent: 4734200 (1988-03-01), Wes Berry
patent: 4741832 (1988-05-01), Leonard
patent: 4747949 (1988-05-01), Barkeley
patent: 4806244 (1989-02-01), Guilhem
patent: 5618433 (1997-04-01), Tarbet et al.
Ramana, A. et al., "Removing Selenium(IV) and Arsenic(V) Oxyanions with Tailored Chelating Polymers", J. Environ. Eng., Sep. 1992, 118(5), 755-775 .

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