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US 9,000,234 B2Granted
Calcination of modified support to prepare hydrogenation catalysts
AssigneeCelanese International Corporation
InventorsHeiko Weiner, Zhenhua Zhou, Victor J. Johnston
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Abstract
The present invention relates to a catalyst having an amorphous support and one or more active metals. The amorphous support may comprise a support material and an amorphous support modifier, which adjusts the acidity of the support material. In preparing the amorphous catalyst, post-synthesis treatment, i.e. calcination, may be used to adjust the catalyst performance while converting acetic acid to ethanol.
Claims18
A process for producing ethanol comprising:
- contacting a feed stream comprising acetic acid and hydrogen in a reactor at an elevated temperature with a hydrogenation catalyst comprising an amorphous support and one or more active metals, wherein the hydrogenation catalyst is prepared by:
- contacting a precursor to an amorphous support modifier with a support material to form a catalyst solution, wherein the support modifier is selected from the group consisting of (i) alkaline earth metal oxides, (ii) alkali metal oxides, (iii) alkaline earth metal silicates, (iv) alkali metal silicates, (v) Group IIB metal oxides, (vi) Group IIB metal silicates, (vii) Group IIIB metal oxides, (viii) Group IIIB metal silicates, and mixtures thereof;
- calcining the catalyst solution at a temperature from 400° C. to 750° C. to decompose the precursor to form the amorphous support;
- and
- adding the one or more active metals to the amorphous support.
2 more elements
A process for producing ethanol comprising:
- contacting a feed stream comprising acetic acid and hydrogen in a reactor at an elevated temperature with a hydrogenation catalyst comprising an amorphous support and one or more active metals, wherein the hydrogenation catalyst is prepared by:
- contacting a precursor to an amorphous support modifier with a support material to form a catalyst solution, wherein the amorphous support modifier is selected from the group consisting of (i) alkaline earth metal oxides, (ii) alkali metal oxides, (iii) alkaline earth metal silicates, (iv) alkali metal silicates, (v) Group IIB metal oxides, (vi) Group IIB metal silicates, (vii) Group IIIB metal oxides, (viii) Group IIIB metal silicates, and mixtures thereof;
- calcining the catalyst solution at a temperature greater than 750° C. to decompose the precursor to form the amorphous support;
- and
- adding the one or more active metals to the amorphous support, wherein the catalyst has a packing density that is greater than 0.3 g/mL.
2 more elements
Dependencies are inferred from the claim text.