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CAPLUS COPYRIGHT 2013 ACS
||Production of alcohol from carbonaceous feedstock
||Daniel, Berian John; Gracey, Benjamin Patrick
||BP P.L.C., UK
||PCT Int. Appl., 35pp. CODEN: PIXXD2
The invention relates to the process for conversion of ethanoic acid into ethanol characterized by the following steps, (a) introducing ethanoic acid and H2 into a primary hydrogenation unit in the presence of a precious metal-based catalyst to produce ethanol and Et ethanoate, (b) introducing Et ethanoate, from step (a), together with H2, into a secondary hydrogenation unit in the presence of a copper-based catalyst to produce ethanol, and (c) recovering ethanol from step (b). Thus, in the primary reactor H2 and ethanoic acid with a molar ratio of 10/1 was passed over the palladium-silver-rhenium-iron catalyst at 230° and 2.0 MPa with a GHSV of 4343 h-1 to give a product showing conversion of ethanoic acid to Et groups recoverable as ethanol was 41.9 %, of which 19.7 % was as Et ethanoate, 21.6 % ethanol, 0.4 % ethanal and 0.2 % di-Et ether and the total conversion of ethanoic acid to products was 44.7 %, the selectivity of ethanoic acid to Et groups recoverable as ethanol was 93.8 %; in the secondary reactor H2 and Et ethanoate with a molar ratio of 10/1 was passed over the copper-based catalyst at 200° and 5.0 MPa with a GHSV of 4491 h-1, the conversion of Et ethanoate to Etgroups recoverable as ethanol was 69.5 %, the selectivity of Et ethanoate to Et groups recoverable as ethanol was 99.9%.
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