In-situ Hydroformylation Catalyst Heterogenization on Ceramic Monoliths
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Solution Overview
Problem
The existing methods for heterogenizing hydroformylation catalysts require transporting and filling the catalyst in an inert environment, which is difficult and costly to maintain, and result in inefficiencies in catalyst utilization.
Innovation Solution
The process involves in-situ production of a hydroformylation catalyst system on a support monolith within the reactor, using a catalyst solution containing a transition metal, organic phosphorus-containing ligand, stabilizer, and optionally an ionic liquid, which is applied directly to the monolith, eliminating the need for external inert environments and allowing for increased conversion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the catalyst system is produced outside the reactor in an inert environment and then transported and filled into the reactor, then the catalyst can be properly prepared and immobilized, but the process becomes costly and complex due to the need to maintain inert conditions during transport and filling
Solution Approach 1:
The patent combines the catalyst preparation step with the reactor operation by performing both processes in the same vessel. The catalyst components are introduced into the reactor containing the support monolith, and the catalyst is formed in-situ under reaction conditions, eliminating the need for separate preparation and transport steps under inert atmosphere.
Solution Approach 2:
The reactor itself serves dual purposes: as the reaction vessel and as the catalyst preparation chamber. The reaction conditions (temperature, pressure, atmosphere) automatically provide the environment needed for catalyst formation, making the system self-sufficient and eliminating external inert environment requirements.
2Reliability
If the catalyst system is produced outside the reactor and transported under inert conditions, then catalyst activity can be maintained, but the process time and costs increase due to transport and filling operations
Solution Approach 1:
The support monolith is pre-prepared with immobilization sites (e.g., silane groups) before reactor operation. When the catalyst components are introduced during reactor operation, they immediately bind to the pre-prepared sites, eliminating the need for time-consuming transport and filling operations while maintaining catalyst activity.
Solution Approach 2:
The catalyst formation process is merged with the reactor startup or operation process. Instead of preparing catalyst separately and then installing it, both processes occur simultaneously in the reactor, significantly reducing the time from reactor preparation to catalytic operation.
3Productivity
If homogeneous catalysis is used for hydroformylation, then high catalyst activity and conversion rates are achieved, but separation and purification problems arise
Solution Approach 1:
The catalyst is localized on the support monolith surface or within its pores, creating a heterogeneous system. This local concentration of catalyst activity maintains high conversion rates while the solid support enables easy separation from the reaction mixture, combining the advantages of both homogeneous and heterogeneous catalysis.
Solution Approach 2:
The patent uses composite material structures where catalyst components are immobilized on a support matrix (e.g., silica monolith with organic modifications). This composite structure provides both the high activity of molecular catalysts and the ease of separation of heterogeneous 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
This approach simplifies the catalyst installation process, reduces costs, and enhances catalyst activity and stability by ensuring the catalyst is applied directly in the reactor, leading to improved conversion rates and operational efficiency.
Implementation Method 1
the catalyst system is heterogenized on a support monolith
Implementation Method 2
evaporating the remaining solvent residues by adjusting the pressure and/or increasing the temperature
Data Source
AI summary
The invention relates to a process for the hydroformylation of short-chain olefins, in particular C2 to C5 olefins, in which in the second hydroformylation step the catalyst system is heterogeneously present on a support monolith made of a porous ceramic material, and to equipment for carrying out this process.