Celanese International Corporation

Duc Hahn Nguyen

G Paull Torrence

Philippe J Kalck

Carole Marie Le Berre

Philippe Gilles Serp

Processes for the production of acetic acid by carbonylation of methanol and reactive derivatives thereof in a liquid phase reaction medium, wherein the reaction medium comprises a finite amount of water, a homogeneous catalyst, an alkyl halide promoter, and a catalyst stabilizer/co-promoter comprising an imidazolium cation RRIm+ as an iodide salt, wherein Rand Rare each independently a substituted or unsubstituted alkyl or cycloalkyl, with the proviso that Rand Rare not the same.

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Marseille, France

Duc Hahn Nguyen