Process for recycling amino-carboxylic acid waste materials into

Details Process for recycling amino-carboxylic acid waste materials into Process for recycling amino-carboxylic acid waste materials into

1994-11-07

1996-10-15

Geist, Gary

Organic compounds -- part of the class 532-570 series

Organic compounds

Fatty compounds having an acid moiety which contains the...

554 68, 554 70, 554177, 554179, C07C23100

Patent

active

055655904

ABSTRACT:
This invention relates to a process for recycling waste material selected from amino-carboxylic acid oligomers or polymers and amido-carboxylic acid oligomers or polymers into amido-carboxylic acids. A mixture containing water, an oligomeric or polymeric waste material, and a carboxylic acid is heated. The mixture is cooled to obtain a two phase system containing an aqueous phase and an organic phase which are separated. Carboxylic acids, unreacted starting materials, and the monomeric amido-carboxylic acid product are distilled from the organic phase. The remaining solid residue composed of high boiling oligomeric amino-carboxylic acids is recycled into Step (A).

REFERENCES:
patent: 2453234 (1948-11-01), Koch
patent: 2956068 (1960-10-01), Dohr et al.
patent: 4605762 (1986-08-01), Mandoki
patent: 5169870 (1992-12-01), Corbin et al.
Kusunase et al., Chemical Abstracts, vol. 82, No. 10, 1975, p. 83, 591565.
Indian Journal of Fibre & Textile Research, vol. 16, Mar. 1991, pp. 46-51, India.

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