Syngas reactions: IX. Acetic acid from synthesis gas
作者： J KNIFTON
DOI: 10.1016/0021-9517(85)90313-6
关键词: Nuclear chemistry 、 Methyl iodide 、 Syngas 、 Chemistry 、 Catalysis 、 Cobalt 、 Ruthenium 、 Carbonylation 、 Iodide 、 Inorganic chemistry 、 Acetic acid
摘要: Abstract Acetic acid has been generated directly from synthesis gas ( CO H 2 ) in up to 95 wt% selectivity and 97% carbon efficiency using a RuCoI Bu 4 PBr “melt” catalyst combination. The critical roles of each the ruthenium, cobalt iodide components achieving maximum HOAc have identified. C1-oxygenate formation is only observed presence ruthenium carbonyls; [Ru(CO)3I3]− here dominant species. Controlled quantities ensure that initially formed MeOH rapidly converted more reactive methyl iodide. Subsequent cobalt-catalyzed carbonylation acetic may be preparatively attractive (>80% selectivity) relative competing syntheses where [Co(CO)4]− concentration maximized; is, Co/Ru ratio > 1, syngas feedstock rich initial iodide/cobalt ratios are close unity. Formation cobalt-iodide species significant concentrations appears an inhibiting step this synthesis.
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