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Chemistry of the oxidation of acetic acid during the homogeneous metal-catalyzed aerobic oxidation of alkylaromatic compounds

Paper ID Volume ID Publish Year Pages File Format Full-Text
41056 45876 2011 7 PDF Available
Title
Chemistry of the oxidation of acetic acid during the homogeneous metal-catalyzed aerobic oxidation of alkylaromatic compounds
Abstract

Acetic acid is the solvent used for the commercial production of five aromatic acids from polyalkylbenzenes using homogeneous aerobic oxidation. The most important catalysts are mixtures of cobalt(II) and manganese(II) acetates. The co-oxidation of the acetic acid to carbon dioxide and carbon monoxide, denoted COx, is one of the economic disadvantages of the processes. Understanding the chemistry of the oxidation of acetic acid can led to reduction in these greenhouse gases. This paper assembles and summarizes the organic, free-radical and coordination chemistry detailing how the various products from the oxidation of acetic acid form. It is suggested that the initiation of the acetic acid occurs primarily through the thermal decomposition of cobalt(III) acetate. This leads to three families of by-products starting from the oxidation of methanol, succinic acid and glycolic acid. Carbon monoxide forms by decarbonylation of many of these intermediates. Concerted reactions via polynuclear cobalt and manganese complexes provides efficient mechanistic pathways to these intermediates and by-products. The chemistry presented for the oxidation of the acetic acid is consistent with known optimization methods which are used to reduce acetic acid loss.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (124 K)Download as PowerPoint slideHighlights► Chemistry of the aerobic oxidation of acetic acid is described. ► Roles of Co, Mn, Br catalysts are given. ► Methods of reduction of acetic acid oxidation are given. ► Multinuclear complexes provide efficient pathways.

Keywords
Autoxidation; Dioxygen; Cobalt; Manganese; Terephthalic acid; Acetic acid
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Chemistry of the oxidation of acetic acid during the homogeneous metal-catalyzed aerobic oxidation of alkylaromatic compounds
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volumes 409–410, 15 December 2011, Pages 48–54
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us