Catalyst and Process for the Synthesis of C2-Oxygenates by the Hydrogenation of Carbon Monoxide
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United States of America Patent
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Issued Date -
Nov 15, 2007
app pub date -
Jun 23, 2004
filing date -
Jun 23, 2004
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Abstract
A catalyst is invented for the synthesis of C.sub.2-oxygenates by the hydrogenation of CO. The catalyst is composed of Rh--Mn--Fe-M.sub.1-M.sub.2/Si0.sub.2, among them Mn, Fe, M.sub.1 and M.sub.2 and additives. M.sub.1 can be Li or Na while M.sub.2 can be Ru or Ir. The content of Rh is 0.1-3% by weight; the weight ratio of Mn/Rh is 0.5-12, the weight ratio of Fe/Rh is 0.01-0.5, the weight ratio of M.sub.1/Rh is 0.01-1 and the weight ratio of M.sub.2/Rh is 0.1-1.0. The catalyst is prepared by impregnation of the solution of corresponding compounds of each component in desired amount onto the carrier of Si0.sub.2, which is followed by drying at 283-473 K. Before using, the catalyst is reduced by hydrogen or hydrogen-containing gas at 573-673 K for at least one hour after drying or after calcinations at 473-673 K for 2-20 h. These catalysts can convert CO and H.sub.2 into ethanol, acetaldehyde, acetic acid and other C.sub.2-oxygenates at a high conversion and a high selectivity under mild conditions.
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