# US 2019/0169331 A1 · Methods of Catalyst Activation

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- Number: US 2019/0169331 A1
- Document ID: US20190169331A1
- Status: Published application
- Kind: A1
- Application number: 16/270,699
- Filed: 2019-02-08
- Published: 2019-06-06
- Earliest claimed: 2008-11-17
- Assignees: Fina Technology, Inc.
- Applicants: Fina Technology, Inc.
- Inventors: Kenneth P. Blackmon; David Ribour; Shabbir Malbari; Tim Coffy; Michel Daumerie
- Web page: https://patentgrep.com/patent/US20190169331A1

## CPC

- C08F 210/06: Propene
- C08F 10/00: Homopolymers and copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS

## Abstract

A method comprising preparing a multi-component catalyst system comprising a catalyst and a cocatalyst, and adjusting the level of at least one component of the catalyst system to maintain a user-desired level of catalyst activity throughout a process, wherein the component comprises a catalyst activator and wherein the catalyst activator comprises the catalyst or the cocatalyst. A method comprising contacting a polymerization catalyst system comprising a Ziegler-Natta catalyst and a cocatalyst with a catalyst activator at least twice during a polymerization process, wherein the polymerization process is carried out in a reactor system comprising multiple reactor types.

## Claims

### Claim at position 1

-26. (canceled)

### Claim 27

A method comprising:
preparing a multi-component catalyst system comprising a catalyst and a cocatalyst; and
adjusting a level of at least one component of the multi-component catalyst system to maintain a user-desired level of catalyst activity throughout a polymerization process;
wherein the at least one component comprises a catalyst activator, wherein the catalyst activator is the cocatalyst, wherein an amount of the cocatalyst introduced to a reaction zone is reduced as compared to an amount of the cocatalyst normally present in the polymerization process and an amount of catalyst introduced to the reaction zone is increased compared to an amount of the catalyst normally present in the polymerization process, wherein the amount of increase in the catalyst is between 10% and 25% and the amount of reduction in the cocatalyst is between 20% and 40%.

### Claim 28 (depends on 27)

The method of claim 27, wherein the catalyst activator functions to maintain the catalyst system activity to a user-desired threshold level throughout the polymerization process.

### Claim 29 (depends on 27)

The method of claim 27, wherein the multi-component catalyst system further comprises an electron donor.

### Claim 30 (depends on 27)

The method of claim 27, wherein the catalyst activator consists essentially of one of the catalyst, the cocatalyst, or an electron donor.

### Claim 31 (depends on 27)

The method of claim 27, wherein the multi-component catalyst comprises a Ziegler-Natta catalyst, a metallocene catalyst, or combinations thereof.

### Claim 32 (depends on 27)

The method of claim 27, wherein the cocatalyst comprises an organoaluminum compound.

### Claim 33 (depends on 32)

The method of claim 32, wherein the organoaluminum compound comprises triethylaluminum, tri-isobutylaluminum, diethylaluminum chloride, diethylaluminum hydride, methylalumoxane, tri-isobutylaluminum, or combinations thereof.

### Claim 34 (depends on 27)

The method of claim 27, wherein the multi-component catalyst system functions as a polymerization catalyst.