HCFO-1233yd Purification via Basic Aqueous Extraction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for producing 1-chloro-2,3,3-trifluoropropene (HCFO-1233yd) do not effectively remove 1-chloro-3,3-difluoro-1-propyne and oxide by-products, which can impair the reliability and stability of the compound when used as cleaning agents, solvents, refrigerants, or aerosols.
Innovation Solution
A method involving contact of the composition containing HCFO-1233yd with a basic aqueous solution, preferably an alkali metal hydroxide or ammonia solution, at temperatures between 10°C to 60°C, to dissolve and remove 1-chloro-3,3-difluoro-1-propyne and oxide, thereby purifying HCFO-1233yd.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If HCFO-1233yd is produced by reacting 3-chloro-1,1,2,2-tetrafluoropropane with hydrogen fluoride in a vapor phase, then HCFO-1233yd is obtained as a product, but 1-chloro-3,3-difluoro-1-propyne and oxide are produced as by-products that cannot be effectively removed
Solution Approach 1:
The patent applies extraction by contacting the reaction mixture with a basic aqueous solution to selectively remove the harmful by-products (1-chloro-3,3-difluoro-1-propyne and oxide) from the HCFO-1233yd product. The basic solution extracts these impurities through chemical reaction, allowing the pure product to be separated and obtained.
Solution Approach 2:
The patent changes the chemical environment by introducing a basic aqueous solution to alter the state of the by-products. The basic conditions cause the by-products to react and form water-soluble compounds, changing their solubility parameters and enabling their removal from the organic product phase.
2Ease of manufacture
If 1-chloro-3,3-difluoro-1-propyne is contained in the composition at a high concentration, then the composition can be produced more easily, but reliability and performance deteriorate
Solution Approach 1:
The patent removes 1-chloro-3,3-difluoro-1-propyne from the composition by contacting with basic aqueous solution. This extraction process selectively eliminates the harmful component while retaining the desired HCFO-1233yd product, thereby improving reliability without significantly complicating the manufacturing process.
Solution Approach 2:
The patent converts the harmful effect of 1-chloro-3,3-difluoro-1-propyne into a beneficial separation process. By using the chemical reactivity of the impurity with basic solutions, the patent transforms a manufacturing challenge into an efficient purification step that enhances product quality.
3Ease of manufacture
If oxide is contained in the composition at a high concentration, then the composition can be produced more easily, but stability deteriorates and acidifying agents form
Solution Approach 1:
The patent removes oxide from the composition through contact with basic aqueous solution. The oxide reacts with the basic solution to form water-soluble products that can be separated from the organic phase, effectively eliminating the stability-deteriorating impurity while maintaining ease of manufacture.
Solution Approach 2:
The patent converts the harmful oxide impurity into a removable substance by exploiting its reactivity with basic solutions. This transformation turns a stability problem into an efficient purification opportunity, where the impurity's chemical properties are used against it to enable easy removal.
4Device complexity
If conventional separation methods are used to separate HCFO-1233yd from by-products, then the production process is simple, but the removal efficiency of 1-chloro-3,3-difluoro-1-propyne and oxide is insufficient
Solution Approach 1:
The patent changes the chemical parameters of the system by introducing a basic aqueous solution. This parameter change fundamentally alters the solubility and reactivity characteristics of the by-products, enabling highly efficient removal through simple contact and separation operations without complex equipment.
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 efficiently removes 1-chloro-3,3-difluoro-1-propyne and oxide from the composition, resulting in a highly pure HCFO-1233yd with improved stability and performance characteristics, suitable for various applications.
Implementation Method 1
contacting a composition comprising 1-chloro-2,3,3-trifluoropropene and at least one member selected from 1-chloro-3,3-difluoro-1-propyne and an oxide, with a basic aqueous solution, to remove said at least one member selected from 1-chloro-3,3-difluoro-1-propyne and an oxide
Data Source
AI summary
To provide a method for producing 1-chloro-2,3,3-trifluoropropene, whereby it is possible to efficiently remove 1-chloro-3,3-difluoro-1-propyne and/or an oxide from a composition comprising 1-chloro-2,3,3-trifluoropropene. A method for producing 1-chloro-2,3,3-trifluoropropene, in which a composition comprising 1-chloro-2,3,3-trifluoropropene and at least one member selected from 1-chloro-3,3-difluoro-1-propyne and an oxide, is brought into contact with a basic aqueous solution to remove said at least one member selected from 1-chloro-3,3-difluoro-1-propyne and an oxide, from the composition.