Olefin Polymerization Catalyst Internal Electron Donor
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Solution Overview
Problem
Current Ziegler-Natta catalyst systems for olefin polymerization have low activity and result in high catalytic residues, with a need for improved internal electron donor compounds to enhance activity and crystalline isotactic fractions in olefinic polymers.
Innovation Solution
A catalyst system comprising an internal electron donor compound with specific structural features, combined with titanium and magnesium compounds, and optionally an organoaluminum and organosilicon compound, is used for olefin polymerization to enhance activity and produce polymers with increased crystalline isotactic fractions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional Ziegler-Natta catalyst systems are used for olefin polymerization, then the polymerization can proceed, but the catalyst activity is low resulting in high catalytic residues in the polymers
Solution Approach 1:
The patent applies parameter changes by modifying the chemical structure of internal electron donor compounds. Specifically, it introduces compounds with formula (I) containing specific functional groups (ether, ketone, or ester) with defined molecular weight ranges (150-500 g/mol) and structural parameters (R1-R8 groups). These parameter modifications to the electron donor compound structure directly increase catalyst activity while reducing catalytic residues in the resulting polymers.
2Manufacturing precision
If conventional Ziegler-Natta catalysts are used, then olefin polymerization occurs, but the content of crystalline isotactic fractions in the olefinic polymers is insufficient
Solution Approach 1:
The patent employs parameter changes by optimizing the molecular weight (150-500 g/mol) and structural composition of internal electron donor compounds. The specific parameters including the nature of R1-R8 groups and the presence of ether, ketone, or ester functional groups are tuned to achieve both high catalyst activity and increased crystalline isotactic fractions in the resulting olefinic polymers, resolving the contradiction between productivity and manufacturing precision.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The catalyst system achieves higher activity and increased crystalline isotactic fractions in olefinic polymers, improving the efficiency and quality of polymerization processes.
Implementation Method 1
an olefin polymerization catalyst component comprising an internal electron donor compound... for use in olefin polymerization
Data Source
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AI summary
An olefin polymerization catalyst component is includes an internal electron donor compound of formula (I). A catalyst system for polymerization of an olefin includes the olefin polymerization catalyst component of formula (I) further including a titanium halide and/or a magnesium halide; an organoaluminum compound; and optionally an external electron donor. A process for polymerizing or copolymerizing an olefin includes providing the above catalyst system polymerizing or copolymerizing the olefin in a presence of the catalyst system to form a polymer or a copolymer; and recovering the polymer or the copolymer.