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Amide ester internal electron and process

A technology of internal electron donor and electron donor, which is applied in the field of procatalyst composition, can solve problems such as limitations, and achieve the effect of improving catalyst activity and catalyst selectivity

Active Publication Date: 2013-02-06
WR GRACE & CO CONN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the production of olefin-based polymers with broad MWD via Ziegler-Natta catalysts is generally limited to single-reactor processes requiring tight process control and / or cascaded reactor processes requiring multiple reactors

Method used

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  • Amide ester internal electron and process
  • Amide ester internal electron and process
  • Amide ester internal electron and process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0152] 1. Synthesis of amide ester

[0153] Ethyl 2-cyano-2-isobutyl-4-methylpentanoate, and ethyl 2-cyano-2-isopropyl-3-methylbutanoate:

[0154]

[0155] A 500-ml round bottom flask was equipped with a magnetic stirrer and charged with ethyl 2-cyanoacetate (11.3 g, 0.1 mol) and anhydrous DMF (120 ml). To this stirred solution was added 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) (30.4 g, 0.2 mol, 1.0 equiv) in dry DMF (40 ml) dropwise The solution. After the addition was complete, the mixture was stirred for an additional hour. The flask was cooled in an ice-water bath and a solution of iodide (0.2 mol, 1.0 equiv) in DMF (40 ml) was added dropwise. The mixture was warmed to room temperature and stirred for an additional 14 hours until all starting material was converted to product (monitored by GC). The mixture was poured into ice water, and extracted with diethyl ether. The combined ether extracts were washed with water and brine, dried over magnesium sulfate. After f...

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Abstract

Disclosed is a process for producing a procatalyst composition having an amide ester internal electron donor. The process includes pre-halogenating a procatalyst precursor before reaction with the amide ester and forming the procatalyst composition. Ziegler-Natta catalyst compositions containing the present procatalyst composition exhibit improved catalyst activity and / or improved catalyst selectivity and produce propylene-based olefins with broad molecular weight distribution.

Description

Background technique [0001] The present invention relates to procatalyst compositions having an amide ester internal electron donor, catalyst compositions comprising the same, and polymers prepared from the catalyst compositions. [0002] The worldwide demand for olefin-based polymers continues to grow as the applications for these polymers become more diverse and advanced. Olefin-based polymers with broad molecular weight distribution (MWD) are increasingly used, for example, in thermoforming; pipe-molding, foam-molding, blow molding; and films. Ziegler-Natta catalyst compositions are known for the production of olefin-based polymers, especially propylene-based polymers with a broad MWD. Ziegler-Natta catalyst compositions typically include a procatalyst comprising a transition metal halide (i.e., titanium, chromium, vanadium) supported on a metal or metalloid compound (e.g., magnesium chloride or silica), complexed with a cocatalyst such as an organoaluminum compound pre-c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F10/06C08F4/651C08F4/654
CPCC08F110/06C08F10/06C08F4/651C08F4/654C08F2500/12C08F2500/18C08F2500/04
Inventor X.黄陈林枫C.C.威廉斯T.W.梁陶涛高宽强
Owner WR GRACE & CO CONN
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