IP Library › Granted Patent US 7,144,964
Granted Patent B2
US 7,144,964 · App. 10/921,687 · Granted Dec 5, 2006

Solution polymerization process utilizing preassembled bimetallic Ziegler-Natta catalyst

Assignee: Equistar Chemicals, L.P.
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Quick Facts
Patent No.
US 7,144,964
App. No.
10/921,687
Granted
Dec 5, 2006
Kind
B2
Abstract

A high-temperature solution process for polymerizing ethylene is disclosed. The polymerization is performed in the presence of a preassembled bimetallic Ziegler-Natta catalyst and an aluminum compound. Molecular modeling calculations predict that the bimetallic Ziegler-Natta catalyst will have good activity and improved stability versus traditional Ziegler-Natta catalysts. This makes the catalyst especially suitable for solution polymerization processes, which require a thermally robust catalyst.

Claims (4)

1. A process which comprises polymerizing ethylene in solution at a temperature greater than 120° C. in the presence of an aluminum compound and a preassembled bimetallic Ziegler-Natta catalyst having the general formula:

wherein M′ is a Group 4–6 transition metal different from V; each L is independently selected from the group consisting of halide, oxy, alkoxy, aryloxy, mercapto, siloxy, aluminoxy, borate, alkylamino, and C 1 –C 30 hydrocarbyl; L′ is selected from the group consisting of halide, oxy, alkoxy, aryloxy, mercapto, siloxy, aluminoxy, borate, alkylamino, arylamino, and —OGO— wherein G is a linking group containing silicon, boron, aluminum, or two pi-bonded carbons; x satisfies the valence of M′ and y satisfies the valence of V.

2. The process of claim 1 wherein M′ is titanium.

3. The process of claim 1 wherein L is siloxy, aluminoxy, or borate.

Assignments (18)
RELEASE OF SECURITY INTEREST Recorded Jan 22, 2014
From: WELLS FARGO BANK, NATIONAL ASSOCIATION
To: EQUISTAR CHEMICALS, LP
Reel/Frame 032112/0786 →
APPOINTMENT OF SUCCESSOR ADMINISTRATIVE AGENT Recorded Jan 22, 2014
From: UBS AG, STAMFORD BRANCH
To: BANK OF AMERICA, N.A.
Reel/Frame 032112/0863 →
RELEASE OF SECURITY INTEREST Recorded Jan 22, 2014
From: CITIBANK, N.A.
To: EQUISTAR CHEMICALS, LP
Reel/Frame 032113/0644 →
RELEASE OF SECURITY INTEREST Recorded Jan 22, 2014
From: DEUTSCHE BANK TRUST COMPANY AMERICAS
To: EQUISTAR CHEMICALS, LP
Reel/Frame 032113/0684 →
RELEASE OF SECURITY INTEREST Recorded Jan 22, 2014
From: BANK OF AMERICA, N.A.
To: EQUISTAR CHEMICALS, LP
Reel/Frame 032113/0730 →
SECURITY AGREEMENT Recorded May 19, 2010
From: EQUISTAR CHEMICALS, LP
To: WELLS FARGO BANK, NATIONAL ASSOCIATION, AS COLLATERAL AGENT
Reel/Frame 024402/0655 →
SECURITY AGREEMENT Recorded May 18, 2010
From: EQUISTAR CHEMICALS, LP
To: CITIBANK, N.A., AS ADMINISTRATIVE AGENT
Reel/Frame 024397/0861 →
SECURITY AGREEMENT Recorded May 7, 2010
From: EQUISTAR CHEMICALS. LP
To: UBS AG, STAMFORD BRANCH, AS COLLATERAL AGENT
Reel/Frame 024351/0001 →
SECURITY AGREEMENT Recorded May 6, 2010
From: EQUISTAR CHEMICALS, LP
To: DEUTSCHE BANK TRUST COMPANY AMERICAS, AS COLLATERAL AGENT
Reel/Frame 024342/0443 →
RELEASE OF SECURITY INTEREST Recorded May 5, 2010
From: CITIBANK, N.A., AS COLLATERAL AGENT
To: LYONDELL CHEMICAL TECHNOLOGY, L.P.; EQUISTAR CHEMICALS, LP
Reel/Frame 024337/0856 →
RELEASE OF SECURITY INTEREST Recorded May 5, 2010
From: UBS AG, STAMFORD BRANCH, AS COLLATERAL AGENT
To: EQUISTAR CHEMICALS, LP
Reel/Frame 024337/0186 →
RELEASE OF SECURITY INTEREST Recorded May 5, 2010
From: CITIBANK, N.A., AS COLLATERAL AGENT
To: LYONDELL CHEMICAL TECHNOLOGY, L.P.; EQUISTAR CHEMICALS, LP
Reel/Frame 024337/0705 →
RELEASE OF SECURITY INTEREST Recorded May 4, 2010
From: CITIBANK, N.A., AS COLLATERAL AGENT
To: EQUISTAR CHEMICALS, LP
Reel/Frame 024329/0535 →
SECURITY AGREEMENT Recorded Oct 30, 2009
From: EQUISTAR CHEMICALS, LP
To: UBS AG, STAMFORD BRANCH, AS COLLATERAL AGENT
Reel/Frame 023449/0687 →
SECURITY AGREEMENT Recorded Apr 9, 2009
From: EQUISTAR CHEMICALS, LP
To: CITIBANK, N.A., AS ADMINISTRATIVE AGENT AND COLLATERAL AGENT
Reel/Frame 022678/0860 →
SECURITY AGREEMENT Recorded Aug 4, 2008
From: BASELL POLYOLEFINE GMBH; ARCO CHEMICAL TECHNOLOGY L.P.; ARCO CHEMICAL TECHNOLOGY, INC.; ATLANTIC RICHFIELD COMPANY; BASELL NORTH AMERICA, INC.; BASELL POLYOLEFIN GMBH; LYONDELL CHEMICAL COMPANY; EQUISTAR CHEMICALS, L.P.
To: CITIBANK, N.A., AS COLLATERAL AGENT
Reel/Frame 021354/0708 →
GRANT OF SECURITY INTEREST IN UNITED STATES PATENTS AND PATENT APPLICATIONS Recorded Mar 26, 2008
From: BASELL POLYOLEFINE GMBH; ARCO CHEMICAL TECHNOLOGY L.P.; ARCO CHEMICAL TECHNOLOGY, INC.; ATLANTIC RICHFIELD COMPANY; BASELL NORTH AMERICA, INC.; EQUISTAR CHEMICALS. LP.; LYONDELL CHEMICAL COMPANY; LYONDELL CHEMICAL TECHNOLOGY, L.P.; LYONDELL PETROCHEMICAL COMPANY; NATIONAL DISTILLERS AND CHEMICAL CORPORATION; OCCIDENTAL CHEMICAL CORPORATION; OLIN CORPORATION; QUANTUM CHEMICAL CORPORATION; BASELL POLYOLEFIN GMBH
To: CITIBANK, N.A., AS COLLATERAL AGENT
Reel/Frame 020704/0562 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Oct 29, 2004
From: NAGY, SANDOR; MACK, MARK P.
To: EQUISTAR CHEMICALS, LP
Reel/Frame 015933/0842 →
Continuity (1)
Related Publication 20060041088A1 · Feb 23, 2006