Grafted methylenediphosphonate ion exchange resins

Details Grafted methylenediphosphonate ion exchange resins Grafted methylenediphosphonate ion exchange resins

1995-02-06

1997-04-08

Zitomer, Fred

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Ion-exchange polymer or process of preparing

521 30, 521 32, 521 33, 525403, 525538, 526278, C08G 7904

Patent

active

056188510

ABSTRACT:
An ion exchange resin is disclosed that is comprised of an insoluble copolymer onto which are grafted pendent groups that provide 1.0 to about 10 mmol/g dry weight phosphorous. The pendent groups have the formula ##STR1## wherein R is hydrogen, a cation or mixtures thereof; and

REFERENCES:
patent: 5256808 (1993-10-01), Alexandratos
patent: 5281631 (1994-01-01), Horwitz et al.
patent: 5281636 (1994-01-01), Nambu et al.
Sundell et al., Reactive Polymers, 25:1-16 (1995).
Alexandratos et al., "Synthesis of a Novel Diphosphonate-based Ion Exchange Resin with Enhanced Metal Ion Selectivity" in Emerging Separation Technologies for Metals and Fuels, Lakshmanan et al., eds., The Minerals, Metals & Materials Society (1993) pp. 111-117.
Sundell et al., "Synthesis of Porous Polystyrene with Bis(Phosphonic Acid) Functionalized Surfaces," Polymer Preprints, 33:992-993 (1992).
Sundell et al., "Synthesis and Use as a Catalyst Support of Porous Polystyrene with Bis(phosphonic acid)-Functionalized Sufaces," Chem. Mater., 5:372-376 (1993).

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