Chromium compound, catalyst system including same, and method for trimerizing ethylene using the catalyst system

Patent metadata

Field	Value
Publication number	US-10442741-B2
Application number	US-201515123878-A
Country	US
Kind code	B2
Filing date	Mar 4, 2015
Priority date	Mar 5, 2014
Publication date	Oct 15, 2019
Grant date	Oct 15, 2019

Abstract

Disclosed herein are a chromium compound represented by Formula 1a or 1b and a catalyst system including the same, exhibiting superior catalytic activity in an olefin trimerization reaction:

[{CH 3 (CH 2 ) 3 CH(CH 2 CH 3 )CO 2 } 2 Cr(OH)]  [Formula 1a]

[{CH 3 CH 2 CH(CH 2 CH 3 )CO 2 } 2 Cr(OH)].  [Formula 1b]

First claim

The invention claimed is:

1. A catalyst for polymerizing olefins, comprising a reaction product of:
a chromium compound represented by Formula 1c below;
an aluminum compound represented by Formula 3 below; and
an alumino-pyrrole compound represented by Formula 5 below:
[{CH 3 (CH 2 ) 3 CH(CH 2 CH 3 )CO 2 } 2 Cr(OH)] 4 ·2H 2 O;  [Formula 1c]

(R 2 ) n Al(X 2 ) 3-n ,  [Formula 3]

wherein R 2 is a C 1 or C 2 hydrocarbon group, X 2 is a halogen atom, and an average value of n is 1 to 3; and

wherein R 2 is a C 1 or C 2 hydrocarbon group and R 3 , R 4 , R 5 , and R 6 are each independently a hydrogen atom or a C 1 or C 2 alkyl group,
wherein the compound of Formula 1c is obtained by the method of Preparation Example 3.

2. The catalyst according to claim 1 , wherein the aluminum compound is a mixture of triethylaluminum (Et 3 Al) and diethylaluminumchloride (Et 2 AlCl), the alumino-pyrrole compound is a compound represented by Formula 5 wherein R 2 is an ethyl group, R 3 and R 6 are methyl groups, and R 4 and R 5 are hydrogen atoms.

3. The catalyst according to claim 1 , wherein, in the catalyst system, a molar ratio of the chromium compound to the aluminum compound (Cr:Al) added upon preparation (reaction) is 1:10 to 1:50.

4. The catalyst according to claim 1 , wherein, in the catalyst system, a molar ratio of the chromium compound to the alumino-pyrrole compound (chromium compound:alumino-pyrrole compound) added upon preparation (reaction) is 1:1 to 1:5.

5. The catalyst according to claim 1 , wherein the catalyst system further comprises an aliphatic hydrocarbon solvent.

Assignees

• Univ Ajou Ind Academic Coop Found

Inventors

• Lee Bun Yeoul
• Jeon Jong Yeob
• Park Dong Sik

Classifications

• C07F11/00

  Compounds containing elements of Groups 6 or 16 of the Periodic Table · CPC title

• B01J31/12

  containing organo-metallic compounds or metal hydrides · CPC title

• B01J2231/12

  Olefin polymerisation or copolymerisation · CPC title

• B01J31/181

  Cyclic ligands, including e.g. non-condensed polycyclic ligands, comprising at least one complexing nitrogen atom as ring member, e.g. pyridine · CPC title

• B01J2531/0205

  Bi- or polynuclear complexes, i.e. comprising two or more metal coordination centres, without metal-metal bonds, e.g. Cp(Lx)Zr-imidazole-Zr(Lx)Cp · CPC title