Solid Titanium Catalyst Component for Olefin Polymerization
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Solution Overview
Problem
The existing olefin polymerization catalysts face challenges in achieving a low production cost and avoiding the use of polyfunctional aromatic compounds, while also struggling to produce catalysts with large particle diameters using complex and costly processes.
Innovation Solution
A solid titanium catalyst component is developed by contacting a magnesium compound with an ester compound and a liquid titanium compound in a specific order, resulting in a catalyst with a particle diameter of over 30 μm, free from polyfunctional aromatic compounds and produced through a relatively simple process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional methods using phthalic acid ester are used, then polymerization activity and stereospecificity are improved, but safety and hygiene problems arise due to the use of polyfunctional aromatic compounds
Solution Approach 1:
The patent replaces the hazardous phthalic acid ester with a biodegradable small molecule compound that performs the same electron donor function but degrades safely, eliminating the safety and hygiene problems while maintaining catalytic performance
Solution Approach 2:
The patent changes the chemical structure parameter from aromatic ester to aliphatic ester with specific molecular weight range (100-500 g/mol), transforming the harmful aromatic compound into a safe biodegradable compound while preserving the electron donor functionality
2Length of stationary object
If methods using large diameter carriers are used to produce large particle diameter catalysts, then particle diameter is improved, but production process complexity and cost increase
Solution Approach 1:
The patent performs preliminary action by adding the electron donor to the magnesium compound before titanium compound addition, pre-forming a matrix structure that naturally supports large particle diameter catalyst formation without requiring complex carrier systems
Solution Approach 2:
The patent enables the catalyst system to self-organize into large particles through the sequential addition process, where the electron donor-modified magnesium compound automatically forms the structural framework that supports large particle formation without external carriers
3Ease of manufacture
If simple production processes are used, then production cost is reduced, but catalyst particle diameter remains small
Solution Approach 1:
The patent applies preliminary action by pre-modifying the magnesium compound with electron donor before titanium addition, creating a structure that inherently promotes large particle formation during the simple mixing process, achieving both simplicity and large particle diameter
Solution Approach 2:
The patent changes the physical state parameter of the magnesium compound from solid to liquid form during the reaction, enabling simple mixing processes to produce large particles through controlled solidification and aggregation during catalyst formation
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 stabilizes the gas phase polymerization process and allows for the easy production of various olefin polymers, conforming to safety and hygiene regulations by eliminating polyfunctional aromatic compounds and reducing production costs.
Implementation Method 1
allowing a magnesium compound (A) having no reducing ability in a liquid state to contact with an ester compound (B) having a specific structure and a liquid titanium compound (C) in a specific order has a larger particle diameter of over 30 μm
Data Source
AI summary
The present invention provides an olefin polymerization catalyst, which is free of polyfunctional aromatic compounds and has a large particle diameter, and a solid titanium component (I) which forms the catalyst. The olefin polymerization catalyst comprises a solid titanium component (I), an organometallic compound (II) and optionally an electron donor (III) wherein the solid titanium component (I) comprising titanium, magnesium and halogen is obtainable by allowing a magnesium compound (A) having no reducing ability in a liquid state to contact with an ester compound (B) represented by the following formula (1) and a liquid titanium compound (C) in a specific order,wherein R2 and R3 are COOR1 or R, and at least one of R2 and R3 is COOR1, two or more R1 each are a monovalent hydrocarbon group having 1 to 20 carbon atoms, and two or more R are a hydrogen atom, or a hydrocarbon group having 1 to 20 carbon atoms, and at least two of Rs may be bonded each other to form a ring, and the skeleton of the ring formed may include a double bond or a hetero atom.