Catalytic conversion of alcohols--11. Influence of preparation and pretreatment on the selectivity of zirconia
- Potomac State Coll. W. Va. Univ.
Conversion of 2-butanol, 2- and 3-pentanol, 2-hexanol, 2- and 4-octanol, and 4-methyl- and 4,4-dimethyl-2-pentanol at 235/sup 0/-290/sup 0/C and 1 atm alcohol for 4-6 hr over zirconia catalysts prepared from various zirconium salts by precipitation and thermally pretreated in hydrogen or air gave mixtures of the corresponding ketones and alkenes. Many samples pretreated in hydrogen were very selective for dehydration of secondary (but not tertiary) 2-alkanols to alkenes, and two of them showed over 95Vertical Bar3< selectivity for 1-alkenes; the oxygen-treated catalysts were nonselective in most cases. Some of the catalysts showed high dehydrogenation selectivities for the 3- and 4-alkanols. The same nonequilibrium mixture of 3- and 1-methylcyclohexene was obtained from the conversion of pure cis- or trans-2-methylcyclohexanol over this catalyst, suggesting a common intermediate for dehydration, dehydrogenation, and cis-trans isomerization of the alcohol. Over-all, zirconia catalysts resembled thoria, but were quite different from titania and hafnia.
- OSTI ID:
- 6902958
- Journal Information:
- Ind. Eng. Chem., Prod. Res. Dev.; (United States), Vol. 18:3
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ALCOHOLS
CONVERSION
CATALYSTS
CHEMICAL COMPOSITION
CHEMICAL PREPARATION
COMPARATIVE EVALUATIONS
ZIRCONIUM COMPOUNDS
CATALYTIC EFFECTS
CHEMICAL REACTION KINETICS
EXPERIMENTAL DATA
DATA
HYDROXY COMPOUNDS
INFORMATION
KINETICS
NUMERICAL DATA
ORGANIC COMPOUNDS
REACTION KINETICS
SYNTHESIS
TRANSITION ELEMENT COMPOUNDS
400201* - Chemical & Physicochemical Properties
400301 - Organic Chemistry- Chemical & Physicochemical Properties- (-1987)