Method of controlling the quality of terephthalic acid

C - Chemistry – Metallurgy – 07 – C

Patent

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

Patent

CA 2228396

A method of controlling the quality of terephthalic acid comprises: detecting CO2 amount contained in non-condensing components in reaction waste gas discharged from a reactor having materials necessary for producing terephthalic acid; predicting the concentration of 4CBA in a product on the basis of the detected CO2 amount; and controlling reaction conditions so as to maintain the predicted concentration value of 4CBA in a suitable range.

Une méthode de contrôle de la qualité de l'acide téréphtalique comprend : la détection de la quantité de CO2 contenue dans les constituants qui ne condensent pas dans les effluents gazeux de la réaction à la sortie d'un réacteur contenant les réactifs nécessaires à la fabrication d'acide téréphtalique; l'établissement de la concentration prévue de 4CBA dans un produit en fonction de la quantité de CO2 détectée; et le réglage des conditions réactionnelles de manière à maintenir dans une étendue appropriée la valeur de concentration prévue de 4CBA.

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