Extraction of metal residues from polymer cements

Details Extraction of metal residues from polymer cements Extraction of metal residues from polymer cements

1998-08-18

2000-11-28

Michl, Paul R.

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

Synthetic resins

Treating polymer containing material or treating a solid...

C08F 600

Patent

active

061537276

ABSTRACT:
There is provided a method of removing metal residues from a polymer cement, the method comprising polymerizing a monomer with a metal-based polymerization initiator to give a polymer cement having metal polymerization initiator residue; adding an organic-soluble acid having a pKa no greater than about 4.5 to the polymer cement, thereby forming an acid containing organic phase; mixing the organic phase with an aqueous phase containing a mineral acid; and recovering the polymer cement substantially free of metal residue.

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