Derivatives of polyethers and of pentacyclic heterocycles, their

Details Derivatives of polyethers and of pentacyclic heterocycles, their Derivatives of polyethers and of pentacyclic heterocycles, their

1996-08-20

1998-11-03

Schofer, Joseph L.

Liquid purification or separation

Processes

Ion exchange or selective sorption

526256, 526258, 526333, 210912, C02F 162, C08F12806, C08F12606, C08F11612

Patent

active

058303626

ABSTRACT:
It concerns a monomer, a polymer obtained from the monomer and a process for obtaining the said polymer. The monomer consists of a polyether containing at least 3 ether units and pyrrole or thiophene units bonded to the ends of the chains of this polyether via, for each of these heterocycic compounds, either their carbon atoms in the 3,3'-positions of their heterocycles or, as regards more particularly the pyrrole groups, via their respective nitrogen atoms, the 2- and 2'-positions of these heterocycles being, however, free of all substitutions or, at the very most, substituted by easily removable groups (protective groups, for example).
Application to the purification and recovery of metal ions such as radioactive silver.

REFERENCES:
patent: 5569729 (1996-10-01), Leclerc

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