Electron donor for polyolefin polymerization catalysts and uses thereof

Patent metadata

Field	Value
Publication number	US-11001650-B2
Application number	US-201615751121-A
Country	US
Kind code	B2
Filing date	Aug 11, 2016
Priority date	Aug 11, 2015
Publication date	May 11, 2021
Grant date	May 11, 2021

Abstract

Disclosed in certain embodiments is an electron donor for a polyolefin polymerization catalyst. In some embodiments, a solid catalyst component includes a metal component and the electron donor that form a catalyst on a support.

First claim

What is claimed is:

1. A polyolefin catalyst comprising an aluminum alkyl, a metal component, and an electron donor of Formula II.a, III.a., III.b., IV.a., or IV.b.:

2. The polyolefin catalyst of claim 1 , wherein the metal component is titanium.

3. The polyolefin catalyst of claim 1 , further comprising a support, wherein the metal component and the electron donor form a catalyst disposed on the support.

4. The polyolefin catalyst of claim 3 , wherein the support comprises a magnesium halide.

5. The polyolefin catalyst of claim 1 , wherein the polyolefin catalyst has an activity of greater than 25 kg/g·hr.

6. The polyolefin catalyst of claim 1 , wherein the polyolefin catalyst has an activity of greater than 30 kg/g·hr.

7. The polyolefin catalyst of claim 1 , wherein the polyolefin catalyst is adapted to produce polypropylene having a polydispersity index (PI) of greater than 3.

8. The polyolefin catalyst of claim 1 , wherein the polyolefin catalyst is adapted to produce polypropylene having a xylene solubles content of less than 8% XS.

9. The polyolefin catalyst of claim 1 , wherein the polyolefin catalyst is adapted to produce polypropylene having a melt flow index of greater than 2 g/10 min.

10. A method for producing polypropylene, the method comprising:
forming a reaction mixture by mixing a silane component with a catalyst, the catalyst component comprising a titanium catalyst, an electron donor, and a magnesium halide; and
adding propylene to the reaction mixture to form a polypropylene batch, wherein a polydispersity index (PI) of the polypropylene batch is greater than 3, wherein a xylene solubles content of the polypropylene batch is less than 8% XS, and wherein a melt flow index of the polypropylene is greater than 2 g/10 min;
wherein the electron donor is of Formula II.a, III.a., III.b., IV.a., or IV.b.:

Assignees

• Grace W R & Co
• Braskem America Inc

Inventors

• Nguyen Binh Thanh
• Fernandes Jonas Alves

Classifications

• C08F110/06 Primary

  Propene · CPC title

• B01J31/02

  containing organic compounds or metal hydrides · CPC title

• B01J31/12

  containing organo-metallic compounds or metal hydrides · CPC title

• C07C43/164

  containing six-membered aromatic rings · CPC title

• C08F10/06 Primary

  Propene · CPC title