Aromatic Bis Ether Production with Controlled Reaction Water
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Solution Overview
Problem
Existing methods for producing aromatic bis ether compounds face challenges in industrial stability and yield due to increased water content in the reaction system, leading to impurities and decreased efficiency.
Innovation Solution
Control the amount of water in the reaction solution to be between 0.01 wt % and 1.5 wt % relative to the aromatic dihydroxy compound, using specific reaction conditions and dehydration techniques to maintain optimal reaction conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If water washing is performed in the same reaction vessel for industrial production, then the inorganic base can be removed, but water accumulates in the reaction system leading to decreased yield and increased impurities
Solution Approach 1:
The patent divides the water washing operation from the reaction process by using a separate washing vessel. The reaction vessel is dedicated to the etherification reaction, while a separate washing vessel handles the water washing step. This segmentation prevents water accumulation in the reaction system and maintains high yield while still enabling effective removal of inorganic base.
Solution Approach 2:
The patent extracts the water washing function from the reaction vessel by introducing a separate washing vessel. This extraction removes the harmful effect of water accumulation while preserving the beneficial effect of base removal. The inorganic base is removed through water washing in the separate vessel, but the reaction vessel remains free of excess water.
2Ease of manufacture
If water washing is performed in the same reaction vessel, then base removal is achieved, but reaction rate slows down due to increased water content
Solution Approach 1:
The patent segments the reaction and washing processes into separate vessels. The reaction vessel maintains optimal conditions for etherification by excluding excess water, thus preserving high reaction rate. The washing vessel handles base removal independently, allowing the reaction to proceed at optimal speed without water inhibition.
Solution Approach 2:
The patent extracts the water washing operation from the reaction system. By using a separate washing vessel, the reaction vessel remains free of water that would slow down the etherification reaction. The base removal function is extracted to the washing vessel where water can be used effectively without affecting reaction rate.
3Ease of manufacture
If water washing is performed in the same reaction vessel, then inorganic base is removed, but impurities increase in the reaction system
Solution Approach 1:
The patent segments the reaction and washing functions into separate vessels. The reaction vessel produces the target compound with minimal impurities by excluding water during reaction. The washing vessel handles base removal and contains any potential impurities from washing, preventing them from contaminating the reaction system.
Solution Approach 2:
The patent extracts the washing function from the reaction vessel. This extraction prevents water-soluble impurities from forming during the reaction. The inorganic base and any washing-related impurities are removed in the separate washing vessel, keeping the reaction system clean and producing high-purity target compound.
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 enables the production of aromatic bis ether compounds in an industrially stable manner with high yield, reducing impurities and improving reaction efficiency.
Implementation Method 1
control the amount of water in a reaction solution to be between 0.01 wt % and 1.5 wt % relative to the aromatic dihydroxy compound
Data Source
AI summary
An object is to provide a new method for producing an aromatic bis ether compound in an industrially stable manner and in high yield. As a solution, a method for producing an aromatic bis ether compound represented by formula (3), in which in a reaction between an aromatic dihydroxy compound (1) represented by formula (1) above and a halide (2) represented by formula (2) above, the amount of water in a reaction solution is 0.01 wt % or more and 1.5 wt % or less relative to the amount of the aromatic dihydroxy compound (1) in the reaction solution, is provided.