Isomerization and disproportionation of olefins over tungsten oxides supported on various oxides

Journal Article · Wed Oct 01 00:00:00 EDT 1980 · J. Catal.; (United States)

DOI:https://doi.org/10.1016/0021-9517(80)90321-8· OSTI ID:6223144

Yamaguchi, T; Tanaka, Y; Tanabe, K

The acid amount at different acid strengths increased with increasing amount of tungsten trioxide (0-20% WO/sub 3/) supported on titanium dioxide. The catalytic activity of 5% WO/sub 3/ on various supports for the Broenstedt acid-catalyzed ring opening isomerization of cyclopropane decreased in the order alumina > zirconium dioxide > titanium dioxide > silica, magnesium oxide; the addition of WO/sub 3/ to the support increased the activity of the first three oxides and suppressed the activity of silica and magnesium oxide. The activity of 0-20% WO/sub 3/ on titanium dioxide for 1-butene isomerization corresponded to the measured acid amounts of the catalysts; the cis/trans ratio of the 2-butene products decreased from 9:1 to 1.5:1 as the WO/sub 3/ content in the catalyst increased from 0 to 1, and remained constant with further addition of WO/sub 3/ to the catalyst. The activity of 5% WO/sub 3/ supported on various oxides for propylene disproportionation decreased in the order: titanium dioxide > zirconium dioxide > alumina > silica > magnesium oxide. Hydrogen-reduction of the catalysts enhanced their activity. The disproportionation reaction over titanium dioxide supported 0-20% WO/sub 3/ went through a maximum at 5% WO/sub 3/, and this 5% WO/sub 3//titanium dioxide catalyst was much more active than the conventional alumina/WO/sub 3/ catalysts.

• Research Organization: Hokkaido Univ.
• OSTI ID: 6223144
• Journal Information: J. Catal.; (United States), Vol. 65:2
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
BUTENES
ISOMERIZATION
OXIDATION
REDUCTION
CATALYST SUPPORTS
COMPARATIVE EVALUATIONS
CATALYSTS
CHEMICAL COMPOSITION
CHEMICAL PROPERTIES
PROPYLENE
TUNGSTEN OXIDES
CATALYTIC EFFECTS
ALUMINIUM OXIDES
BROENSTED ACIDS
CHEMICAL PREPARATION
CHEMICAL REACTION YIELD
EXPERIMENTAL DATA
MAGNESIUM OXIDES
SILICA
TITANIUM OXIDES
ZIRCONIUM OXIDES
ALKALINE EARTH METAL COMPOUNDS
ALKENES
ALUMINIUM COMPOUNDS
CHALCOGENIDES
CHEMICAL REACTIONS
DATA
HYDROCARBONS
HYDROGEN COMPOUNDS
INFORMATION
INORGANIC ACIDS
MAGNESIUM COMPOUNDS
MINERALS
NUMERICAL DATA
ORGANIC COMPOUNDS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
REFRACTORY METAL COMPOUNDS
SILICON COMPOUNDS
SILICON OXIDES
SYNTHESIS
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
TUNGSTEN COMPOUNDS
YIELDS
ZIRCONIUM COMPOUNDS
400301* - Organic Chemistry- Chemical & Physicochemical Properties- (-1987)
400201 - Chemical & Physicochemical Properties