Iridium-Phosphine Catalyst for Low-Cost Propylene Hydroformylation
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Solution Overview
Problem
Rhodium-based catalysts for hydroformylation are expensive and have complex synthetic routes, leading to high production costs, while existing alternatives to rhodium-based catalysts face similar issues with high synthesis costs and stability concerns.
Innovation Solution
Development of an iridium-based catalyst using tripyridyl phosphine as a ligand, with a specific structural formula, and a preparation method involving controlled vacuum evaporation to maintain catalyst activity and stability, allowing for low-cost, efficient propylene hydroformylation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If rhodium-based catalysts are used for hydroformylation, then catalytic activity is high, but production cost is extremely expensive
Solution Approach 1:
The patent replaces expensive rhodium-based catalysts with cheaper iridium-based catalysts. The iridium catalyst system achieves comparable catalytic activity for hydroformylation reactions while dramatically reducing production costs, as iridium is significantly less expensive than rhodium. This substitution directly addresses the contradiction by using a cheaper alternative material that maintains the required performance level.
Solution Approach 2:
The patent modifies the catalyst system by changing the metal center from rhodium to iridium and optimizing the ligand environment with phosphine ligands. These parameter changes in the catalyst composition enable the iridium-based system to achieve high catalytic activity comparable to rhodium-based catalysts, while the inherent lower cost of iridium metal resolves the production cost issue.
2Reliability
If complex ligands are used to optimize rhodium-based catalysts, then catalytic performance is improved, but synthesis cost increases
Solution Approach 1:
The patent adopts phosphine ligands for the iridium-based catalyst system, which are relatively simple and inexpensive to synthesize compared to the complex ligands used in rhodium catalyst optimization. The iridium-phosphine catalyst system achieves high catalytic performance without requiring elaborate ligand structures, thus reducing synthesis costs while maintaining effectiveness.
3Quantity of substance
If traditional hydroformylation processes are used, then aldehyde production is achieved, but energy consumption is high
Solution Approach 1:
The patent employs an iridium-based catalyst system that enables hydroformylation reactions to proceed under milder conditions with higher efficiency. The improved catalytic activity and selectivity of the iridium-phosphine system enhance reaction rates and reduce the need for extreme temperatures and pressures, thereby lowering energy consumption while maintaining high aldehyde production efficiency.
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 iridium-based catalyst achieves comparable catalytic performance to rhodium-based catalysts at a fraction of the cost, with improved reaction efficiency and reduced energy consumption, enabling cost-effective industrial production of aldehydes.
Implementation Method 1
an iridium-based catalyst and preparation method therefor, and method for catalyzing propylene hydroformylation
Implementation Method 2
vacuum evaporating the tetrahydrofuran solution at 25-30° C. to obtain a target product
Data Source
AI summary
Provided in the present invention are an iridium-based catalyst and a preparation method therefor, and a method for catalyzing propylene hydroformylation. The structural formula of the iridium-based catalyst is (I), wherein Ph is phenyl, x is any one of 0, 1 and 2, and X is any one of Cl, NO3, BF4, PF6 and acac. The iridium-based catalyst disclosed in the present invention has a good catalytic effect and high activity and can still maintain a relatively high catalytic performance after repeated use.