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

1995-06-07

1997-02-25

Schofer, Joseph L.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526258, 526333, 205317, 21050028, C08F12806, C08F12606, C08F11612, C25D 902, B01D 3900

Patent

active

056059930

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: 5200041 (1993-04-01), Simonet et al.

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