Cation-exchange resins having cross-linked vinyl aromatic polyme

Details Cation-exchange resins having cross-linked vinyl aromatic polyme Cation-exchange resins having cross-linked vinyl aromatic polyme

1975-07-23

1977-01-11

Schofer, Joseph L.

Liquid purification or separation

With alarm, indicator, register, recorder, signal or...

Responsive to fluid flow

75101BE, 260 22R, 526 27, C08F21208, C08F 840, C22B 300

Patent

active

040025640

ABSTRACT:
Described is an ion exchange resin prepared from a cross-linked vinyl-aromatic polymer carrying recurring active units of the formula --CH.sub.2 NHRPO(OH).sub.2 wherein R is a lower alkylene radical. Such resins are useful in selectively removing metal ions from solutions, and may be prepared, e.g., by reaction of a primary amino-substituted cross-linked copolymer with a phosphorus trihalide and a simple (C.sub.1 -C.sub.3) aldehyde.

REFERENCES:
patent: 3001868 (1961-09-01), Avestou et al.
patent: 3257479 (1966-06-01), Irani

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