C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 51/48 (2006.01) C07C 53/08 (2006.01)
Patent
CA 2556899
An improvement of the methanol carbonylation process for manufacturing acetic acid is disclosed. Specifically disclosed is a method for removing permanganate reducing compounds ("PRC's") from the condensed light ends overhead stream, including (a) distilling at least a portion of the condensed light ends overhead to yield a PRC enriched second overhead stream; (b) extracting the second overhead stream with water and separating therefrom an aqueous stream containing PRC's; and (c) returning at least a portion of the extracted second overhead to the second distiller.
L'invention concerne l'amélioration du procédé de carbonylation de méthanol destiné à la production d'acide acétique. L'invention concerne notamment un procédé d'enlèvement de composés réducteurs du permanganate ("PRC's") du flux de tête de fractions légères condensé, ce procédé consistant (a) à distiller au moins une partie du produit de tête de fractions légères condensé pour obtenir un deuxième flux de tête enrichi en PRC; (b) à extraire le deuxième flux de tête avec de l'eau et à en séparer un flux aqueux contenant des composés PRC; et (c) à renvoyer au moins une partie du deuxième produit de tête extrait au deuxième distillateur.
Picard Wayne D.
Scates Mark O.
Talancon Jose J. Arturo
Trueba David A.
Zinobile Raymond J.
Celanese International Corporation
Smart & Biggar
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