Solid Catalyst Component for Olefin Polymerization Pore Structure Control
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Solution Overview
Problem
Existing olefin polymerization methods face challenges with fine powder content and surface stickiness in polymer particles, leading to piping blockages and reduced handling and flowability, due to the adhesion of polymer particles and the generation of broad particle size distributions during continuous polymerization.
Innovation Solution
A solid catalyst component for olefin polymerization with a controlled cross-sectional pore area ratio of 10 to 50% and a specific pore distribution, produced using a method that involves contacting magnesium, titanium halogen compounds, and internal electron-donating compounds under controlled conditions, which reduces the generation of fine powder and surface stickiness during polymerization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a highly active solid catalyst component is used for continuous olefin polymerization, then polymerization productivity is improved, but fine powder generation and particle size distribution broadening occur
Solution Approach 1:
The invention changes the physical and chemical parameters of the solid catalyst component by controlling the pore structure (pore volume 0.2-0.6 mL/g, pore diameter 0.5-2.0 μm) and chemical composition (specific ratios of Mg, Ti, halogen, and electron-donating compounds). These parameter changes enable the catalyst to maintain high activity while producing uniform polymer particles with narrow size distribution, resolving the contradiction between productivity and manufacturing precision.
Solution Approach 2:
The solid catalyst component is designed as a composite material containing multiple elements (magnesium, titanium, halogen, and internal electron-donating compounds) in specific ratios. This composite structure provides both high catalytic activity and controlled polymer particle morphology, allowing simultaneous achievement of high productivity and uniform particle size distribution.
2Productivity
If continuous polymerization operation is carried out to improve productivity, then production efficiency is improved, but polymer particle adhesion and piping blockage occur
Solution Approach 1:
The invention modifies the polymer particle properties by controlling the catalyst's pore structure and composition, which affects the polymer surface characteristics. The resulting particles have reduced adhesion and stickiness, preventing piping blockage during continuous operation while maintaining high production efficiency.
3Productivity
If fine powdery polymer particles are generated during polymerization, then catalyst activity is improved, but handling and flowability of polymer particles deteriorate
Solution Approach 1:
The invention optimizes the catalyst parameters (pore volume, pore diameter, chemical composition) to control polymer particle formation. This produces particles with uniform size and reduced fine powder content, maintaining high catalyst activity while significantly improving handling and flowability characteristics.
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 solution effectively produces polymer particles with reduced fine powder content and surface stickiness, improving handling and flowability by minimizing adhesion and heat accumulation, thus preventing piping blockages and enhancing the efficiency of the polymerization process.
Implementation Method 1
a solid catalyst component for olefin polymerization containing magnesium, titanium, halogen and an internal electron-donating compound
Data Source
AI summary
Provided is a solid catalyst component for olefin polymerization capable of suitably producing polymer particles with a suppressed content ratio of fine powder and reduced surface stickiness at high activity when subjected to polymerization of an olefin. The solid catalyst component for olefin polymerization contains magnesium, titanium, halogen and an internal electron-donating compound, in which a cross-sectional pore area ratio is 10 to 50%, and a ratio MXi/MXs of a cross-sectional pore area ratio (MXi) in a region of less than 50% in a radial direction to a cross-sectional pore area ratio (MXs) in a region of 50% or more in the radial direction from a particle center is 0.50 to 2.00.