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US 4,046,832 AGranted
Catalytic process for the preparation of butenes from propylene
AssigneeThe Goodyear Tire & Rubber Company
InventorsEdward N. Nowak, Kenneth J. Frech
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AssigneeThe Goodyear Tire & Rubber Company
InventorsEdward N. Nowak, Kenneth J. Frech
Estimating the term…
There is disclosed a process for the preparation of butenes from propylene using a catalyst comprising from 1 to 15 percent by weight of vanadium oxide -- V.sub.2 O.sub.5 and from 0.1 to 5 percent by weight of tungsten oxide -- WO.sub.3 impregnated on a support which has a surface area of 10 to 400 square meters per gram which catalyst has been activated by contact with from 0.1 to 10 moles of a trialkylaluminum compound per mole of V.sub.2 O.sub.5.
A method of preparing butenes from propylene which comprises contacting propylene with a catalyst comprising from 3 to 10 percent by weight of V.sub.2 O.sub.5 and from 0.1 to 3.0 percent by weight of WO.sub.3 impregnated on a support which has a surface area of 10 to 400 square meters per gram and which is selected from the group consisting of alumina, silica, thoria, zirconia, oxides of titanium, oxides of magnesium and mixtures thereof, which catalyst has been activated by contact with from 0.1 to 10 moles of a trialkylaluminum selected from the the group consisting of aluminum trimethyl, aluminum triethyl, aluminum tripropyl and aluminum triisobutyl per mole of V.sub.2 O.sub.5, in which the temperature ranges from about 20 to about 450.degree. C. and the propylene is fed at a GHSV of from about 10 to about 1000.
Dependencies are inferred from the claim text.
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Chromium, molybdenum or tungsten: tungsten
Metathesis reactions at an unsaturated carbon-to-carbon bond: at a carbon-to-carbon double bond
Catalyst and recycle considerations: catalyst preservation or manufacture, e.g. activation before use
Chemical or physical processes
Term ended 6 Sep 1994 (estimated)
USPTO file history isn’t available for this patent, so only indexed dates are shown.
This application is directed to a process whereby butenes are prepared from propylene. The process utilizes as a catalyst a mixture of vanadium oxide and tungsten oxide on a suitable support, said catalyst being activated by a trialkylaluminum prior to use.
The catalysts useful in this invention have been found to promote the olefin metathesis process. Olefin metathesis or olefin disproportionation is a reaction in which a unique bond reorganization takes place whereby material possessing carbon to carbon double bonds undergo a redistribution of constituents as depicted in the following equation:
2CH.sub.3 CH=CH.sub.2 .revreaction.CH.sub.3 CH=CH CH.sub.3 or CH.sub.2 =CH CH.sub.2 CH.sub.3 + CH.sub.2 =CH.sub.2