Solvent-Free Fluorination of Halogenated Hydrocarbons
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Solution Overview
Problem
Conventional processes for producing 1,2,3,4-tetrachlorohexafluorobutane require the use of a reaction solvent, leading to complex separation operations and inefficient production due to low raw material concentration, which complicates industrial-scale production.
Innovation Solution
A process involving the reaction of a halogenated hydrocarbon compound, such as 1,2,3,4-tetrachlorobutane, with fluorine gas in a liquid phase or solid-liquid coexistence state without a solvent or catalyst, optimizing reaction conditions like temperature and pressure to achieve high yield and purity of 1,2,3,4-tetrachlorohexafluorobutane.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a reaction solvent is used in the fluorination reaction, then the reaction can proceed, but the separation operation becomes complicated
Solution Approach 1:
The invention extracts and removes the reaction solvent from the fluorination reaction system. By conducting the reaction without any solvent, using only the raw materials (halogenated hydrocarbon and fluorine gas), the patent eliminates the need for complex solvent separation operations while maintaining reaction feasibility.
Solution Approach 2:
The reaction system serves itself by using the reactants themselves without requiring an external solvent medium. The halogenated hydrocarbon and fluorine gas react directly in their own presence, making the system self-sufficient and eliminating the need for separate solvent removal steps.
2Ease of manufacture
If a reaction solvent is used to dilute the raw material, then the reaction can be controlled, but the production efficiency decreases
Solution Approach 1:
The invention changes the concentration parameter by eliminating dilution entirely. Instead of using a solvent to dilute the raw material, the reaction is conducted with undiluted reactants, thereby maximizing the concentration of reactive species and improving production efficiency while maintaining reaction control through other means.
Solution Approach 2:
The reaction solvent used for dilution is extracted and removed from the system. This eliminates the dilution effect and allows the reaction to proceed with concentrated reactants, significantly improving production efficiency while reaction control is maintained through direct contact between reactants.
3Ease of manufacture
If a reaction solvent is used, then the reaction can proceed, but the separation and recovery process becomes complicated
Solution Approach 1:
The invention extracts and eliminates the reaction solvent from the process entirely. By conducting the fluorination reaction without any solvent, using only the halogenated hydrocarbon and fluorine gas as reactants, the patent completely removes the need for separation and recovery operations associated with solvent removal, simplifying the overall process.
Solution Approach 2:
The reaction system is designed to be self-sufficient without requiring an external solvent. The reactants themselves serve as the reaction medium, eliminating the need for separate solvent recovery and recycling operations, thereby greatly simplifying the ease of operation.
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 efficient, economical, and high-yield production of 1,2,3,4-tetrachlorohexafluorobutane, reducing the need for solvent separation and minimizing by-product formation, thus simplifying the production process and enhancing industrial applicability.
Implementation Method 1
causing a halogenated hydrocarbon compound to react with fluorine gas in a liquid phase or in a solid-liquid coexistence state in the absence of a solvent and a catalyst
Data Source
AI summary
The process for producing a fluorine-containing compound such as 1,2,3,4-tetrachlorohexafluorobutane of the present invention is characterized in that a halogenated hydrocarbon compound such as 1,2,3,4-tetrachlorobutane is brought into contact with fluorine gas in a liquid phase or in a solid-liquid coexistence state in the absence of a solvent and a catalyst. According to the present invention, a fluorine-containing compound is readily produced from a halogenated hydrocarbon compound using neither a reaction solvent nor a reaction catalyst.