Ziegler-Natta catalyst system having a thermally treated magnesium chloride component

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United States of America Patent

PATENT NO 11857935
APP PUB NO 20210205785A1
SERIAL NO

17056534

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Abstract

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A heterogeneous procatalyst includes a titanium species, a magnesium chloride component, and a chlorinating agent having a structure A(Cl)x(R1)3-x, where A is aluminum or boron, R1 is a (C1-C30) hydrocarbyl, and x is 1, 2, or 3. The magnesium chloride component may be thermally treated at a temperature greater than 100 C for at least 30 minutes before or after introduction of the chlorinating agent and titanium species to the heterogeneous procatalyst. The heterogeneous procatalyst having the thermally treated magnesium chloride exhibits improved average molecular weight capability. Processes for producing the heterogeneous procatalyst and processes for producing ethylene-based polymers utilizing the heterogeneous procatalyst are also disclosed.

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Patent Owner(s)

  • DOW GLOBAL TECHNOLOGIES LLC

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Barton, David Gordon Midland, US 3 2
Heitsch, Andrew T Angleton, US 19 4
Hirsekorn, Kurt F Sugar Land, US 21 194
Nickias, Peter N Midland, US 58 1501
Onam, Sadeka Midland, US 4 3
Peterson, Thomas H Midland, US 55 1481
Yu, Mingzhe Midland, US 4 2

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