# US 8,569,200 B2 · Catalyst for hydrocarbon steam cracking, method of preparing the same and method of preparing olefin by using the same

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- Number: US 8,569,200 B2
- Document ID: US8569200B2
- Status: Granted
- Kind: B2
- Application number: 13/309,241
- Filed: 2011-12-01
- Published: 2012-05-03
- Granted: 2013-10-29
- Earliest claimed: 2007-05-25
- Assignees: LG Chem, Ltd.
- Applicants: Jun-han Kang; Jong-hun Song; Jun-seon Choi; Byoung-gi Park; Chang-hoon Kang; Si-hyun Noh
- Inventors: Jun-han Kang; Jong-hun Song; Jun-seon Choi; Byoung-gi Park; Chang-hoon Kang; Si-hyun Noh
- Web page: https://patentgrep.com/patent/US8569200B2

## CPC

- B01J 23/26: Chromium
- B01J 23/002: {Mixed oxides other than spinels, e.g. perovskite}
- B01J 35/33: Electric or magnetic properties
- B01J 37/0009: {Use of binding agents; Moulding; Pressing; Powdering; Granulating; Addition of materials ameliorating the mechanical properties of the product catalyst}
- B01J 37/031: {Precipitation}
- C07C 4/06: Catalytic processes {(C07C4/025 takes precedence)}
- C10G 11/02: characterised by the catalyst used
- C10G 11/05: Crystalline alumino-silicates, e.g. molecular sieves
- C10G 11/10: with stationary catalyst bed
- C10G 11/16: according to the "moving bed" method
- C10G 11/18: according to the "fluidised-bed" technique
- C10G 11/20: by direct contact with inert heated gases or vapours
- B01J 21/063: {Titanium; Oxides or hydroxides thereof}
- B01J 21/066: {Zirconium or hafnium; Oxides or hydroxides thereof}
- B01J 2523/00: Constitutive chemical elements of heterogeneous catalysts
- C07C 2521/06: Silicon, titanium, zirconium or hafnium; Oxides or hydroxides thereof
- C07C 2523/26: Chromium
- C10G 2300/4018: Spatial velocity, e.g. LHSV, WHSV
- C10G 2400/20: C2-C4 olefins
- B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- C07C: ACYCLIC OR CARBOCYCLIC COMPOUNDS
- 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

A catalyst for hydrocarbon steam cracking for the production of light olefin, a preparation method of the catalyst and a preparation method of olefin by using the same. More precisely, the present invention relates to a composite catalyst prepared by mixing the oxide catalyst powder represented by CrZrjAkOx (0.5≦j≦120, 0≦k≦50, A is a transition metal, x is the number satisfying the condition according to valences of Cr, Zr and A, and values of j and k) and carrier powder and sintering thereof, a composite catalyst wherein the oxide catalyst is impregnated on a carrier, and a method of preparing light olefin such as ethylene and propylene by hydrocarbon steam cracking in the presence of the composite catalyst. The composite catalyst of the present invention has excellent thermal/mechanical stability in the cracking process, and has less inactivation rate by coke and significantly increases light olefin yield.

## Claims

### Claim 1

A hydrocarbon steam cracking catalyst comprising a composite catalyst including an oxide catalyst represented by CrZrjAkOx, wherein 5≦j≦120, 5≦k≦30, A is one or more transition metal selected from the group consisting of Ti, Mo, V, and Co and x is the number satisfying the condition according to valences of Cr, Zr and A, and values of j and k,
and a carrier, wherein the carrier is selected from the group consisting of magnesium aluminate, calcium aluminate, silicon carbide, aluminum titanate and zeolite, and wherein the content of the oxide catalyst is 0.5-30 weight % by the total weight of the composite catalyst.

### Claim 2 (depends on 1)

The catalyst for hydrocarbon steam cracking according to claim 1, wherein the composite catalyst has the density of 0.5˜3.5 g/cm3, the surface area up to 50 m2/g and the compressive strength of at least 1000 N.

### Claim 3 (depends on 1)

The catalyst for hydrocarbon steam cracking according to claim 1, wherein the A of the oxide is Ti.

### Claim 4 (depends on 1)

The catalyst for hydrocarbon steam cracking according to claim 1, wherein the carrier is silicon carbide.

### Claim 5 (depends on 1)

The catalyst according to claim 1, wherein steam cracking is performed in the presence of the catalyst for hydrocarbon steam cracking at 800° C. and the weight ratio of products ethylene/propylene is 1.5-1.7.

### Claim 6 (depends on 1)

The hydrocarbon steam cracking catalyst of claim 1, wherein the composite catalyst is prepared by impregnating the oxide catalyst on a carrier.

### Claim 7 (depends on 6)

The catalyst according to claim 6, wherein the oxide catalyst is prepared using a mixture of a Cr containing compound selected from the group containing sulfate, nitrate, oxalate, halide and chloride of chromium, a Zr containing selected from the group containing sulfate, nitrate, oxalate, halide and chloride of Zr, and an alkoxide of A.

### Claim 8 (depends on 1)

The hydrocarbon steam cracking catalyst of claim 1, wherein the composite catalyst is prepared by sintering the oxide catalyst and the carrier.

### Claim 9 (depends on 8)

The catalyst according to claim 8, wherein the oxide catalyst is prepared using a mixture of a Cr containing compound selected from the group containing sulfate, nitrate, oxalate, halide and chloride of chromium, a Zr containing selected from the group containing sulfate, nitrate, oxalate, halide and chloride of Zr, and an alkoxide of A.

### Claim 10

A hydrocarbon steam cracking catalyst comprising a composite catalyst prepared by mixing an oxide catalyst powder represented by CrZrjAkOx, wherein 5≦j≦120, 5≦k≦30, A is one or more transition metal selected from the group consisting of Mo, V, and Co and x is the number satisfying the condition according to valences of Cr, Zr and A, and values of j and k, and a carrier powder and sintering the same,
wherein the content of the oxide catalyst powder is 0.5-30 weight % by the total weight of the composite catalyst.

### Claim 11

A hydrocarbon steam cracking catalyst comprising a composite catalyst prepared by impregnating an oxide catalyst represented by CrZrjAkOx, wherein 5≦j≦120, 5≦k≦30, A is one or more transition metal selected from the group consisting of Mo, V, and Co and x is the number satisfying the condition according to valences of Cr, Zr and A, and values of j and k, on a carrier,
wherein the content of the oxide catalyst is 0.5-30 weight % by the total weight of the composite catalyst.