Silica support, preparation method thereof and metallocene catalyst using the same

Patent metadata

Field	Value
Publication number	US-9399690-B2
Application number	US-201414426656-A
Country	US
Kind code	B2
Filing date	Feb 5, 2014
Priority date	Jun 18, 2013
Publication date	Jul 26, 2016
Grant date	Jul 26, 2016

Abstract

This disclosure relates to a silica support for a metallocene catalyst used for olefin polymerization, a preparation method thereof, a metallocene catalyst using the same, and olefin polymer. Specifically, according to the present invention, a silica support used for preparing a metallocene supported catalyst is treated with a specific halogenized metal compound, thereby diversifying reaction sites to a cocatalyst when preparing a metallocene catalyst, and thus, the molecular weight distribution of produced olefin polymer may be much broadened and polymer having high molecular weight may be obtained compared to the existing support, even if the same metallocene catalyst is supported.

First claim

The invention claimed is:

1. A silica support having reaction sites including —OH, —O—MgCl, —OR 1 , —OR 2 MgCl and —OR 2 H, wherein R 1 is a C4-10 alkyl group and R 2 is a C6-10 alkylene group, on the silica surface.

2. The silica support according to claim 1 , wherein the silica support has BET surface area of 200 to 800 m 2 /g, and average particle diameter of 5 to 100 μm.

3. The silica support according to claim 1 , further comprising oxide, carbonate, sulfate or nitrate of Na 2 O, K 2 CO 3 , BaSO 4 , or Mg(NO 3 ) 2 .

4. A method for preparing a pretreated silica support according to claim 1 , comprising
(a) heat treating a silica-based support; and
(b) pretreating the heat treated silica in (a) with 0.05 to 2 mmol/g-silica of an alkoxyalkyl-alkaline earth metal-halogen compound.

5. The method for preparing a pretreated silica support according to claim 4 , wherein in the step (a), the silica-based support is heat treated at a temperature of 200 to 800° C. for 1 to 48 hours.

6. The method for preparing a pretreated silica support according to claim 4 , wherein the silica-based support is silica, silica-alumina or silica-magnesia.

7. The method for preparing a pretreated silica support according to claim 4 , wherein the silica-based support further comprises oxide, carbonate, sulfate or nitrate of Na 2 O, K 2 CO 3 , BaSO 4 , or Mg(NO 3 ) 2 .

8. The method for preparing a pretreated silica support according to claim 4 , wherein the step (b) further comprises progressing a reaction of the silica heat treated at 0 to 100° C. and an alkoxyalkyl-alkaline earth metal-halogen compound.

9. The method for preparing a pretreated silica support according to claim 4 , wherein the alkoxyalkyl-alkaline earth metal-halogen compound is represented by the following Chemical Formula 3:
R 1 OR 2 MX  [Chemical Formula 3]

wherein, R 1 is a C1-10 alkyl group, R 2 is a C1-10 alkylene group, M is an alkaline earth metal, and X is a halogen atom.

Assignees

• Lg Chemical Ltd

Inventors

• Hong Dae Sik
• Lee Ki Soo
• Kwon Heon Yong
• Kim Hyeon-Gook
• Song Eun Kyoung
• Lee Yong Ho

Classifications

• C08F110/02 Primary

  Ethene · CPC title

• B01J31/2295

  Cyclic compounds, e.g. cyclopentadienyls · CPC title

• C08F4/65916

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

• B01J2531/48

  Zirconium · CPC title

• C08F4/02

  Carriers therefor · CPC title