Catalytic conversion of alcohols: the impact of inductive effect for secondary alcohol dehydration
The use of linear free energy relationships (LFER) has become widespread in chemistry and correlations of product selectivity data for elimination reactions have resulted from application of LFER. A number of these correlations have involved heterogeneous catalysis. Dautzenberg and Knoezinger reported that the 1-alkene selectivity from the dehydration of 2-ols, with the general formula RCH/sub 2/CHOHCH/sub 3/, where R varied from methyl to tert-butyl, fit a LFER when correlated with Taft's inductive constant. Davis found that isomerization of the primary alkene products from 2-butanol and 2-pentanol could make a significant contribution in determining the slope of the LFER plot for an alumina catalyst. Davis contended that the inductive effect had little, if any, impact in determining the selectivity for terminal alkene. In view of the results with the alumina catalysts, it appeared desirable to extend the alcohol dehydration study to include other catalysts. Davis found that 2-octanol, because of its higher boiling point, provided a higher relative pressure and, as a consequence, a higher surface coverage than 2-butanol; thus, at low (less than ca. 20%) conversion 2-octanol effectively retarded secondary reactions of the primary butene and pentene products. Consequently, 2-butanol and 2-pentanol were converted in the presence of 2-octanol in these studies. Data are given for the following catalysts: aluminum oxide, thorium oxide, tungsten oxide, gallium oxide, indium oxide, and titanium oxide. 14 references.
- Research Organization:
- Kentucky Energy Cabinet Lab., Lexington (USA)
- OSTI ID:
- 5218071
- Journal Information:
- J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 110:2; ISSN JCTLA
- Country of Publication:
- United States
- Language:
- English
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10 SYNTHETIC FUELS
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ACTINIDE COMPOUNDS
ALCOHOLS
ALKENES
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
BUTANOLS
BUTENES
CATALYTIC EFFECTS
CATALYTIC REFORMING
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
DEHYDRATION
GALLIUM COMPOUNDS
GALLIUM OXIDES
HYDROCARBONS
HYDROXY COMPOUNDS
INDIUM COMPOUNDS
INDIUM OXIDES
KINETICS
OCTANOLS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PENTANOLS
PENTENES
REACTION INTERMEDIATES
REACTION KINETICS
REFORMER PROCESSES
REFRACTORY METAL COMPOUNDS
THORIUM COMPOUNDS
THORIUM OXIDES
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
TUNGSTEN COMPOUNDS
TUNGSTEN OXIDES