Simultaneous production of dicarboxylic acids and diamines...

C - Chemistry – Metallurgy – 07 – C

Patent

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C07C 55/02 (2006.01) B01D 61/44 (2006.01) C07C 27/00 (2006.01) C07C 51/02 (2006.01) C07C 51/06 (2006.01) C07C 209/62 (2006.01) C07C 211/09 (2006.01) C08G 69/48 (2006.01) C25B 3/00 (2006.01)

Patent

CA 2138154

Disclosed is a method for the simultaneous preparation of dicarboxylic acids and diamines from (a) polymers based on polyamides made by reacting dicarboxylic acids or derivatives thereof with diamines or (b) compounds containing essentially such polymers by decomposing these polymers into their constituent monomers by treating the polymers or compounds with a base and subsequently converting electrochemically the dicarboxylic-acid salts thus produced into the corresponding dicarboxylic acids and bases.

Procédé de production simultanée d'acides dicarboxyliques et de diamines à partir (a) de polymérisats à base de polyamides résultant de la réaction d'acides dicarboxyliques ou de leurs dérivés avec des diamines, ou (b) de matières renfermant essentiellement de tels polymérisats, par décomposition de ces polymérisats en leurs constituants monomères, consistant à traiter ces polymérisats ou ces matières avec une base, puis à transformer, par voie électrochimique, les sels d'acides dicarboxyliques ainsi produits en acides dicarboxyliques et bases correspondants.

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