597502 A method of purifying acetic acid containing terpene and terpenoid impurities, provided that the acetic acid is not glacial acetic acid, comprising: (a) combining acetic acid containing terpene and terpenoid impurities, provided that the acetic acid is not substantially dry, water and a suitable organic solvent, which is substantially immiscible with acetic acid and water, to form a separating composite extraction medium wherein the weight ratio of acetic acid: water is at least 1: 1, and...

Disclosed is an apparatus for producing acetic acid, said apparatus comprising: (a) a reactor for carbonylating methanol or its reactive derivatives in the presence of water, a catalyst selected from rhodium catalysts, iridium catalysts and mixtures thereof, and a methyl iodide promoter to form an acetic acid reaction mixture in a reactor

Disclosed is a carbonylation process for producing acetic acid comprising: (a) carbonylating methanol or its reactive derivatives in the presence of water, a catalyst selected from rhodium catalysts, iridium catalysts and mixtures thereof, and a methyl iodide promoter to form an acetic acid reaction mixture in a reactor

Recovery of an ethyl acetate solvent, optionally with the recovery of ethanol, from a crude product obtained from the hydrogenation of acetic acid. Separation and purification processes of the crude product are employed to allow recovery of the ethyl acetate solvent.

A catalyst comprising a first metal, a silicaceous support, and at least one metasilicate support modifier, wherein at least 1 wt.% of the at least one metasilicate support modifier is crystalline in phase, as determined by x-ray diffraction. The invention also relates to processes for forming such catalysts, to supports used therein, and to processes for hydrogenating acetic acid in the presence of such catalysts.

Recovery of an ester feed stream, optionally with the recovery of ethanol, from a crude ethanol product obtained from the hydrogenation of acetic acid. Separation and purification processes of the crude ethanol products are employed to allow recovery of the ester feed stream and for integration of the ester feed stream with an esters production process. The composition of the ester feed stream may vary, but at least comprises ethyl acetate and ethanol. The ester feed stream may be fed to one or ...