Polycyclic Dialdehyde Hydroformylation in a Single-Phase Catalyst System
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Solution Overview
Problem
Existing hydroformylation processes for converting polycyclic aliphatic diolefins to dialdehydes face inefficiencies in catalyst conversion and selectivity, particularly with catalysts degrading quickly and requiring high catalyst concentrations.
Innovation Solution
A process using a water-soluble diphosphine or triarylphosphine complex catalyst system in a homogeneous liquid phase with controlled mass ratios of components to maintain a single-phase solution, allowing efficient conversion of polycyclic aliphatic diolefins to dialdehydes at moderate pressures and temperatures, enhancing catalyst stability and selectivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional hydroformylation processes use high catalyst concentrations to maintain activity, then conversion efficiency is improved, but catalyst cost and equipment investment increase
Solution Approach 1:
The patent changes the physical state parameter of the reaction system from heterogeneous to homogeneous by using water-soluble phosphine ligands and conducting the reaction in an aqueous medium. This parameter change allows the catalyst to remain uniformly dispersed and active at very low concentrations (0.001-0.1 mol%), dramatically improving catalytic efficiency while reducing the quantity of catalyst required.
Solution Approach 2:
The patent creates a composite catalytic system by combining transition metal carbonyl halides with water-soluble phosphine ligands (such as TPPTS). This composite catalyst system exhibits enhanced stability and activity, allowing effective catalysis at extremely low concentrations while maintaining high conversion efficiency throughout the reaction.
2Stability of the object's composition
If conventional processes use organic solvents to dissolve reactants, then reaction homogeneity is improved, but environmental harm and safety risks increase
Solution Approach 1:
The patent fundamentally changes the solvent parameter from organic to aqueous medium. By using water as the reaction medium and employing water-soluble phosphine ligands, the system achieves homogeneous reaction conditions without the harmful effects of organic solvents, eliminating flammability risks and environmental pollution while maintaining reaction homogeneity.
Solution Approach 2:
The patent converts the traditionally harmful role of organic solvents into a beneficial aqueous system. Water, which is inherently safe and environmentally friendly, is transformed into an effective reaction medium through the use of water-soluble catalyst components, turning a potential limitation into an advantage for both safety and sustainability.
3Manufacturing precision
If catalysts are used at high concentrations to maintain selectivity, then product selectivity is improved, but catalyst degradation accelerates
Solution Approach 1:
The patent changes the chemical environment parameter to an aqueous medium with water-soluble phosphine ligands. This creates a more stable chemical environment for the catalyst, preventing degradation while maintaining high selectivity. The water-soluble ligands form stable complexes with the metal center, protecting it from decomposition even at very low catalyst concentrations.
Solution Approach 2:
The water-soluble phosphine ligands act as intermediaries between the metal catalyst and the aqueous environment. These ligands stabilize the metal center, prevent catalyst aggregation and degradation, while still allowing efficient substrate binding and product formation, thereby extending catalyst life without compromising selectivity.
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 process achieves high conversions and selectivities with low catalyst concentrations, extending catalyst life and reducing equipment investment, while maintaining a single-phase reaction environment.
Implementation Method 1
hydroformylation of polycyclic aliphatic diolefins in the presence of synthesis gas over an organophosphorus ligand modified metal catalyst system having a transition metal of the 8th-10th subgroup
Implementation Method 2
The further functionalization of these compounds by conversion of one or more double bonds to other functional groups is also known and described in the literature. For example, the double bonds can be converted to aldehydes by catalytic addition of carbon monoxide and hydrogen in the course of hydroformylation.
Implementation Method 3
in a homogeneous liquid reaction phase the homogeneous liquid phase comprising at least one non-aqueous solvent, diolefin and/or mono- and/or dialdehydes thereof as reaction products and an aqueous catalyst solution, the proportions of these components in the solution being controlled so as to obtain a single-phase solution under the reaction conditions
Data Source
AI summary
The present invention relates to a process for the preparation of polycyclic aliphatic dialdehydes by hydroformylation of polycyclic aliphatic diolefins in the presence of synthesis gas over an organophosphorus ligand modified metal catalyst system having a transition metal of the 8th-10th subgroup, wherein the hydroformylation is carried out by means of a water-soluble diphosphine or triarylphosphine complex catalyst at a pressure of greater than or equal to 0.5 MPa and less than or equal to 10 MPa and at a temperature of greater than or equal to 70° C. and less than or equal to 150°° C. in a homogeneous liquid reaction phase, the homogeneous liquid phase comprising at least one non-aqueous solvent, diolefin and/or mono- and/or dialdehydes thereof as reaction products and an aqueous catalyst solution, the proportions of these components in the solution being controlled so as to obtain a single-phase solution under the reaction conditions.