Process of polymerization catalyst production with controlled catalyst properties and use of same in olefin polymerizations

Patent metadata

Field	Value
Publication number	US-9593182-B2
Application number	US-201314075691-A
Country	US
Kind code	B2
Filing date	Nov 8, 2013
Priority date	Nov 8, 2012
Publication date	Mar 14, 2017
Grant date	Mar 14, 2017

Abstract

Solid catalyst components for use in olefin polymerization, systems incorporating the same, methods of producing the same, and methods of use are disclosed. The solid catalyst components are formed by (a) dissolving a magnesium compound and an auxiliary intermediate electron donor in at least one first solvent to form a solution; (b) contacting a first titanium compound with said solution to form a precipitate of the magnesium compound and the first titanium compound; (c) washing the precipitate with a mixture of a second titanium compound and at least one second solvent and optionally an electron donor at a temperature of up to 90° C.; and (d) treating the precipitate with a mixture of a third titanium compound and at least one third solvent at 90-150° C. to form a solid catalyst component.

First claim

What is claimed is:

1. A process for preparing a solid catalyst component for use in olefinic polymerization, said process comprising the following steps:
(a) dissolving a magnesium compound and an auxiliary intermediate electron donor in at least one first solvent to form a first mixture;
(b) contacting a first titanium compound with said first mixture to form a precipitate of the magnesium compound and the first titanium compound;
(c) separating the precipitate from said first mixture and removing side products from the precipitate prior to step (d) by washing the precipitate with a second mixture comprising a second titanium compound and at least one second solvent at a wash temperature below 90° C. to generate a washed precipitate, wherein said washing is performed without performing any intervening washes or reactions of the precipitate in between said separating and said washing; and
(d) activating the washed precipitate by treating the washed precipitate with a third mixture of a third titanium compound and at least one third solvent at an activation temperature of 90-150° C. to form the solid catalyst component.

2. The process of claim 1 , wherein at least one of said first, second, or third titanium compound is a titanium halide.

3. The process of claim 2 , wherein said titanium halide is TiCl 4 .

4. The process of claim 1 , wherein in step (a) said at least one first solvent comprises at least one compound selected from the group consisting of alcohol, epoxy compound, and phosphorus compound.

5. The process of claim 4 , wherein the epoxy compound comprises at least one compound selected from the group consisting of aliphatic epoxy compounds, alicyclic epoxy compounds, and aromatic epoxy compounds.

6. The process of claim 1 , wherein step (b), (c) and/or (d) further comprises adding an electron donor and/or an auxiliary intermediate electron donor.

7. The process of claim 6 , wherein said electron donor is a carboxylic acid ester or organic compound containing keto and ether groups.

8. The process of claim 7 , wherein said carboxylic acid ester is a phthalate.

9. The process of claim 1 , wherein in step (c) and/or (d) said at least one second solvent and/or said at least one third solvent comprises a compound selected from the group consisting of toluene and ethyl benzene.

10. The process of claim 1 , wherein in step (c) said second titanium compound is at a concentration of from about 5% to about 50% of the second mixture.

11. The process of claim 1 , wherein said auxiliary intermediate electron donor reacts with titanium halide to form a secondary electron donor with chlorine atom and is selected from a group consisting of aldehydes, anhydrides, ketones, and esters.

12. The process of claim 1 , wherein said auxiliary intermediate electron donor is phthalic anhydride.

13. The process of claim 1 , wherein the magnesium compound comprises at least one compound selected from the group consisting of magnesium chloride, magnesium bromide, magnesium iodide, magnesium fluoride, methoxy magnesium chloride, ethoxy magnesium chloride, isopropoxy magnesium chloride, butoxy magnesium chloride, octoxy magnesium chloride, phenoxy magnesium chloride, methylphenoxy magnesium chloride, ethoxy magnesium, isopropoxy magnesium, butoxy magnesium, n-octoxy magnesium, 2-ethyloxy magnesium, phenoxy magnesium, dimethylphenoxy magnesium, magnesium laurate and magnesium stearate.

14. The process of claim 1 , wherein said magnesium compound is MgCl 2 .

Assignees

• Basf Corp
• W R Grace & Co -Conn

Inventors

• Marin Vladimir P
• Hintolay Ahmed
• Spencer Michael Donald

Classifications

• C08F110/06 Primary

  Propene · CPC title

• C08F4/651

  Pretreating with non-metals or metal-free compounds · CPC title

• C08F4/6545

  and metals of C08F4/64 or compounds thereof · CPC title

• C08F2500/12

  Melt flow index or melt flow ratio · CPC title

• C08F2500/18

  Bulk density · CPC title