Quaternary Phosphonium Salt Catalyst for Metal-Free Propylene Glycol Phenyl Ether
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Solution Overview
Problem
Propylene glycol phenyl ether synthesized using metal-based catalysts contains metal ions, making it unsuitable for industrial applications where metal ions are restricted, leading to complex processing and increased production costs.
Innovation Solution
Employing a quaternary phosphonium salt compound, such as methyltriphenylphosphonium bromide, ethyltriphenylphosphonium bromide, or propyltriphenylphosphonium bromide, as a catalyst for the polymerization of phenol and propylene oxide under controlled conditions to produce metal-ion-free propylene glycol phenyl ether.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If metal-based catalysts (sodium hydroxide or potassium hydroxide) are used for synthesizing propylene glycol phenyl ether, then the synthesis reaction can proceed efficiently, but the product contains metal ions that cannot be directly applied to industrial fields where metal ions are strictly restricted
Solution Approach 1:
The patent changes the chemical nature of the catalyst from metal-based (sodium hydroxide or potassium hydroxide) to organic-based (quaternary phosphonium salt). This parameter change in catalyst composition eliminates metal ion contamination in the product while maintaining catalytic efficiency for the ring-opening polymerization of phenol and propylene oxide.
2Productivity
If metal-based catalysts are used, then the synthesis reaction proceeds efficiently, but subsequent processing is required to remove metal ions, resulting in complexity in the operation of the entire process as well as increased production cost
Solution Approach 1:
The patent extracts and removes the harmful metal ion component from the catalyst system. By using an organic quaternary phosphonium salt catalyst instead of metal-based catalysts, the source of metal ion contamination is completely eliminated, thereby removing the need for subsequent metal ion removal processes and simplifying the overall production process.
3Productivity
If metal-based catalysts are used, then the synthesis reaction proceeds efficiently, but the production cost of propylene glycol phenyl ether increases due to required metal ion removal processes
Solution Approach 1:
The patent eliminates the need for metal ion removal processes by extracting the harmful metal component from the catalyst system. This removal of the contamination source eliminates associated processing costs, thereby reducing the overall production cost while maintaining synthesis 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
This method eliminates the need for subsequent metal ion removal processes, simplifies the production process, reduces costs, and results in a product with improved quality and environmental friendliness, suitable for direct industrial application.
Implementation Method 1
The present invention uses a quaternary phosphonium salt compound as a catalyst for preparing propylene glycol phenyl ether
Data Source
AI summary
Disclosed is the use of a quaternary phosphonium salt compound as a catalyst for preparing a catalyst for propylene glycol phenyl ether. Also provided is a method for synthesizing propylene glycol phenyl ether by mixing phenol and a quaternary phosphonium salt compound, and then adding propylene oxide under oxygen-free conditions, wherein the phenol is polymerized with the propylene oxide to produce the propylene glycol phenyl ether. The propylene glycol phenyl ether thus prepared has few impurities and contains no metal ions, such as potassium and sodium, and does not require subsequent operations to remove metal ions and perform rectification separation, thereby reducing the costs and allowing same to be directly applied to high-standard industrial production.