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Influence of Cr addition to Raney Ni catalyst on hydrogenation of isophorone

Paper ID Volume ID Publish Year Pages File Format Full-Text
51622 46848 2008 4 PDF Available
Title
Influence of Cr addition to Raney Ni catalyst on hydrogenation of isophorone
Abstract

The influence of Cr (1–6 at.%) on the catalytic activity and selectivity of Ni–Al alloy in isophorone (3,5,5-trimethyl-2-cyclohexen-1-one) hydrogenation was studied. The catalysts were obtained from the rapidly quenched precursors by leaching in NaOH aqueous solution. The catalytic tests were performed at various temperatures (20–80 °C) under the atmospheric or elevated pressure using gaseous hydrogen and 2-propanol as a solvent. Ni–Al–Cr alloy with 1 at.% Cr appeared to be the most active and selective catalyst, with the conversion level and selectivity to dihydroisophorone (3,3,5-trimethylcyclohexanone) exceeding 99%. On the other hand, further hydrogenation of dihydroisophorone to homomenthol (3,3,5-trimethylcyclohexanol) was strongly restrained by the Cr-containing catalysts.Scanning electron microscopy, Auger electron spectroscopy, energy dispersive X-ray spectroscopy and X-ray diffraction allowed changes occurring during the catalyst preparation to be identified and their implications for catalytic function to be considered.

Keywords
Isophorone hydrogenation; Ni–Al–Cr catalysts; Auger electron spectroscopy (AES); Scanning electron microscopy (SEM); Energy dispersive X-ray spectroscopy (EDS)
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Influence of Cr addition to Raney Ni catalyst on hydrogenation of isophorone
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 10, Issue 2, 15 November 2008, Pages 213–216
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
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Price was $35.95
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