PROCESS FOR PRODUCING A CONCENTRATED AQUEOUS SOLUTION OF A SALT OF A DIAMINE AND DICARBOXYLIC ACID

The present invention relates to a process for producing a highly concentrated aqueous solution of a salt of a diamine and dicarboxylic acid by using a pre-salt aqueous solution having a high concentration of diacid/diamine salt and an excess of dicarboxylic acid; and adding additional diamine to ob...

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Bibliographische Detailangaben
Hauptverfasser:	TERNISIEN, THOMAS, THIERRY, JEAN-FRANCOIS
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	CHEMISTRY COMPOSITIONS BASED THEREON MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP
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Beschreibung
Zusammenfassung:	The present invention relates to a process for producing a highly concentrated aqueous solution of a salt of a diamine and dicarboxylic acid by using a pre-salt aqueous solution having a high concentration of diacid/diamine salt and an excess of dicarboxylic acid; and adding additional diamine to obtain the final diacid/diamine solution. The final diacid/diamine salt solution obtained is suitable for the manufacture of a polyamide such as for example polyamide 66. La présente invention concerne un procédé de production d'une solution aqueuse hautement concentrée d'un sel d'une diamine et d'un acide dicarboxylique en utilisant une solution aqueuse de pré-sel ayant une concentration élevée en sel de diacide/diamine et un excès d'acide dicarboxylique; et en ajoutant une diamine supplémentaire pour obtenir la solution de diacide/diamine finale. La solution de sel de diacide/diamine finale obtenue est appropriée pour la fabrication d'un polyamide tel que par exemple le polyamide 6-6.