C - Chemistry – Metallurgy – 08 – J
Patent
C - Chemistry, Metallurgy
08
J
C08J 11/06 (2006.01) C01C 1/02 (2006.01) C02F 1/04 (2006.01) C08G 69/16 (2006.01) C08G 69/28 (2006.01) C08J 11/02 (2006.01)
Patent
CA 2565503
The invention relates to a method for the distillative separation of ammonia and water from mixtures arising during the production of polyamides, said mixture containing a lactam and/or diamines and, optionally, an aminonitrile and/or dinitrile in addition to cyclopentanones as foreign substances. Said method consists of two steps: 1) the mixture is distilled at 11 - 35 bars, resulting in the production of water, ammonia and cyclopentanone as overhead products (K1), and water, lactam and/or diamines and, optionally, aminonitrile and/or dinitrile, as base products (S1), and 2) K1 is distilled at 11 - 35 bars, resulting in the production of ammonia and cyclopentanone as an overhead product, and water as a base product (S2).
L'invention concerne un procédé de séparation distillative d'ammoniac et d'eau dans des mélanges produits lors de la fabrication de polyamides, contenant un lactame et/ou des diamines et éventuellement un aminonitrile et/ou dinitrile et cyclopentanone en tant qu'impureté. Ledit procédé comporte deux étapes: 1) distillation du mélange sous 11 à 35 bar de manière à obtenir de l'eau, de l'ammoniac et cyclopentanone en tant que produits de haut de colonne (K1), et de l'eau, le lactame et/ou les diamines et éventuellement l'aminonitrile et/ou le dinitrile en tant que produits de bas de colonne (S1); et 2) distillation de (K1) sous 11 à 35 bar de manière à obtenir de l'ammoniac et cyclopentanone en tant que produits de haut de colonne (K2), et de l'eau en tant que produit de bas de colonne (S2).
Assmann Jens
Deininger Juergen
Demeter Juergen
Kory Gad
Loening Jan-Martin
Basf Aktiengesellschaft
Robic
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