Hydrogenation reaction conditions for producing ethanol
AssigneeCelanese International Corporation
InventorsRadmila Wollrab, Victor J. Johnston, Heiko Weiner
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Abstract
The present invention relates to processes for producing ethanol from a feed stream comprising hydrogen and acetic acid and/or ethyl acetate. The reaction occurs at a temperature greater than 225° C. and the feed stream has a liquid hourly space velocity of at least 0.2 hr−1. The reaction occurs in the presence of a catalyst comprising a precious metal and one or more active metals on a modified support.
Claims20
A process for producing ethanol, comprising contacting hydrogen with a feed stream comprising acetic acid and/or ethyl acetate in a reactor at a temperature greater than 225° C. in the presence of a catalyst, under conditions effective to form ethanol, provided that the liquid hourly space velocity of the feed stream to the reactor is from 0.2 hr−1 to 1 hr−1, wherein the catalyst comprises a precious metal and one or more active metals on a modified support, wherein the modified support comprises (i) support material, and (ii) a support modifier comprising a metal selected from the group consisting of tungsten, molybdenum, vanadium, niobium and tantalum, and further wherein the one or more active metals are selected from the group consisting of copper, iron, cobalt, vanadium, nickel, titanium, zinc, chromium, molybdenum, tungsten, tin, lanthanum, cerium, manganese and mixtures thereof.
A process for producing ethanol, comprising contacting hydrogen with a mixed feed stream comprising acetic acid and ethyl acetate in a reactor at a temperature from greater than 225° C. to 300° C. in the presence of a catalyst, wherein the liquid hourly space velocity of the feed stream to the reactor is from 0.2 hr−1 to 1 hr−1, to form ethanol and achieve steady state ethyl acetate concentration, wherein the catalyst comprises a precious metal and one or more active metals on a modified support, wherein the modified support comprises (i) support material, and (ii) a support modifier comprising a metal selected from the group consisting of tungsten, molybdenum, vanadium, niobium and tantalum, and further wherein the one or more active metals are selected from the group consisting of copper, iron, cobalt, vanadium, nickel, titanium, zinc, chromium, molybdenum, tungsten, tin, lanthanum, cerium, manganese and mixtures thereof.
Dependencies are inferred from the claim text.