# US 10,246,535 B2 · Methods of catalyst activation

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- Number: US 10,246,535 B2
- Document ID: US10246535B2
- Status: Granted
- Kind: B2
- Application number: 14/990,899
- Filed: 2016-01-08
- Published: 2016-05-05
- Granted: 2019-04-02
- 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/US10246535B2

## 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 1

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, and wherein the catalyst activator comprises the catalyst.

### Claim 2 (depends on 1)

The method of claim 1, wherein the catalyst activator functions to maintain the catalyst activity to a user-desired threshold level throughout the polymerization process.

### Claim 3 (depends on 1)

The method of claim 1, wherein the multi-component catalyst system comprises an external electron donor.

### Claim 4 (depends on 1)

The method of claim 1, wherein the multi-component catalyst comprises a Ziegler-Natta catalyst, a metallocene catalyst, or combinations thereof.

### Claim 5 (depends on 1)

The method of claim 1, wherein the cocatalyst comprises an organoaluminum compound.

### Claim 6 (depends on 5)

The method of claim 5, wherein the organoaluminum compound comprises tri ethyl aluminum, tri-isobutylaluminum, diethylaluminum chloride, diethylaluminum hydride, methylalumoxane, tri-isobutylaluminum, or combinations thereof.

### Claim 7 (depends on 3)

The method of claim 3, wherein the electron donor comprises an external electron donor.

### Claim 8 (depends on 7)

The method of claim 7, wherein the external electron donor comprises cyclohexylmethyl dimethoxysilane, dicyclopentyl dimethoxysilane, diisopropyl dimethoxysilane, or combinations thereof.

### Claim 9 (depends on 1)

The method of claim 1, wherein multi-component catalyst system functions as a polymerization catalyst.

### Claim 10 (depends on 1)

The method of claim 1, wherein the multi-component catalyst system is introduced to a first location in a reaction zone and the catalyst activator is introduced to a second location in the reaction zone.

### Claim 11 (depends on 10)

The method of claim 10, wherein the reaction zone comprises multiple reactor types.

### Claim 12 (depends on 1)

The method of claim 1, wherein the polymerization process is a polymerization process for the production of a polypropylene impact copolymer.