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1. WO2000037535 - PROCESS FOR THE HYDROLYSIS OF ADIPONITRILE AND THE PRODUCTION OF NYLON 6,6 UTILIZING LOW CATALYST LEVELS

Publication Number WO/2000/037535
Publication Date 29.06.2000
International Application No. PCT/US1999/028239
International Filing Date 30.11.1999
Chapter 2 Demand Filed 10.07.2000
IPC
C08G 69/04 2006.01
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
69Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
02Polyamides derived from amino carboxylic acids or from polyamines and polycarboxylic acids
04Preparatory processes
C08G 69/28 2006.01
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
69Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
02Polyamides derived from amino carboxylic acids or from polyamines and polycarboxylic acids
26derived from polyamines and polycarboxylic acids
28Preparatory processes
CPC
C08G 69/04
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
69Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
02Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids
04Preparatory processes
C08G 69/28
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
69Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
02Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids
26derived from polyamines and polycarboxylic acids
28Preparatory processes
Applicants
  • E.I. DU PONT DE NEMOURS AND COMPANY [US]/[US]
Inventors
  • HAYES, Richard, Allen
  • MARKS, David, Neil
  • VAN EIJNDHOVEN, Maria de Jesus
Agents
  • STEVENSON, Robert, B.
Priority Data
09/217,79922.12.1998US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) PROCESS FOR THE HYDROLYSIS OF ADIPONITRILE AND THE PRODUCTION OF NYLON 6,6 UTILIZING LOW CATALYST LEVELS
(FR) PROCEDE D'HYDROLYSE D'ADIPONITRILE ET PRODUCTION DE NYLON 6,6 UTILISANT DE FAIBLES NIVEAUX DE CATALYSEUR
Abstract
(EN)
A process for the hydrolysis of a dinitrile (e.g., adiponitrile) utilizing from 0.1 to 500 mmoles of catalyst (e.g., a mixture of phosphorous acid and calcium hypophosphite) per mole of the dinitrile and in the presence of from 0.01 to 0.5 moles of a dicarboxylic acid cocatalyst (e.g., adipic acid) followed by addition of a diamine (e.g., hexamethylenediamine) and heating to produce polymerization. Such a process is particularly useful in the production of nylon 6,6 having a low BHMT content and improved melt stability.
(FR)
L'invention concerne un procédé d'hydrolyse d'un dinitrile (p. ex., adiponitrile) utilisant entre 0,1 et 500 mmoles de catalyseur (p.ex., un mélange d'acide phosphoreux et d'hypophosphite de calcium) par mole de dinitrile et en présence d'environ 0.01 à 0.5 moles d'un cocatalyseur d'acide dicarboxylique (p.ex., acide adipique) suivi de l'addition d'une diamine (p.ex., hexaméthylènediamine) et du chauffage en vue de la production de la polymérisation. Un tel procédé convient particulièrement à la production de nylon 6,6 présentant une faible teneur en BHMT et faisant preuve d'une stabilité améliorée à l'état fondu.
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