A PURIFICATION PROCESS OF CRUDE TEREPHTALIC ACID IN A POST OXIDATION ZONE BY THE ADDITION OF STEAM
The present invention relates to a process for heating a secondary oxidizer with steam. More specifically, the present invention relates to a process for heating a secondary oxidizer with steam in a process for the production of a crystallized product. A process to produce a crystallized product com...
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Main Authors | , , , , |
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Format | Patent |
Language | English French |
Published |
02.12.2004
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Edition | 7 |
Subjects | |
Online Access | Get full text |
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Abstract | The present invention relates to a process for heating a secondary oxidizer with steam. More specifically, the present invention relates to a process for heating a secondary oxidizer with steam in a process for the production of a crystallized product. A process to produce a crystallized product comprises the following steps (a) oxidizing in an primary oxidation zone an aromatic feedstock to produce a crude carboxylic acid slurry; (b) oxidizing said crude carboxylic acid slurry in a post oxidation zone in the presence of steam to form a post oxidation product; (c) purifying said post oxidation product to a decolorized post oxidation product; and (d) crystallizing in a crystallization zone said post oxidation product to form a crystallized product.
L'invention concerne un procédé de chauffage à la vapeur d'un oxydant secondaire. L'invention porte plus spécifiquement sur un procédé de chauffage à la vapeur d'un oxydant secondaire dans un procédé de production d'un produit cristallisé. Un procédé de production d'un produit cristallisé consiste à: (a) oxyder dans une zone d'oxydation primaire une charge aromatique pour produire une suspension épaisse d'acide carboxylique cru; (b) oxyder ladite suspension épaisse d'acide carboxylique dans une zone de post-oxydation en présence de vapeur pour former un produit de post-oxydation; (c) purifier ledit produit de post-oxydation pour produire un produit de post-oxydation décoloré; et (c) cristalliser dans une zone de cristallisation ledit produit de post-oxydation pour former un produit cristallisé. |
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AbstractList | The present invention relates to a process for heating a secondary oxidizer with steam. More specifically, the present invention relates to a process for heating a secondary oxidizer with steam in a process for the production of a crystallized product. A process to produce a crystallized product comprises the following steps (a) oxidizing in an primary oxidation zone an aromatic feedstock to produce a crude carboxylic acid slurry; (b) oxidizing said crude carboxylic acid slurry in a post oxidation zone in the presence of steam to form a post oxidation product; (c) purifying said post oxidation product to a decolorized post oxidation product; and (d) crystallizing in a crystallization zone said post oxidation product to form a crystallized product.
L'invention concerne un procédé de chauffage à la vapeur d'un oxydant secondaire. L'invention porte plus spécifiquement sur un procédé de chauffage à la vapeur d'un oxydant secondaire dans un procédé de production d'un produit cristallisé. Un procédé de production d'un produit cristallisé consiste à: (a) oxyder dans une zone d'oxydation primaire une charge aromatique pour produire une suspension épaisse d'acide carboxylique cru; (b) oxyder ladite suspension épaisse d'acide carboxylique dans une zone de post-oxydation en présence de vapeur pour former un produit de post-oxydation; (c) purifier ledit produit de post-oxydation pour produire un produit de post-oxydation décoloré; et (c) cristalliser dans une zone de cristallisation ledit produit de post-oxydation pour former un produit cristallisé. |
Author | WOODRUFF, THOMAS, EARL LIN, ROBERT DE VREEDE, MARCEL SLUIJMERS, JOHANNES, WILHELMUS DE BOER, MARTI |
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DocumentTitleAlternate | PROCEDE DE PURIFICATION D'ACIDE TEREPHTALIQUE CRU DANS UNE ZONE DE POST-OXYDATION PAR L'ADDITION DE VAPEUR |
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Snippet | The present invention relates to a process for heating a secondary oxidizer with steam. More specifically, the present invention relates to a process for... |
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Title | A PURIFICATION PROCESS OF CRUDE TEREPHTALIC ACID IN A POST OXIDATION ZONE BY THE ADDITION OF STEAM |
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