Olefin Polymerization Catalyst Component Manufacturing
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Solution Overview
Problem
The existing solid catalyst components for olefin polymerization face challenges in controlling polymer properties due to the preferential inclusion of weakly soluble electron donor compounds and decreased stereospecificity caused by monofunctional electron donors, leading to suboptimal polymerization activity and stereoregularity.
Innovation Solution
A method involving preliminary contact between a magnesium compound and a specific compound represented by general formula (I), followed by interaction with a titanium halide compound and internal electron donor compounds, to control adsorption and enhance stereospecificity and polymerization activity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If two types of internal electron donor compounds (weakly soluble and strongly soluble) are simultaneously used in the solid catalyst component, then the catalyst structure is more complex, but the weakly soluble compound is preferentially contained and the strongly soluble compound cannot exert its polymer properties, making polymer property control difficult
Solution Approach 1:
The patent applies preliminary action by pre-contacting the magnesium compound with the internal electron donor compound before introducing the titanium halide compound. This sequential approach ensures that the electron donor compound is already associated with the magnesium carrier when the catalyst forms, preventing preferential inclusion of weakly soluble compounds and enabling precise control over which electron donor compounds are present in the final catalyst structure
Solution Approach 2:
The patent segments the catalyst manufacturing process into distinct stages: first contacting magnesium compound with internal electron donor compound, then adding titanium halide compound. This segmentation allows independent control of each component's incorporation, preventing the mixing problems that occur when multiple electron donor compounds are introduced simultaneously
2Ease of manufacture
If monofunctional electron donor compound is used in the solid catalyst component, then the catalyst can be manufactured, but the stereospecificity of the solid catalyst component decreases, leading to decreased stereoregularity of the polymer obtained
Solution Approach 1:
The patent changes the functional parameter of the electron donor compound from monofunctional to multifunctional (specifically difunctional compounds with two electron-donating groups). This parameter change increases the stereospecificity of the catalyst while maintaining ease of manufacture, as the multifunctional compounds provide stronger and more directional electron donation to the titanium center, enhancing stereoregularity
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
This approach results in a solid catalyst component with improved polymerization activity and stereospecificity, allowing for the production of polymers with high yield and stereoregularity, while effectively managing the content of internal electron donor compounds.
Implementation Method 1
bringing a magnesium compound and a compound represented by general formula (I) below into contact with each other to obtain a preliminary contact product
Data Source
AI summary
A method for manufacturing a solid catalyst component for polymerization of an olefin is disclosed, which includes bringing a magnesium compound and a specific styrene-based compound into contact with each other to obtain a preliminary contact product, and subsequently bringing the preliminary contact product, a titanium halide compound, and an internal electron donor compound into contact with each other to obtain a solid catalyst component for polymerization of an olefin; and a method for manufacturing a catalyst for polymerization of an olefin and a method for manufacturing a polymer of an olefin using the solid catalyst component for polymerization of an olefin obtained by the manufacturing method.