Polyketone Polymerization Catalyst Ligand Design
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Solution Overview
Problem
Current polyketone polymerization catalysts are difficult to commercially synthesize in large quantities due to complex structures and high molecular weights, leading to high production costs and safety concerns in mass production.
Innovation Solution
A polyketone polymerization catalyst system using ((2,2-dimethyl-1,3-dioxane-5,5-diyl)bis(methylene))bis(bis(2-methoxyphenyl)phosphine) as a ligand, combined with a transition metal ion and an acid, allowing for a simpler structure and lower molecular weight while maintaining high activity, and a method for synthesizing this ligand in large quantities without hazardous lithium use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional bisphosphine ligands (e.g., BDOMPP, spiro compounds) are used to achieve high polymerization activity, then polymerization activity is improved, but manufacturing cost increases and commercial synthesis becomes difficult
Solution Approach 1:
The patent modifies the ligand structure by changing molecular weight and structural parameters. The new ligand has a lower molecular weight (476.54 g/mol) compared to conventional ligands (532.54-672.73 g/mol), and uses a simplified dioxane backbone instead of complex spiro structures, making it easier to manufacture commercially while maintaining high polymerization activity
Solution Approach 2:
The patent employs a ligand that can be synthesized more cheaply and readily than conventional ligands. The simplified structure using commercially available starting materials (2-methoxyphenylphosphine and 5,5-dimethyl-1,3-dioxane) allows for cost-effective large-scale production, replacing expensive and difficult-to-synthesize ligands
2Productivity
If complex ligand structures (e.g., spiro compounds, dimethoxy compounds) are used to improve polymerization activity, then polymerization activity is improved, but production cost increases
Solution Approach 1:
The patent simplifies the ligand structure by segmenting it into a basic dioxane core with phosphine substituents, eliminating the need for complex spiro or dimethoxy structures. This segmented approach maintains the essential functional groups needed for high activity while removing unnecessary structural complexity
Solution Approach 2:
The patent extracts only the essential functional elements needed for high polymerization activity from the complex conventional ligands. By taking out the core phosphine-dioxane functionality and removing complex spiro or dimethoxy moieties, the ligand achieves high activity with simpler structure
3Productivity
If conventional ligands with high molecular weight are used to achieve high activity, then polymerization activity is improved, but production cost and synthesis difficulty increase
Solution Approach 1:
The patent changes the molecular weight parameter of the ligand by using a lighter dioxane-based structure (476.54 g/mol) instead of heavier conventional ligands (532.54-672.73 g/mol). This parameter change reduces the molecular weight while preserving the essential coordination chemistry needed for high polymerization activity
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 high polymerization activity with reduced production costs and safe commercial-scale synthesis, ensuring efficient and cost-effective production of polyketone polymers.
Implementation Method 1
A polymerization catalyst used in preparing the polyketone is typically composed of the system of Pd(II)/bidentate phosphine ligand/acid
Implementation Method 2
a palladium (II) acetate/1,3-bis[di(2-methoxyphenyl)phosphino]propane/trifluoroacetic acid (Pd(OAc)2-BDOMPP-TFA) system
Data Source
AI summary
Provided are a novel polyketone polymerization catalyst and a method of preparing a ligand, which can reduce production costs and can enable commercial mass synthesis by using ((2,2-dimethyl-1,3-dioxane-5,5-diyl)bis(methylene))bis(bis(2-methoxyphenyl)phosphine) as a ligand constituting the polykeytone polymerization catalyst, the ligand having a simple structure and a small molecular weight while having high activity.