Fatty methyl ester hydrogenation to fatty alcohol part I: Correlation between catalyst properties and activity/selectivity |
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Authors: | Ross D. Rieke Deepak S. Thakur Brian D. Roberts Geoffrey T. White |
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Affiliation: | (1) Research and Development, Engelhard Corporation, 44122 Beachwood, Ohio;(2) Sharon Woods Technical Center, Procter & Gamble Company, 11530 Reed Hartman Highway, 45241 Cincinnati, OH |
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Abstract: | Fatty alcohols, derived from natural sources, are commercially produced by hydrogenation of fatty acids or methyl esters in slurry-phase or fixed-bed reactors. One slurry-phase hydrogenation of methyl ester process flows methyl esters and powdered copper chromite catalyst into tubular reactors under high hydrogen pressure and elevated temperature. In the present investigation, slurry-phase hydrogenations of C12 methyl ester were carried out in semi-batch reactions at nonoptimal conditions (i.e., low hydrogen pressure and elevated temperature). These conditions were used to accentuate the host of side reactions that occur during the hydrogenation. Some 14 side reaction routes are outlined. As an extension of this study, copper chromite catalyst was produced under a number of varying calcination temperatures. Differences in catalytic activity and selectivity were determined by closely following side reaction products. Both activity and selectivity correlate well with the crystallinity of the copper chromite surface; they increase with decreasing crystallinity. The ability to follow the wide variety of side reactions may well provide an additional tool for the optimized design of hydrogenation catalysts. |
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Keywords: | Copper chromite fatty alcohol fatty-fatty ester hydrogenation methyl ester slurry hydrogenation wax ester |
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