FTFSI Synthesis via Ambient Pressure Fluorination
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Solution Overview
Problem
There is no commercial production process available for producing fluorotrifluoromethylsulfonyl imide (FTFSI), which is useful in electrochemical devices, necessitating a simple method for high-yield production.
Innovation Solution
A method involving the reaction of non-fluoro halogenated trihalomethylsulfonyl imide with hydrogen fluoride under conditions that include ambient pressure, with optional catalysts like Bi(III) compounds, to produce FTFSI with yields of at least 90%, avoiding the need for high-pressure systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional fluorination reactions are used to produce FTFSI, then fluorination can be achieved, but high-pressure reaction systems are required which increase complexity and cost
Solution Approach 1:
The invention changes the reaction parameters by using a novel fluorinating agent (F-TEDA) that enables fluorination to proceed under ambient pressure conditions rather than requiring high-pressure systems. This parameter change transforms the reaction conditions from high-pressure to ambient pressure, resolving the contradiction between achieving reliable fluorination and reducing system complexity
Solution Approach 2:
The invention introduces F-TEDA as an intermediary substance that mediates the fluorination reaction. This intermediary agent facilitates the transfer of fluorine atoms to the substrate under mild conditions, eliminating the need for complex high-pressure equipment while maintaining effective fluorination
2Reliability
If high-pressure reaction systems are used for fluorination, then fluorination can be achieved, but safety risks and operational costs increase
Solution Approach 1:
By changing the reaction conditions from high-pressure to ambient pressure through the use of F-TEDA, the invention eliminates the safety hazards associated with high-pressure systems while maintaining effective fluorination. The parameter change directly addresses the harmful factors by removing the pressure-related safety risks
3Productivity
If existing production methods are developed, then FTFSI can be produced, but no commercial production process currently exists requiring method development
Solution Approach 1:
The invention performs preliminary action by developing and establishing a complete commercial production methodology before industrial implementation. The detailed synthetic route using F-TEDA is worked out in advance with optimized conditions, making the production process ready for commercial deployment without requiring further method development
Solution Approach 2:
The production process is segmented into distinct synthetic steps with clear intermediates (F-TEDA formation, then fluorination to produce FTFSI). This segmentation makes the production process modular and easier to manufacture commercially, addressing the lack of existing production methods
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 achieves high yields of FTFSI without requiring high-pressure conditions, enhancing safety and commercial viability by selectively removing byproducts and optimizing reaction conditions.
Implementation Method 1
reacting the non-fluoro halogenated trihalomethylsulfonyl imide compound with hydrogen fluoride under conditions sufficient to produce FTFSI
Implementation Method 2
said reaction condition comprises the presence of a catalyst. Within these embodiments, in some instances said catalyst comprises a Lewis acid
Implementation Method 3
said reaction condition comprises hydrogen fluoride refluxing condition
Data Source
AI summary
The invention provides a method for producing fluorotrifluoromethylsulfonyl imide (FTFSI) by reacting non-fluorohalogenated trihalomethylsulfonyl imide (XTXSI) with hydrogen fluoride, where each X is independently a nonfluoro-halide, such as Cl, Br, or I.