Carboxyl Polymer Catalyst Support for Rhodium Retention
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Solution Overview
Problem
Existing supported metal catalysts face issues with poor chemical properties leading to catalyst loss, high production costs, and low catalytic activity due to mechanical instability, particularly when using expensive heavy metals like rhodium.
Innovation Solution
A polymer containing a carboxyl group is developed by polymerizing specific monomers, which improves the mechanical properties and stability of the catalyst, allowing for better metal support and retention, and enhancing catalytic activity through coordination reactions with heavy metals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional polymers with phosphorus ligands or amino ligands are used as catalyst carriers, then the catalyst can be supported on the carrier, but the chemical properties are poor resulting in easy catalyst loss and high loss rate of expensive heavy metals
Solution Approach 1:
The invention changes the chemical composition parameters of the polymer carrier by incorporating carboxyl groups with specific content (0.1-1.0 mmol/g) along with phosphorus ligands and amino ligands. This parameter modification enhances the chemical properties and stability of the catalyst carrier, reducing metal loss while maintaining catalytic activity.
Solution Approach 2:
The invention creates a composite polymer carrier combining multiple functional groups (carboxyl, phosphorus ligand, amino ligand) within a single polymer structure. This composite approach synergistically improves the chemical properties, metal binding capability, and overall stability of the catalyst support system.
2Productivity
If traditional polymer carriers are used, then the catalyst can be prepared, but the yield of catalyst preparation is low
Solution Approach 1:
The invention optimizes polymerization parameters including monomer ratios, carboxyl group content, and cross-linking degree to achieve both high catalyst preparation yield and high catalyst stability. The specific carboxyl group content range (0.1-1.0 mmol/g) is determined to balance these two requirements.
3Reliability
If traditional polymer carriers with phosphorus ligands and amino ligands are used, then the catalyst can be formed, but the catalytic activity is generally low
Solution Approach 1:
The invention develops a composite polymer carrier integrating carboxyl groups, phosphorus ligands, and amino ligands. This composite structure provides multiple coordination sites for metal catalysts, enhancing both the stability and catalytic activity through synergistic effects of different functional groups.
Solution Approach 2:
The invention creates localized active sites on the polymer carrier by distributing different functional groups (carboxyl, phosphorus, amino) at specific locations and concentrations. This local optimization of functional group arrangement enhances metal binding and catalytic activity while maintaining overall carrier stability.
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 polymer-based catalyst exhibits improved mechanical properties and catalytic activity, reducing metal loss and production costs, while maintaining high reaction yields and enabling efficient recycling.
Implementation Method 1
The polymer is used as a carrier to support the heavy metal catalyst by coordination of the heavy metal catalyst and the ligand on the carrier
Implementation Method 2
the polymer is prepared by polymerizing the following monomers
Data Source
AI summary
A polymer containing a carboxyl group, a preparation method and an application thereof, a supported catalyst and a preparation method thereof and preparation methods of a penem antibiotic intermediate are disclosed. The polymer is prepared by polymerizing three monomers with different structures. The carboxyl group-containing polymer is a cross-linked polymer, and a polymer chain contains a large number of benzene rings, which can improve the rigidity and hardness of the polymer, thus effectively improving the mechanical properties of the polymer. Meanwhile, in the polymer, the carboxyl group is used as a main functional group, and is used as a carrier to prepare, by means of a coordination reaction between the carboxyl group and a heavy metal, a supported metal catalyst which has better connection stability between the metal and the polymer. The above two factors can improve the stability of the supported metal catalyst, such that the catalyst can be recycled without losing the catalytic activity. Meanwhile, loss of a heavy metal active ingredient and production cost can be reduced.