Producing polyolefin products

Patent metadata

Field	Value
Publication number	US-10604605-B2
Application number	US-201816215902-A
Country	US
Kind code	B2
Filing date	Dec 11, 2018
Priority date	Mar 15, 2013
Publication date	Mar 31, 2020
Grant date	Mar 31, 2020

Abstract

Catalyst systems and methods for making and using the same are described herein. A catalyst system can include at least three catalysts. The three catalysts include a metallocene catalyst, a first non-metallocene including a ligand complexed to a metal through two or more nitrogen atoms, and a second non-metallocene including a ligand complexed to a metal through one or more nitrogen atoms and an oxygen atom.

First claim

What is claimed is:

1. A method for generating a polyethylene polymer, comprising reacting at least ethylene with a catalyst system comprising at least three commonly supported catalysts, comprising:
a metallocene catalyst;
a first non-metallocene comprising a ligand complexed to a metal through two or more nitrogen atoms; and
a second non-metallocene comprising a ligand complexed to a metal through a nitrogen atom and at least one oxygen atom.

2. The method of claim 1 , comprising forming a spray dried catalyst including the metallocene catalyst, the first non-metallocene, and the second non-metallocene.

3. The method of claim 1 , comprising continuously combining a catalyst component slurry with a catalyst component solution to form a commonly supported catalyst system including the metallocene catalyst, the first non-metallocene, and the second non-metallocene.

4. The method of claim 3 , wherein the catalyst component slurry comprises the first non-metallocene and the catalyst component solution comprises the second non-metallocene.

5. The method of claim 3 , further comprising:
measuring a sample of the polyethylene polymer to obtain an initial product property; and
changing a process parameter to obtain a second product property, based, at least in part, on the initial product property.

6. The method of claim 5 , wherein measuring a sample of the polyethylene polymer comprises measuring comonomer incorporation as a function of a molecular weight.

7. The method of claim 5 , wherein measuring a sample of the polyethylene polymer comprises determining a physical property.

8. The method of claim 5 , wherein measuring a sample of the polyethylene polymer comprises determining a flow index, a melt index, a density, a molecular weight distribution, a comonomer content, or combinations thereof.

9. The method of claim 5 , wherein changing a process parameter comprises adjusting an amount of the catalyst component solution that is combined with the catalyst component slurry.

10. The method of claim 1 , further comprising adjusting a ratio of a comonomer to ethylene within a polymerization reactor to control at least one of a composition distribution, a molecular weight distribution, and a melt index (I 2 ) of the polyethylene polymer.

11. The method of claim 1 , comprising adjusting a ratio of hydrogen to ethylene within a polymerization reactor to control at least one of a composition distribution, a molecular weight distribution, and a melt index (I 2 ) of the polyethylene polymer.

12. The method of claim 1 , comprising making a catalyst system comprising {[(2,3,4,5,6-Me 5 C 6 )NCH 2 CH 2 ] 2 NH}ZrBn 2 , {[(2,3,4,5,6-Me 5 C 6 )NCH 2 CH 2 ] 2 O}ZrBn 2 , and bis(n-butyl cyclopentadienyl)zirconium dichloride.

13. The method of claim 1 , comprising making a catalyst system comprising {[(2,3,4,5,6-Me 5 C 6 )NCH 2 CH 2 ] 2 NH}ZrBn 2 , {[(2,3,4,5,6-Me 5 C 6 )NCH 2 CH 2 ] 2 O}ZrBn 2 , and bis(n-butyl cyclopentadienyl)zirconium dichloride, in a ratio of about 3.5:2:1.

Assignees

• Univation Tech Llc

Inventors

• Wagner Juliet Bauer
• Giesbrecht Garth R
• Kao Sun-Chueh
• Jaker Stephen P

Classifications

• C08F4/65912

  in combination with an organoaluminium compound · CPC title

• C08F4/65908

  in combination with an ionising compound other than alumoxane, e.g. (C6F5)4B-X+ · CPC title

• C08F4/65916

  supported on a carrier, e.g. silica, MgCl2, polymer · CPC title

• C08F210/16 Primary

  Copolymers of ethene with alpha-alkenes, e.g. EP rubbers · CPC title

• C08F10/00 Primary

  Homopolymers and copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond · CPC title