# US 5,350,724 A · Polyolefin polymerization process, process of producing catalyst, and catalyst

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- Number: US 5,350,724 A
- Document ID: US5350724A
- Status: Granted
- Kind: A
- Application number: 08/058,167
- Filed: 1993-05-04
- Granted: 1994-09-27
- Earliest claimed: 1993-05-04
- Assignees: Phillips Petroleum Company
- Inventors: Joel L. Martin
- Web page: https://patentgrep.com/patent/US5350724A

## CPC

- B01J 31/143: {of aluminium}
- B01J 31/0274: {containing silicon (ligands in coordination complexes B01J31/1608)}
- B01J 31/128: {Mixtures of organometallic compounds}
- B01J 31/38: of titanium, zirconium or hafnium
- C08F 10/00: Homopolymers and copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
- B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS

## Abstract

A process for preparing a polymerization catalyst useful for the polymerization of olefins is provided comprising contacting a magnesium compound and a transition metal halide to form a solid product; contacting the solid product with an organoaluminum halide to form a first catalyst component, and contacting the first catalyst component with an activating agent to form a catalyst. Other aspects of the invention provide a catalyst prepared by the above described method and a polymerization process employing the thus prepared catalyst.

## Claims

### Claim 1

A process for preparing a polymerization catalyst comprising
(1) contacting a magnesium compound, a 4-phenylphenol, and titanium tetrachloride to form a solid product,
wherein said magnesium compound is a dialkylmagnesium compound wherein each alkyl group contains 1 to 12 carbon atoms;
(2) contacting said solid product and an organoaluminum halide to form a first catalyst component,
wherein said organoaluminum halide contains at least one hydrocarbyl radical selected from hydrocarbyl radicals containing 1 to 12 carbon atoms per radical; and
(3) contacting said first catalyst component and an activating agent to form said catalyst,
wherein said activating agent is titanium tetrachloride, silicon tetrachloride, C.sub.6 H.sub.5 SiCl.sub.3, or mixtures thereof.

### Claim 2 (depends on 1)

A process according to claim 1 wherein said magnesium compound is a dialkylmagnesium compound wherein each alkyl group contains 1 to 6 carbon atoms.

### Claim 3 (depends on 2)

A process according to claim 2 wherein said magnesium compound is a dibutylmagnesium compound.

### Claim 4 (depends on 1)

A process according to claim 1 wherein said phenol and said magnesium compound are contacted prior to contacting with said titanium tetrachloride.

### Claim 5 (depends on 1)

A process according to claim 1 wherein said organoaluminum halide is ethylaluminum sesquichloride.

### Claim 6 (depends on 1)

A process according to claim 1 wherein the molar ratio of said titanium tetrachloride in said solid product to said magnesium compound is within the range of about 0.1: to about 10:1;
wherein the molar ratio of said titanium tetrachloride in said first catalyst component to said organoaluminum halide is within the range of about 0.1:1 to about 10:1; and
wherein the weight ratio of said activating agent to said first catalyst component is within the range of about 0.1:1 to about 100:1.

### Claim 7 (depends on 1)

A catalyst produced according to the process of claim 1.

### Claim 8

A process for preparing a polymerization catalyst comprising:
(1) contacting dibutylmagnesium, a 4-phenylphenol, and then titanium tetrachloride to form a solid product;
(2) contacting said solid product and ethylaluminum sesquichloride to form a first catalyst component; and
(3) contacting said first catalyst component and an activating agent to form said catalyst,
wherein said activating agent is titanium tetrachloride, silicon tetrachloride, C.sub.6 H.sub.5 SiCl.sub.3, or mixtures thereof.

### Claim 9 (depends on 8)

A process according to claim 8 wherein the molar ratio of said titanium tetrachloride in said solid product to said dibutylmagnesium is within the range of 0.2:1 to 2:1;
wherein the molar ratio of said titanium tetrachloride in said first catalyst component to said ethylaluminum sesquichloride is within the range of 0.1:1 to 3:1; and
wherein the weight ratio of said activating agent to said catalyst is within the range of 0.5:1 to 75:1.

### Claim 10 (depends on 8)

A catalyst produced according to the process of claim 8.