Catalyst components for the polymerization of olefins

Patent metadata

Field	Value
Publication number	US-11267910-B2
Application number	US-201816613655-A
Country	US
Kind code	B2
Filing date	May 9, 2018
Priority date	May 18, 2017
Publication date	Mar 8, 2022
Grant date	Mar 8, 2022

Abstract

A catalyst mixture made from or containing (a) particles of a solid catalyst component comprising Ti, Mg, Cl, and (b) from 0.5 to 5.0% by weight, based upon the total weight of the mixture, of particles of a solid compound having particle size ranging from 0.1 μm to 1 mm containing more than 50% by weight of SiO2 units.

First claim

What is claimed is:

1. A catalyst mixture comprising:
a mechanical mixture of
(a) particles of a solid catalyst component comprising titanium (Ti), magnesium (Mg), and chloride (Cl), and
(b) from 0.2 to 5.0% by weight, based upon the total weight of the catalyst mixture (a)+(b), of particles of a solid compound having a particle size ranging from 0.1 μm to 1 mm and containing more than 50% by weight of SiO 2 units.

2. The catalyst mixture of claim 1 wherein the solid compound (b) containing more than 50% by weight of SiO 2 units is selected from the group consisting of silica, silicates, diatomaceous earth, and a combination thereof.

3. The catalyst mixture of claim 2 wherein the solid compound (b) containing more than 50% by weight of SiO 2 units is a silicate selected from phyllosilicates.

4. The catalyst mixture of claim 3 wherein the phyllosilicate is talc.

5. The catalyst mixture of claim 1 wherein the solid compound (b) has particle size ranging from 2 to 800 μm.

6. The catalyst mixture of claim 1 wherein the solid compound (b) containing more than 50% by weight of SiO 2 units is a silica.

7. The catalyst mixture of claim 6 wherein the silica is crystalline silica.

8. The catalyst mixture of claim 7 wherein the crystalline silica has a particle size ranging from 0.1 to 5 μm.

9. The catalyst mixture of claim 1 wherein the particle size of the solid catalyst component (a) ranges from 4 to 120 μm.

10. The catalyst mixture of claim 9 wherein the solid catalyst component (a) has a sphericity factor higher than 0.60.

11. The catalyst mixture of claim 10 wherein the solid catalyst component (a) has a sphericity factor higher than 0.7 and a particle size ranging from 10 to 90 μm.

12. The catalyst mixture according to claim 1 , wherein the amount of particles of solid compound (b) ranges from 0.5 to 5% wt, based on the total weight of catalyst mixture (a)+(b).

13. The catalyst mixture of claim 1 , wherein the solid catalyst component (a) further comprises an electron donor selected from the group consisting of esters, ethers, amines, silanes, carbamates and ketones and mixtures thereof.

14. A catalyst system for the homopolymerization or copolymerization of olefins CH 2 ═CHR, wherein R is hydrogen or a hydrocarbyl radical with 1-12 carbon atoms, comprising:
the product obtained by contacting:
(i) the catalyst mixture according to claim 1 ;
(ii) an alkylaluminum compound and,
(iii) optionally an external electron donor compound.

15. A process for the homopolymerization or copolymerization of olefins CH 2 ═CHR, wherein R is hydrogen or a hydrocarbyl radical with 1-12 carbon atoms, carried out in the presence of the catalyst system according to claim 14 .

Assignees

• Basell Poliolefine Italia Srl

Inventors

• Brita Diego
• Guidotti Simona

Classifications

• C08F4/025

  Metal oxides · CPC title

• C08F4/646

  Catalysts comprising at least two different metals, in metallic form or as compounds thereof, in addition to the component covered by group C08F4/64 {(C08F4/64003 - C08F4/64196 take precedence)} · CPC title

• C08F4/02

  Carriers therefor · CPC title

• C08F10/00

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

• B01J37/04

  Mixing {(B01J37/0009, B01J37/0018 take precedence)} · CPC title