Process for extracting metal residue from poly(ether ketone keto

Details Process for extracting metal residue from poly(ether ketone keto Process for extracting metal residue from poly(ether ketone keto

1989-02-24

1991-05-21

Foelak, Morton

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

Synthetic resins

Treating polymer containing material or treating a solid...

528125, 528126, 528486, 528492, 528493, C08G 6700

Patent

active

050176854

ABSTRACT:
Metal residues are extracted from poly(ether ketone ketones) with aliphatic alpha-hydroxycarboxylic acids or aromatic ortho-hydroxycarboxylic acids in a liquid phase, either neat or in an aqueous or a nonaqueous solution. Extraction of metal residues, which usually derive from the catalysts used in the preparation of poly(ether ketone ketones), improves both the color and the thermal stability of these polymers.

REFERENCES:
patent: 4611033 (1986-09-01), Maresca
Instability Constants of Complex Compounds, K. B. Yatsimirski et al., 1960.

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