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Catalyst composition with mixed selectivity control agent and polymerisation method using it

A composition and catalyst technology, applied in chemical instruments and methods, organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, etc., can solve problems such as reactor shutdown and production destruction

Active Publication Date: 2011-09-14
WR GRACE & CO CONN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Excessive heat generation and / or insufficient heat removal can easily disrupt production and / or shut down the reactor

Method used

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  • Catalyst composition with mixed selectivity control agent and polymerisation method using it
  • Catalyst composition with mixed selectivity control agent and polymerisation method using it
  • Catalyst composition with mixed selectivity control agent and polymerisation method using it

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0158] (1) Pre-catalyst

[0159] A. Procatalyst V10B is a commercial SHAC TM 320 catalyst containing 2.52 wt% Ti and 10.34 wt% di-isobutylphthalate (DiBP).

[0160] B. Procatalyst 1910-29-2 was prepared according to the procedure for catalyst 4949-25-1 in US Provisional Patent Application No. 61 / 141,902, filed December 31, 2008, the entire contents of which are hereby incorporated by reference. Procatalyst 1910-29-2 contained 3.61 wt% Ti and 14.85 wt% 3-methyl-5-tert-butyl-1,2-phenylene dibenzoate.

[0161] (2) External electron donor components:

[0162] 592420: (Triethoxysilyl)cyclohexane

[0163] BPIQ-bis(perhydroisoquinolyl)dimethoxysilane

[0164] Catepe: 1-ethoxy-2-n-pentyloxybenzene

[0165] D (or D donor): Dicyclopentyldimethoxysilane

[0166] DAB-5: 1-ethoxy-2-(6-(2-ethoxyphenoxy)hexyloxy)benzene

[0167] DiBDES: Diisobutyldiethoxysilane

[0168] DiPDMS-Diisopropyldimethoxysilane

[0169] DMDMS-Dimethyldimethoxysilane

[0170] DnBDMS: Di-n-butyl-dimethoxysi...

Embodiment 2

[0202] (1) Procatalyst: using commercial SHAC TM 320 catalyst (2.59% Ti) and DiBP. A catalyst slurry was prepared in toluene at 0.247 mg / ml in toluene. All SCAS and ALA at Isopar E TM Diluted to 0.005M in PPR, except that S-191 was dissolved in toluene before injection into the PPR. In IsoparE TM TEA1 was prepared in and used as a 0.02 or 0.1 M solution.

[0203] (2) Polymerization: The purged parallel polymerization reactor (PPR) was heated to 50°C, and TEA1 and Isopar E TM Make-up solvent was added to each reactor, followed by the addition of hydrogen to a steady pressure of 5 psig. The reactor was heated to the indicated temperature (67, 100 or 115°C). Propylene was added to 100 psig and allowed to stabilize for 10 minutes. Add SCA or a mixture of SCA1, SCA2 and ALA and 500 μl of Isopar E to each reactor TM Diluent (chaser), followed by immediate addition of catalyst (275 μl) and 500 μl Isopar E TM Diluent. After 60 minutes or when a maximum relative conversion o...

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Abstract

The present disclosure provides a Ziegler-Natta catalyst composition comprising a procatalyst, a cocatalyst and a mixed external electron donor comprising a first selectivity control agent, a second selectivity control agent and an activity limiting agent. A polymerization process incorporating the present catalyst composition produces a high-stiffness propylene-based polymer with a melt flow rate greater than about 50 g / 10 min. The polymerization process occurs in a single reactor, utilizing standard hydrogen concentration with no visbreaking.

Description

[0001] claim priority [0002] This application is a continuation-in-part of International Patent Application No. PCT / US2008 / 073882, filed August 21, 2008, which claims U.S. Provisional Application No. 60 / 957888, filed August 24, 2007 priority, the entire content of each application is hereby incorporated by reference. Background technique [0003] As the demand for more complex polymers continues to grow, the demand for high stiffness propylene-based polymers with high melt flow continues to increase. Polymeric catalyst compositions with mixtures of selectivity control agents (SCAs) are known. Mixed SCAs enable the production of olefin-based polymers with properties contributed by each SCA. However, the highly exothermic nature of olefin polymerization reactions was not altered using catalyst compositions with mixed SCAs. The excess heat generated during polymerization poses a great risk to the operability of the polymerization reactor. Excessive heat generation and / or in...

Claims

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Application Information

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IPC IPC(8): C08F10/06C08F4/646C08F4/649B01J31/02B01J31/22C08F4/651
CPCB01J8/1809C08F110/06B01J31/143C08F210/06B01J31/2226B01J31/0201B01J31/128B01J31/2213B01J31/0212C08F10/06B01J8/1872B01J31/0272C08F10/02C08F2400/02C08F2/40C08F2/34C08F2/00C08F4/6465C08F4/6494C08F4/651C08F2500/12C08F2500/18C08F2500/24C08F210/16B01J31/02C08F4/646C08F4/656
Inventor 陈林枫
Owner WR GRACE & CO CONN
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