Zirconium Metal Complexes Eliminate Ligand Purification
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Solution Overview
Problem
Current metal complexes used for polymer formation require ligand purification steps, which increase manufacturing costs, time, and waste production, and have limited polymerization activity.
Innovation Solution
Development of metal complexes of Formula I, II, and III, formed by reacting aryl-heteroaryl compounds with metal dihalide precursors and polar or protic materials, eliminating the need for ligand purification and enhancing polymerization activity, including the use of supported metal complexes with activators and various reaction conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If ligand purification steps are used in metal complex synthesis, then product purity is improved, but manufacturing cost and time increase
Solution Approach 1:
The invention extracts and eliminates the ligand purification step from the synthesis process by designing ligands with inherent properties that prevent impurity formation. The ligands are designed to be naturally pure through selective synthesis pathways, removing the need for separate purification operations while maintaining product purity.
Solution Approach 2:
The invention performs preliminary action by designing and synthesizing ligands with built-in purity characteristics before the metal complex formation. The ligand structure is pre-engineered to avoid impurity generation during synthesis, so no subsequent purification is needed, thus saving time while ensuring purity.
2Manufacturing precision
If ligand purification steps are used in metal complex synthesis, then product purity is improved, but manufacturing cost increases
Solution Approach 1:
The invention removes the ligand purification step entirely by designing ligands that synthesize directly to high purity without requiring additional purification operations. This eliminates the cost of purification solvents, equipment operation, and labor while maintaining product purity through molecular design.
Solution Approach 2:
The invention uses inexpensive, readily available starting materials for ligand synthesis that naturally produce pure products. By selecting cheap, high-purity reagents and straightforward synthesis pathways, the overall manufacturing cost is reduced while avoiding expensive purification steps.
3Productivity
If traditional metal complexes are used, then polymerization can be performed, but polymerization activity is limited
Solution Approach 1:
The invention changes key parameters of the metal complex structure, including the metal center oxidation state, ligand denticity, and steric environment. These parameter changes optimize the catalyst's electronic and steric properties, dramatically increasing polymerization activity and catalyst efficiency while reducing waste.
Solution Approach 2:
The invention creates composite metal complex catalysts by combining specific metal centers with specially designed multidentate ligands. This composite structure synergistically enhances the catalytic activity, allowing higher polymerization rates and better catalyst efficiency compared to simple metal salts or traditional catalysts.
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 new metal complexes demonstrate high polymerization activity, reducing manufacturing costs and time, and eliminating waste, with supported metal complexes achieving up to 1400 grams of polymer per gram of catalyst, while simplifying the synthesis process.
Implementation Method 1
The present disclosure provides methods for forming a polymer including contacting an olefin with a metal complex of Formula I
Implementation Method 2
the metal complex of Formula II is formed by reacting a metal complex of Formula I with a polar organic material selected from the group of ketones, aldehydes, imines, and combinations thereof
Data Source
AI summary
Embodiments of the present disclosure are directed towards metal complexes that can be utilized to form polymers. As an example, the present disclosure provides a metal complex of Formula (I) wherein M is Zr, Hf, or Ti; each Het is independently a heterocyclic; each L is independently a bridging group; each X is independently Cl, Br, I, or alkyl; each R1 is independently selected from the group including hydrogen, alkyls, alkenyls, alkynyls, cycloalkyls, aryls, acyls, aroyls, alkoxys, aryloxys, alkylthiols, dialkylamines, alkylamidos, alkoxycarbonyls, aryloxycarbonyls, carbomoyls, alkyl- and dialkyl-carbamoyls, acyloxys, acylaminos, aroylaminos, aromatic rings, fused aromatic rings, and combinations thereof; and each n is independently an integer having a value of one to five.