Catalytic conversion of alcohols: the impact of inductive effect for secondary alcohol dehydration

Journal Article · Fri Apr 01 00:00:00 EST 1988 · J. Catal.; (United States)

DOI:https://doi.org/10.1016/0021-9517(88)90334-X· OSTI ID:5218071

Dabbagh, H A; Davis, B H

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), Vol. 110:2
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
10 SYNTHETIC FUELS
ALUMINIUM OXIDES
CATALYTIC EFFECTS
BUTANOLS
CATALYTIC REFORMING
GALLIUM OXIDES
INDIUM OXIDES
PENTANOLS
THORIUM OXIDES
TITANIUM OXIDES
TUNGSTEN OXIDES
BUTENES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
DEHYDRATION
OCTANOLS
PENTENES
REACTION INTERMEDIATES
ACTINIDE COMPOUNDS
ALCOHOLS
ALKENES
ALUMINIUM COMPOUNDS
CHALCOGENIDES
GALLIUM COMPOUNDS
HYDROCARBONS
HYDROXY COMPOUNDS
INDIUM COMPOUNDS
KINETICS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
REACTION KINETICS
REFORMER PROCESSES
REFRACTORY METAL COMPOUNDS
THORIUM COMPOUNDS
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
TUNGSTEN COMPOUNDS
400201* - Chemical & Physicochemical Properties
090221 - Alcohol Fuels- Chemical Synthesis- (1976-1989)