Activation of titanium-based single-site catalysts for ethylene polymerization using supports of type MgCl2/A1Rn(OEt)3-n

J.R. Severn, J.C. Chadwick

Research output: Contribution to journalArticleAcademicpeer-review

39 Citations (Scopus)

Abstract

Easy and effective immobilization and activation of a range of Ti-based single-site catalysts for ethylene polymerization has been achieved, without methylaluminoxane or borate activators, using MgCl2/AlRn(OEt)3-n supports obtained by reaction of AlR3 with adducts of magnesium chloride and ethanol. The use of relatively low catalyst loadings leads to efficient uptake by the support and gives high catalyst activity. Catalyst immobilization using these MgCl2-based supports also leads to stable polymerization kinetics, with negligible decay in catalyst activity during polymerization. Metallocene, half-metallocene, and non-metallocene catalysts have been used, particularly high activities being obtained using cyclopentadienyl titanium trichloride and its analogues. The polyethylenes obtained have narrow molecular weight distribution, with generally in the range 2-3, indicating retention of single-site catalyst characteristics after immobilization. Spherical polymer particle morphology was achieved, without reactor fouling.
Original languageEnglish
Pages (from-to)1987-1994
JournalMacromolecular Chemistry and Physics
Volume205
Issue number15
DOIs
Publication statusPublished - 2004

Fingerprint

Magnesium Chloride
Titanium
Catalyst supports
Ethylene
ethylene
polymerization
titanium
Chemical activation
Polymerization
activation
catalysts
Catalysts
immobilization
Catalyst activity
Polyethylenes
Borates
Molecular weight distribution
Fouling
magnesium chlorides
Magnesium

Cite this

@article{df4bc04b44324155b9b0f3f9b1d5fd2d,
title = "Activation of titanium-based single-site catalysts for ethylene polymerization using supports of type MgCl2/A1Rn(OEt)3-n",
abstract = "Easy and effective immobilization and activation of a range of Ti-based single-site catalysts for ethylene polymerization has been achieved, without methylaluminoxane or borate activators, using MgCl2/AlRn(OEt)3-n supports obtained by reaction of AlR3 with adducts of magnesium chloride and ethanol. The use of relatively low catalyst loadings leads to efficient uptake by the support and gives high catalyst activity. Catalyst immobilization using these MgCl2-based supports also leads to stable polymerization kinetics, with negligible decay in catalyst activity during polymerization. Metallocene, half-metallocene, and non-metallocene catalysts have been used, particularly high activities being obtained using cyclopentadienyl titanium trichloride and its analogues. The polyethylenes obtained have narrow molecular weight distribution, with generally in the range 2-3, indicating retention of single-site catalyst characteristics after immobilization. Spherical polymer particle morphology was achieved, without reactor fouling.",
author = "J.R. Severn and J.C. Chadwick",
year = "2004",
doi = "10.1002/macp.200400270",
language = "English",
volume = "205",
pages = "1987--1994",
journal = "Macromolecular Chemistry and Physics",
issn = "1022-1352",
publisher = "Wiley-VCH Verlag",
number = "15",

}

Activation of titanium-based single-site catalysts for ethylene polymerization using supports of type MgCl2/A1Rn(OEt)3-n. / Severn, J.R.; Chadwick, J.C.

In: Macromolecular Chemistry and Physics, Vol. 205, No. 15, 2004, p. 1987-1994.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Activation of titanium-based single-site catalysts for ethylene polymerization using supports of type MgCl2/A1Rn(OEt)3-n

AU - Severn, J.R.

AU - Chadwick, J.C.

PY - 2004

Y1 - 2004

N2 - Easy and effective immobilization and activation of a range of Ti-based single-site catalysts for ethylene polymerization has been achieved, without methylaluminoxane or borate activators, using MgCl2/AlRn(OEt)3-n supports obtained by reaction of AlR3 with adducts of magnesium chloride and ethanol. The use of relatively low catalyst loadings leads to efficient uptake by the support and gives high catalyst activity. Catalyst immobilization using these MgCl2-based supports also leads to stable polymerization kinetics, with negligible decay in catalyst activity during polymerization. Metallocene, half-metallocene, and non-metallocene catalysts have been used, particularly high activities being obtained using cyclopentadienyl titanium trichloride and its analogues. The polyethylenes obtained have narrow molecular weight distribution, with generally in the range 2-3, indicating retention of single-site catalyst characteristics after immobilization. Spherical polymer particle morphology was achieved, without reactor fouling.

AB - Easy and effective immobilization and activation of a range of Ti-based single-site catalysts for ethylene polymerization has been achieved, without methylaluminoxane or borate activators, using MgCl2/AlRn(OEt)3-n supports obtained by reaction of AlR3 with adducts of magnesium chloride and ethanol. The use of relatively low catalyst loadings leads to efficient uptake by the support and gives high catalyst activity. Catalyst immobilization using these MgCl2-based supports also leads to stable polymerization kinetics, with negligible decay in catalyst activity during polymerization. Metallocene, half-metallocene, and non-metallocene catalysts have been used, particularly high activities being obtained using cyclopentadienyl titanium trichloride and its analogues. The polyethylenes obtained have narrow molecular weight distribution, with generally in the range 2-3, indicating retention of single-site catalyst characteristics after immobilization. Spherical polymer particle morphology was achieved, without reactor fouling.

U2 - 10.1002/macp.200400270

DO - 10.1002/macp.200400270

M3 - Article

VL - 205

SP - 1987

EP - 1994

JO - Macromolecular Chemistry and Physics

JF - Macromolecular Chemistry and Physics

SN - 1022-1352

IS - 15

ER -