Sulfuryl Fluoride Electrofluorination Using Hydrogen Fluoride Complexes
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Solution Overview
Problem
Existing electrofluorination methods for producing sulfuryl fluoride require inert gases and large amounts of anhydrous hydrogen fluoride, leading to high costs and low yield and purity, necessitating additional purification steps, making them unsuitable for industrial production.
Innovation Solution
A method involving an electrofluorination reaction using sulfur dioxide and a hydrogen fluoride complex as main raw materials, without the need for solvents or diluent gases, employing specific reaction conditions and electrodes to enhance yield and purity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If sulfur dioxide and anhydrous hydrogen fluoride are used as main raw materials for electrofluorination, then the reaction can proceed, but the cost increases due to requiring inert gas diluent and large amounts of anhydrous hydrogen fluoride
Solution Approach 1:
The patent changes the physical state parameter of hydrogen fluoride from anhydrous (gas) to hydrated form (liquid solution), allowing the reaction to proceed without requiring large amounts of material or inert gas diluent, thereby reducing both cost and quantity requirements
Solution Approach 2:
The patent introduces water as an intermediary substance that forms a hydrate complex with hydrogen fluoride (HF·nH2O), which serves as the actual reactive species. This intermediary allows the reaction to proceed milder and more efficiently without requiring excess anhydrous HF or inert gas
2Productivity
If sulfur dioxide and anhydrous hydrogen fluoride are used for electrofluorination, then the reaction can proceed, but the yield and purity of sulfuryl fluoride are low requiring additional purification
Solution Approach 1:
The patent changes the reaction medium from anhydrous conditions to hydrated conditions, which fundamentally alters the reaction pathway and product distribution, resulting in higher yield and purity of sulfuryl fluoride that eliminates the need for complex purification steps
Solution Approach 2:
The patent converts the typically problematic presence of water (which would interfere with anhydrous reactions) into a beneficial component by using hydrated hydrogen fluoride as the reagent, thereby achieving better reaction outcomes and simpler purification
3Reliability
If inert gas such as helium is used as diluent gas in electrofluorination, then the reaction safety is improved, but the production cost increases
Solution Approach 1:
The patent uses water molecules as an intermediary that form hydrate complexes with hydrogen fluoride, which naturally moderate the reaction conditions and provide inherent safety without requiring inert gas diluent, thereby eliminating the cost of inert gas while maintaining safety
Solution Approach 2:
The patent changes the reaction from using gaseous anhydrous HF to liquid hydrated HF solution, which inherently provides better heat transfer and reaction control, improving safety without the need for expensive inert gas systems
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 method achieves a sulfuryl fluoride yield of 50% or more and purity of 90% or more, reducing production costs and eliminating the need for special purification procedures, making it suitable for industrial applications.
Implementation Method 1
electrofluorination reaction in an electrolytic cell
Data Source
AI summary
The present application provides a method for preparing sulfuryl fluoride by electrofluorination. The method for preparing sulfuryl fluoride by electrofluorination comprises a step of subjecting sulfur dioxide and a hydrogen fluoride complex to an electrofluorination reaction in an electrolytic cell. By means of the present application, the production cost of sulfuryl fluoride can be reduced, and the purity and yield of sulfuryl fluoride can be improved, thus making it suitable for industrial production.