Abstract: A process for producing and recovering acetic acid in an acetic acid production system is disclosed, the process comprising contacting methanol, methyl acetate, or a mixture of the two, and carbon monoxide in the presence of a reaction mixture comprising iodide under carbonylation conditions sufficient to form acetic acid. The reaction mixture comprises a carbonylation catalyst, water, and one or more promoters selected from the group consisting of Group I and Group II aminopolycarboxylate salts and mixtures thereof. An aspect of the process includes a method for reducing water in the acetic acid production process.

Abstract: A process for producing and recovering acetic acid in an acetic acid production system is disclosed, the process comprising contacting methanol, methyl acetate, or a mixture of the two, and carbon monoxide in the presence of a reaction mixture comprising iodide under carbonylation conditions sufficient to form acetic acid. The reaction mixture comprises a carbonylation catalyst, water, and one or more promoters selected from the group consisting of Group I and Group II polyphosphate and polyphosphonate salts and mixtures thereof. An aspect of the process includes a method for reducing water in the acetic acid production process.

Abstract: A system and method for removing acetaldehyde from an acetic acid system are disclosed. The method includes, providing a light-ends stream, comprising carbon monoxide, carbon dioxide, acetaldehyde, methyl iodide, methyl acetate, water, acetic acid, or mixtures thereof; condensing the light-ends stream to form one or more liquid phase compositions and a vapor phase composition, comprising a majority of the carbon monoxide and carbon dioxide and a minor portion of the acetaldehyde, methyl iodide, water, and acetic acid; contacting the vapor phase composition with a solvent to produce a liquid stream, comprising methyl iodide, acetaldehyde, and a portion of the solvent; and contacting the liquid stream, and optionally a polyol compound, with an acid catalyst to convert a portion of the acetaldehyde to an aldehyde derivative having a higher boiling point than acetaldehyde.

Abstract: A system and method for removing acetaldehyde from an acetic acid system, including providing a solution from the acetic acid system, the stream having methyl iodide and acetaldehyde, distilling the solution to produce an overhead stream having a higher concentration of acetaldehyde, contacting the overhead stream, and optionally a hydroxyl compound, with an acid catalyst to convert the acetaldehyde to an aldehyde derivative having a higher boiling point than acetaldehyde.

Abstract: The present disclosure provides for a method for measuring the concentration of one or more components in a feed stream or reactor mixture of a process for producing acetic acid by both infrared and Raman spectroscopic analyses. In some embodiments, at least one feed stream comprising water is adjusted in response to the measured concentration of one or more components.

Abstract: The present disclosure provides for a method for measuring the concentration of one or more components in a feed stream or reactor mixture of a process for producing acetic acid by both infrared and Raman spectroscopic analyses. In some embodiments, at least one feed stream comprising water is adjusted in response to the measured concentration of one or more components.