Catalyst and process for double-bond isomerization

Claim 2

A PROCESS FOR THE DOUBLE BOND ISOMERIZATION OF DOUBLE BOND ISOMERIZABLE OLEFINIC HYDROCARBONS WHICH COMPRISES CONTACTING SAID OLEFINIC HYDROCARBON UNDER DOUBLE BOND ISOMERIZATION CONDITIONS IN ADMIXTURE WITH MOLECULAR HYDROGEN WITH A CATALYST COMPOSITION CONSISTING ESSENTIALLY OF URANIUM, A GROUP VA ELEMENT SELECTED FROM THE GROUP CONSISTING OF PHOSPHORUS, ARSENIC, ANTIMONY, AND BISMUTH, OXYGEN IN COMBINED FROM WITH SAID URANIUM OR GROUP VA ELEMENT, AND A SOLID HIGH SURFACE AREA CATALYST SUPPORT, WHEREIN THE RATIOS OF URANIUM: GROUP VA ELEMENT ARE EFFECTIVE FOR SAID DOUBLE BOND ISOMERIZATION, AND SAID CATALYST COMPOSITION IS PRETREATED AT ELEVATED TEMPERATURES WITH MOLECULAR HYDROGEN PRIOR TO SAID CONTACTING.

Claim 3

The process according to claim 1 wherein said olefinic hydrocarbon is a terminal monoolefin, non-conjugated polyene, or diolefin having conjugated double bonds other than centrally located in the molecule.

Claim 4

The procesS according to claim 1 wherein said olefinic hydrocarbon is a cyclic polyene or an alkenyl-substituted cycloolefin.

Claim 5

The process according to claim 3 wherein said double bond isomerization conditions include a contacting temperature of about 250* to 600* F., a pressure of about 0 to 2,000 psig, and a feed rate of about 0.1 to 10 LHSV.

Claim 6

The process according to claim 4 wherein in said double bond isomerization process said molecular hydrogen in said process admixture is employed in the range of about 0.5:1 to 3:1 molar ratio of hydrogen:olefinic hydrocarbon.

Claim 7

The process according to claim 5 wherein said double bond isomerization conditions further include admixture with carbon monoxide in a range of about 0.5 to 5 volume per cent relative to said hydrogen.

Claim 8

The process according to claim 4 wherein said olefinic hydrocarbon feed is a cyclic polyene.

Claim 9

The process according to claim 8 wherein said cyclic polyene is 1,5-cyclooctadiene and said catalyst is uranium-arsenic-on-alumina.

Claim 10

The process according to claim 4 wherein said olefinic hydrocarbon feed is an alkenyl-substituted cyclomonoolefin.

Claim 11

The process according to claim 9 wherein said alkenyl-substituted cycloolefin is 4-vinylcyclohexene and said catalyst is uranium-arsenic-on-alumina.

Claim 12

A process for the double bond isomerization of double bond isomerizable olefinic hydrocarbons according to the process of claim 1 wherein said olefinic hydrocarbon feed contains 4 to 30 carbon atoms per molecule and 1 to 4 double bonds per molecule, said catalyst composition consists essentially of uranium oxide and an oxide of a Group VA element on a support, containing about 1 to 30 weight per cent uranium based on the total weight of said catalyst composition, and an atomic ratio of about 3:1 to 1:3 uranium: Group VA element.

Claim 13

The process according to claim 11 wherein said Group VA element is phosphorus.

Claim 14

The process according to claim 11 wherein said Group VA element is arsenic.

Claim 15

The process according to claim 11 wherein said Group VA element is antimony.

Claim 16

The process according to claim 11 wherein said Group VA element is bismuth.

Claim 17

The process according to claim 11 wherein said support is alumina, silica, silica-alumina, zirconia, titania, thoria, magnesium silicate, zinc aluminate, charcoal, kieselguhr, or mixture thereof, and said support is a solid high surface area support having a surface area of at least one square meter per gram of said support.

Claim 18

The process according to claim 11 wherein said elevated temperature molecular hydrogen pretreatment of said catalyst composition is at calcination temperatures of about 500* to 1000* F.

Claim 19

The process according to claim 11 wherein said olefinic hydrocarbon feed is selected from the group consisting of butene-1, butene-2, pentene-1, 3-octene, 6-p-tolylhexene-1, 2-methylheptene-3, 4-vinylcyclohexene, 1,5-cyclooctadiene, 1,5,9-cyclododecatriene, 1,3,7-octatriene, 1,3,5,9-decatetraene, eicosene-1, 1-cyclohexylbutene-2, 4-phenylbutene-1, 1-methylcyclohexene, 5-cyclohexylpentene-1, 3-ethylcyclopentene, and triacontene-1.

Claim 20

A process according to claim 1 wherein said catalyst composition contains 1 to 30 weight per cent uranium and an atomic ratio of 3:1 to 1:3 uranium: Group VA element.

Claim 21

A process according to claim 19 wherein said catalyst composition contains 2 to 20 weight per cent uranium.

Claim 22

A process according to claim 17 wherein said calcination temperature is in the range of about 700* to 1,200* F.

Claim 23

A process according to claim 1 wherein said olefinic hydrocarbon contains 4 to 30 carbon atoms per molecule and 1 to 4 double bonds per molecule.

Claim 24

A process according to claim 1 wherein said olefinic hydrocarbon is 1,5-cyclooctadiene, alkyl derivative thereof, 4-vinylcyclohexene, or alkyl derivative thereof.

Claim 25

A process according to claim 1 wherein said olefinic hydrocarbon is in a feed stream diluted with an inert diluent comprising saturated aliphatic hydrocarbons.

Claim 26

A process for the double-bond isomerization of double-bond isomerizable olefinic hydrocarbons under double-bond isomerization conditions, which comprises contacting in admixture with molecular hydrogen and olefinic hydrocarbon feed wherein said olefinic hydrocarbon comprises a cyclic polyene or an alkenyl-substituted cycloolefin, containing 1 to 4 double bonds per molecule and 4 to 30 carbon atoms per molecule, with a catalyst composition consisting essentially of uranium, a Group VA element, oxygen in combined form with said uranium or Group VA element, and a solid high surface area catalyst support, wherein said Group VA element is arsenic, antimony, bismuth, or phosphorus, wherein said catalyst composition contains 1 to 30 weight per cent uranium, sufficient said Group VA element to provide an atomic ratio of 3:1 to 1:3 of uranium: Group VA element, and wherein said catalyst composition is prepared by a process including calcination and treatment with a molecular hydrogen containing gas at about 500* to 1000* F. prior to said contacting with said olefinic hydrocarbon feed.

Claim 27

A process for the double-bond isomerization of double-bond isomerizable olefinic hydrocarbons under double-bond isomerization conditions, which comprises contacting in admixture with molecular hydrogen and olefinic hydrocarbon feed wherein said olefinic hydrocarbon comprises a cyclic polyene or an alkenyl-substituted cycloolefin, containing 1 to 4 double bonds per molecule and 4 to 30 carbon atoms per molecule, with a catalyst composition consisting essentially of uranium, a Group VA element, oxygen in combined form with said uranium or Group VA element, and a solid high surface area catalyst support, wherein said Group VA element is arsenic, antimony, bismuth, or phosphorus, wherein said catalyst composition contains 1 to 30 weight per cent uranium, sufficient said Group VA element to provide an atomic ratio of 3:1 to 1:3 of uranium: Group VA element, and wherein said catalyst composition is prepared by a process including calcination and treatment with a molecular hydrogen containing gas at about 500* to 1000* F. prior to said contacting with said olefinic hydrocarbon feed.