Modern Methods for Producing Acetic Acid from Methane: New Trends (A Review)

Recent achievements in the development of new methods for producing acetic acid (AA) from methane using heterogeneous catalysts are summarized and systematized. Modern heterogeneous-catalytic processes of methane conversion to AA via syngas and alternative one- and two-step AA production procedures via "low-temperature" oxidative methane conversion (via oxidative coupling, oxyhalogenation, oxidation into methanol, or oxidative transformations of СН4 in the presence of carbon oxides) are considered. The major attention is paid to the one-step AA synthesis by methane oxydation with carbon dioxide (by carboxylation reaction). Specific features of heterogeneous catalysts recently developed for this reaction are discussed.