# US 11,306,163 B2 · Chromium oxide catalyst for ethylene polymerization

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- Number: US 11,306,163 B2
- Document ID: US11306163B2
- Status: Granted
- Kind: B2
- Application number: 16/476,896
- Filed: 2018-01-10
- Published: 2021-09-16
- Granted: 2022-04-19
- Earliest claimed: 2017-01-11
- Assignees: Sabic Global Technologies B.V.
- Applicants: SABIC Global Technologies B.V.
- Inventors: Orass M. Hamed; Vugar O. Aliyev; Moosa Husain Al-Harthe
- Web page: https://patentgrep.com/patent/US11306163B2

## CPC

- C07F 11/005: {compounds without a metal-carbon linkage}
- C08F 4/69: Chromium, molybdenum, tungsten or compounds thereof
- B60K 15/03177: {made of non-metallic material, e.g. plastics, or of a combination of non-metallic and metallic material (B60K15/03006 takes precedence)}
- C07F 5/061: {with C-aluminium linkage}
- C07F 5/066: {compounds with Al linked to an element other than Al, C, H or halogen (this includes Al-cyanide linkage)}
- C07F 7/003: {without C-Metal linkages}
- C08F 2/34: Polymerisation in gaseous state
- C08F 10/02: Ethene
- B60K 2015/03493: {made of plastics}
- C08F 2410/04: Dual catalyst, i.e. use of two different catalysts, where none of the catalysts is a metallocene
- C08F 2410/06: Catalyst characterized by its size
- C07F: ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM (metal-containing porphyrins C07D487/22)
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- B60K: ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES

## Abstract

The invention relates to a solid catalyst system comprising a chromium compound, a metal compound, an aluminium compound and a silicon oxide support, wherein the silicon oxide support has an average particle diameter in the range between ≥20 and ≤50 μm, a pore volume in the range between ≥1.7 ml/g and ≤3 ml/g, and a surface area in the range between ≥400 m2/g and ≤800 m2/g, and wherein the aluminium alkoxide compound has the formula R1—Al—OR2 wherein R1 is selected from (C1-C8) alkyl groups and OR2 is selected from (C1-C8) alkoxyl groups.

## Claims

### Claim 1

Solid catalyst system comprising a chromium compound, a metal compound, an aluminum compound and a silicon oxide support,
wherein the silicon oxide support has an average particle diameter in the range between ≥20 and ≤50 μm, a pore volume in the range between ≥1.7 ml/g and ≤3 ml/g, and a surface area in the range between ≥400 m2/g and ≤800 m2/g
and
wherein the aluminum compound has the formula
R1-Al—OR2
wherein R1 is selected from (C1-C8) alkyl groups and OR2 is selected from (C1-C8) alkoxyl groups.

### Claim 2 (depends on 1)

Catalyst system according to claim 1 wherein the silicon oxide support has an average particle diameter in the range between ≥30 and ≤40 μm, a pore volume in the range between ≥1.7 ml/g and ≤1.9 ml/g, and a surface area in the range between ≥500 m2/g and ≤600 m2/g.

### Claim 3 (depends on 1)

Catalyst system according to claim 1 wherein the chromium compound is selected from chromium trioxide, chromium acetonyl acetonate, chromium acetate and/or chromium acetate hydroxide.

### Claim 4 (depends on 1)

Catalyst system according to claim 1, wherein the metal compound is a compound represented by formulas Tm(OR1)nX4-n, a compound represented by formula Tm(R2)nX4-n, or a combination thereof, wherein Tm represents a transition metal of Group IVB, VB, or VIB, R1 and R2 represent an (C1-C20) alkyl group, (C1-C20) aryl group or (C1-C20) cycloalkyl group, X represents a halogen atom, and n represents a number satisfying 0≤n≤4.

### Claim 5 (depends on 1)

Catalyst system according to claim 1 wherein the metal is selected from titanium, vanadium, hafnium and zirconium.

### Claim 6 (depends on 5)

Catalyst system according to claim 5 wherein the metal is titanium.

### Claim 7 (depends on 6)

Catalyst system according to claim 6 wherein the titanium compound is a compound according to the formulas Ti (OR1)nX4-n a compound according to the formula Ti (R2)nX4-n, or a combination thereof, wherein
R1 and R2 represent an (C1-C20) alkyl group, (C1-C20) aryl group or (C1-C20) cycloalkyl group,
X represents a halogen atom, and
n represents a number satisfying 0≤n≤4.

### Claim 8 (depends on 1)

Catalyst system according to claim 1 wherein R1 and the R2 of the aluminum compound according to the formula
R1-Al—OR2
can be the same or different.

### Claim 9 (depends on 1)

Catalyst system according to claim 1, wherein the aluminum compound is selected from diethyl aluminum ethoxide, dihexyl aluminum ethoxide, dioctyl aluminum ethoxide and/or dihexyl aluminum propoxide.

### Claim 10 (depends on 9)

Catalyst system according to claim 9, wherein the aluminum compound is diethyl aluminum ethoxide.

### Claim 11 (depends on 1)

An ethylene gas phase polymerisation process wherein the catalyst is a catalyst according to claim 1.