# US 8,785,709 B2 · Catalytic isomerisation of linear olefinic hydrocarbons

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- Number: US 8,785,709 B2
- Document ID: US8785709B2
- Status: Granted
- Kind: B2
- Application number: 13/436,129
- Filed: 2012-03-30
- Published: 2012-10-04
- Granted: 2014-07-22
- Earliest claimed: 2011-03-30
- Assignees: University of Louisville Research Foundation, Inc.
- Applicants: Paul Ratnasamy; Moises Carreon; Chinmay Deshmane
- Inventors: Paul Ratnasamy; Moises Carreon; Chinmay Deshmane
- Web page: https://patentgrep.com/patent/US8785709B2

## CPC

- C07C 5/2772: {with metal oxides}
- B01J 23/20: Vanadium, niobium or tantalum
- B01J 35/51: Spheres
- B01J 35/615: {100-500 m2/g}
- B01J 35/647: {2-50 nm}
- B01J 35/70: characterised by their crystalline properties, e.g. semi-crystalline (catalysts comprising carbon B01J21/18; molecular sieves B01J29/00)
- B01J 35/77: Compounds characterised by their crystallite size
- B01J 37/0018: {Addition of a binding agent or of material, later completely removed among others as result of heat treatment, leaching or washing,(e.g. forming of pores; protective layer, desintegrating by heat)}
- B01J 37/036: {to form a gel or a cogel}
- B01J 37/10: in the presence of water, e.g. steam
- C07C 11/02: Alkenes
- C10G 45/60: characterised by the catalyst used
- B01J 2235/15: X-ray diffraction
- B01J 2235/30: Scanning electron microscopy; Transmission electron microscopy
- C07C 2523/08: of gallium, indium or thallium
- C07C 2523/20: Vanadium, niobium or tantalum
- C10G 2300/1088: Olefins
- C10G 2400/22: Higher olefins
- C07C: ACYCLIC OR CARBOCYCLIC COMPOUNDS
- B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- C10G: CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION (cracking to hydrogen or synthesis gas C01B; cracking or pyrolysis of hydrocarbon gases to individual hydrocarbons or mixtures thereof of definite or specified constitution C07C; cracking to cokes C10B); RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES

## Abstract

Gallium-niobium oxide catalysts are disclosed herein for converting linear olefinic hydrocarbons to branched olefinic hydrocarbons through isomerization, the latter being capable for use fuel for their desirable properties.

## Claims

### Claim 1

A process for catalytic isomerisation of linear, olefinic hydrocarbons, comprising the steps of:
contacting linear olefinic hydrocarbon reactants with a catalyst; and
isolating branched olefinic hydrocarbon products,
wherein the catalyst is a solid gallium-niobium mixed oxide catalyst having a synthesis mole ratio of gallium to niobium between about 0.2:1 and 6.6:1 and a surface area of at least 210 m2/g.

### Claim 2 (depends on 1)

The process of claim 1, wherein the surface area of the catalyst is between about 300 m2/g and 366 m2/g.

### Claim 3 (depends on 1)

The process of claim 1, wherein the ICP-determined mole ratio of gallium to niobium is between about 0.03:1 and 2.8:1.

### Claim 4 (depends on 1)

The process of claim 1, carried out at a temperature between about 150° C. and about 450° C.

### Claim 5 (depends on 4)

The process of claim 4, carried out at a temperature no greater than about 400° C.

### Claim 6 (depends on 1)

The process of claim 1, wherein each linear olefinic hydrocarbon reactant has no more than 35 carbons.

### Claim 7 (depends on 6)

The process of claim 6, wherein each linear hydrocarbon reactant has between 4 and 19 carbons.

### Claim 8 (depends on 1)

The process of claim 1, wherein the catalyst is prepared by adding a solution of at least one structure directing agent in alcohol to a solution of gallium and niobium in alcohol under conditions and for a duration sufficient to react a sufficient amount of the reactants to form a mixed gallium-niobium oxide catalyst having a synthesis mole ratio of gallium to niobium between about 0.2:1 and 6.6:1.