Process for the production of purified terephthalic acid

Details Process for the production of purified terephthalic acid Process for the production of purified terephthalic acid

C - Chemistry, Metallurgy

07

C

C07C 51/43 (2006.01) C07C 51/265 (2006.01) C07C 63/26 (2006.01)

Patent

CA 2417691

Disclosed is a process for the production of terephthalic acid by a plurality of process steps including the catalyst oxidation of a dialkylbenzene compound, a second oxidation, a hydrogenation of the product of the second oxidation, and crystallization of the hydrogenation terephthalic acid using a plurality of series-connected crystallizers.

La présente invention concerne un procédé de production de l'acide téréphtalique comportant plusieurs étapes comprenant une étape d'oxydation catalytique d'un composé de dialkylbenzène, une deuxième étape d'oxydation, une étape d'hydrogénation du produit de la deuxième oxydation, et la cristallisation de l'acide téréphtalique obtenu de l'hydrogénation au moyen de cristallisoirs connectés en série.

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