Method for reprocessing aqueous extract solutions obtained in th

Details Method for reprocessing aqueous extract solutions obtained in th Method for reprocessing aqueous extract solutions obtained in th

1996-05-20

1997-12-30

Hampton-Hightower, P.

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

Synthetic resins

Treating polymer containing material or treating a solid...

528310, 528323, 528481, 528499, C08F 600, C08G 6914

Patent

active

057032041

ABSTRACT:
The invention relates to a method for recycling (reprocessing) aqueous extract solutions obtained in the production of polyamides. The method for reprocessing the aqueous extract solutions obtained consists in that the aqueous extract solution is concentrated and polymerised, adding small amounts of dicarboxylic acid or polycarboxylic acid to the extract solution.

REFERENCES:
patent: 4053457 (1977-10-01), Cordes et al.
patent: 5077381 (1991-12-01), Dellinger
patent: 5218080 (1993-06-01), Dellinger

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