Methanol carbonylation with aldehyde removal

C - Chemistry – Metallurgy – 07 – C

Patent

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Details

C07C 51/12 (2006.01) C07C 51/43 (2006.01) C07C 51/44 (2006.01) C07C 51/48 (2006.01) C07C 53/08 (2006.01)

Patent

CA 2742617

Methanol carbonylation with improved aldehyde removal includes: (a) scrubbing light ends and aldehyde impurity from vent gas with an absorber solvent; (b) stripping absorbed light ends and aldehyde impurity from the absorber solvent to provide a vent-recovered light ends stream; (c) purifying the vent-recovered light ends stream to remove aldehyde impurity; and (d) recycling purified light ends from the vent-recovered light ends stream to the production system.

L'invention concerne la carbonylation du méthanol avec élimination améliorée des aldéhydes qui comporte les étapes suivantes : (a) épuration des fractions légères et des impuretés constituées par les aldéhydes du gaz évacué à l'aide d'un solvant absorbant; (b) extraction des fractions légères absorbées et des impuretés constituées par les aldéhydes du solvant absorbant pour fournir un flux de fractions légères récupérées du gaz évacué; (c) purifier les fractions légères récupérées du gaz évacué pour éliminer les impuretés constituées par les aldéhydes; et (d) recycler dans le système de production les fractions légères purifiées provenant du flux de fractions légères récupéré du gaz évacué.

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