Constant compositioin recycle of nylon 6 polymerization wash wat

Details Constant compositioin recycle of nylon 6 polymerization wash wat Constant compositioin recycle of nylon 6 polymerization wash wat

1990-06-01

1991-12-31

Anderson, Harold D.

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

Synthetic resins

From carboxylic acid or derivative thereof

526 67, 526 70, 528481, 528499, C08G 6916

Patent

active

050773810

ABSTRACT:
A process for preparing polyamides of substantially constant cyclic dimer concentration from amide monomers includes extracting unreacted amide monomers and oligomers, reducing the oligomer concentration relative to the concentration of total extractants and then returning the extract to the reaction vessel in substantially the same total proportion as extracted.

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Maan, Dr. Ir. C. J., "Manufacture of Nylon 6 Chips", Fundamentals of Nylon 6 Yarn Manufacture in the Aku-Group, vol. II, 1965.
Mertel, Strauss, Heilmann, Holy, Taeger, Wiltzer and Luasmann, "Process to Obtain Polyamide-6 Chips from Concentrated Extract Waters of Polyamide-6", East German Patent 213936 (Translation), Jul. 8, 1985.

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