Chelating resins and method for their use in the extraction of m

Details Chelating resins and method for their use in the extraction of m Chelating resins and method for their use in the extraction of m

1991-12-23

1993-04-06

Schofer, Joseph L.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

521 30, 521 31, 521 32, 525153, 5253294, 5253299, 5253304, 525374, 525379, 525380, 525382, 525383, C08F 832

Patent

active

052004732

ABSTRACT:
For the preparation of hydrophilic polymer resins with functional groups on ligands, one reacts a resin which consists of units of formula I, in which R.sub.1 is hydrogen or an aliphatic residue, with a ligand in the presence of a coupling agent. The reaction is conducted in the presence of a competitive agent which is capable of reacting with the coupling agent at approximately the same rate as the amido group, to achieve a statistical limitation of the reaction of the coupling agent with the polymer. The competitive agent must not react with the resin.
The resin is used for the recovery of metal ions from effluents or natural or industrial residual waters.

REFERENCES:
patent: 4230828 (1980-10-01), Gaul, Jr.
patent: 4251410 (1981-02-01), Danner
patent: 4281086 (1981-07-01), Gaul, Jr.
patent: 4789695 (1988-12-01), Farrar

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