Ether-Substituted Bisphosphite Ligands for Higher Hydroformylation Yield
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Solution Overview
Problem
Existing hydroformylation processes face challenges in achieving high yields of aldehydes from olefins, particularly with bisphosphite compounds.
Innovation Solution
Development of bisphosphite compounds with specific ether residues, represented by formula (I), used in conjunction with rhodium catalysts and carbon monoxide, to enhance the hydroformylation process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional bisphosphite compounds are used in hydroformylation, then the process is simple, but the yield of aldehydes is limited to around 39%
Solution Approach 1:
The patent modifies the molecular structure of bisphosphite compounds by introducing ether residues at specific positions (R1, R2, R3, R4, R5, R6) with varying chain lengths and configurations. This structural parameter change transforms the ligand properties, enabling significantly higher aldehyde yields (up to 44%) in hydroformylation reactions while maintaining the fundamental bisphosphite framework.
Solution Approach 2:
The invention creates composite ligand structures by combining phosphite groups with ether residues in a single molecule. The bisphosphite compound integrates multiple functional moieties (phosphorus-containing groups and oxygen-containing ether chains) that work synergistically to enhance catalytic performance in hydroformylation, achieving superior yield compared to conventional single-function ligands.
2Reliability
If complex bisphosphite structures with multiple ether residues are synthesized, then catalytic activity improves, but the manufacturing process becomes more complex
Solution Approach 1:
The synthesis is divided into distinct sequential stages: first forming organochlorophosphites from phosphorus trichloride and phenolic compounds, then reacting these intermediates with additional phosphorus trichloride to generate the final bisphosphite product. This segmentation allows each reaction step to be optimized independently and simplifies the overall manufacturing process despite the molecular complexity.
Solution Approach 2:
The patent employs triethylamine as an intermediary base in the synthesis process, which facilitates the reaction between phosphorus trichloride and phenolic compounds by neutralizing HCl byproduct. The use of standard intermediaries like triethylamine and common solvents (toluene, dichloromethane) simplifies manufacturing by utilizing well-characterized reagents with predictable behavior.
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 proposed compounds significantly improve the yield of aldehydes in hydroformylation reactions, achieving yields up to 44% compared to 39% with conventional bisphosphite compounds.
Implementation Method 1
the substance comprising Rh is selected from: Rh(acac)(CO) 2, Rh(acac)(cod) (Umicore, acac = acetylacetonate anion; cod = 1,5-cyclooctadiene), Rh 4 CO 12
Data Source
AI summary
Bisphosphites with an ether residue on the wing component.