Heterogenized Catalyst on Porous Ceramic for Hydroformylation
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Solution Overview
Problem
Current hydroformylation processes using homogeneous catalysts face issues with high costs, energy expenditure, catalyst stability, and product purification, as well as decreased catalyst activity over time due to deactivation and pore flooding in heterogenized systems like SILP, which affects conversion efficiency.
Innovation Solution
A hydroformylation process using a heterogenized catalyst system on a porous ceramic monolith support with a transition metal from group 8 or 9, organic phosphorus-containing ligands, and a stabilizer, optionally with an ionic liquid, where the catalyst is immobilized via a thin film on the support, allowing for improved catalyst stability and activity through controlled regeneration and reimpregnation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If homogeneous catalyst systems (rhodium or cobalt with phosphorus ligands) are used for hydroformylation, then catalytic activity and conversion are achieved, but costs increase and catalyst stability decreases due to ligand degradation and solvent consumption
Solution Approach 1:
The patent applies porous ceramic materials as support structures for the catalyst system. The porous structure provides high surface area for catalyst dispersion while maintaining mechanical stability and facilitating mass transfer. The ceramic support prevents catalyst leaching and maintains structural integrity under reaction conditions, thereby improving catalyst stability without sacrificing conversion rate.
Solution Approach 2:
The patent creates a composite catalyst system by combining transition metal catalysts with phosphorus-containing ligands on porous ceramic supports. This composite structure integrates the high catalytic activity of homogeneous catalysts with the stability and mechanical strength of solid ceramic materials, resolving the contradiction between productivity and reliability.
2Reliability
If heterogeneous catalyst systems with ionic liquids (SILP systems) are used to improve stability, then catalyst immobilization is achieved, but catalyst activity decreases over time due to pore flooding and condensation
Solution Approach 1:
The patent modifies the physical and chemical parameters of the catalyst system by using porous ceramic supports with controlled pore size distribution and surface area. The ceramic support properties are optimized to prevent pore flooding while maintaining adequate active sites for catalysis. The stabilizer compound parameters are also adjusted to prevent condensation and maintain catalyst activity over time.
Solution Approach 2:
The patent introduces a stabilizer compound as an intermediary substance between the catalyst and the reaction environment. This stabilizer prevents direct contact between the catalyst and deactivating factors such as water and products, thereby maintaining catalyst activity while preventing pore flooding and condensation that would otherwise reduce conversion rate.
3Loss of substance
If catalyst recycling steps are implemented to avoid losses, then catalyst recovery is improved, but process complexity and energy expenditure increase
Solution Approach 1:
The patent designs the catalyst system to be self-contained on the porous ceramic support, eliminating the need for external recycling systems. The heterogeneous formulation allows the catalyst to remain fixed in the reaction vessel, performing its function continuously without requiring removal, separation, or recycling operations, thereby reducing process complexity while preventing catalyst loss.
4Manufacturing precision
If product purification steps are added to remove catalyst residues, then product purity is improved, but process complexity and energy consumption increase
Solution Approach 1:
The patent converts the potential harm of catalyst residues into a benefit by using porous ceramic supports that inherently prevent catalyst leaching. The ceramic support structure ensures that no catalyst particles are carried over into the product stream, eliminating the need for complex purification steps while maintaining high product purity.
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
This approach enhances catalyst conversion and lifetime by maintaining catalyst activity and preventing deactivation, achieving higher conversion rates and product selectivity compared to traditional SILP systems.
Implementation Method 1
the catalyst is heterogenized, especially by immobilization on a support material... the catalyst is immobilized by formation of a thin liquid film with the aid of an ionic liquid on the surface and/or in the pores of a solid support material
Implementation Method 2
reacting alkenes (olefins) with a mixture of carbon monoxide and hydrogen (also: synthesis gas or syngas) using a catalyst to give aldehydes
Data Source
AI summary
The invention relates to a process for hydroformylating short-chain olefins, especially C2 to C5 olefins, in which the catalyst system is in heterogenized form on a support of a porous ceramic material, and to plants for performing this process.