HCFO-1233yd(Z)-tDCE Azeotropic Composition for Stable Cycling
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Solution Overview
Problem
Existing compositions using fluoroolefins in combination with other components face issues of composition change due to boiling point differences and safety concerns, particularly when evaporated and condensed repeatedly, affecting performance and safety.
Innovation Solution
The development of azeotropic and azeotrope-like compositions comprising (Z)-1-chloro-2,3,3-trifluoropropene (HCFO-1233yd(Z)) and trans-1,2-dichloroethylene (tDCE) with specific mass ratios, ensuring stability and non-flammability, and allowing for repeated evaporation and condensation without significant composition change.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fluoroolefins are used in combination with other components, then required performance can be sufficiently developed, but composition change occurs during use due to boiling point differences
Solution Approach 1:
The patent forms an azeotropic composition by selecting specific components (fluoroolefin and hydrocarbon) in predetermined proportions that create a constant boiling point mixture. This parameter change from individual component properties to mixture properties resolves the composition instability issue while maintaining the enhanced performance benefits of combination use.
Solution Approach 2:
The patent creates a composite azeotropic mixture of fluoroolefin and hydrocarbon components with specific mass ratios. This composite material approach allows the system to achieve the performance advantages of multi-component combinations while eliminating the composition separation problem through the azeotropic effect.
2Reliability
If components with flash point are used in combination, then performance requirements can be met, but safety countermeasures are required
Solution Approach 1:
The patent uses hydrocarbon components that create a non-flammable or low-flammability environment when mixed with fluoroolefin in azeotropic proportions. This inert environment approach eliminates the need for safety countermeasures while maintaining the performance benefits of component combination.
3Stability of the object's composition
If CFCs, HCFCs and HFCs are used, then stability and drying property are excellent, but they have negative influences over the ozone layer and global warming
Solution Approach 1:
The patent changes the chemical composition parameters from traditional CFC/HCFC/HFC compounds to fluoroolefin-hydrocarbon azeotropic mixtures. This parameter change maintains the desirable stability and drying properties while eliminating the harmful environmental effects of ozone depletion and global warming.
Solution Approach 2:
The patent converts the potential harm of using alternative refrigerants into a benefit by selecting fluoroolefin-hydrocarbon combinations that provide both environmental friendliness and operational stability. The azeotropic composition ensures that the alternative refrigerant mixture performs as reliably as traditional refrigerants without the environmental damage.
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 compositions exhibit stable performance as detergents, solvents, and heat transfer fluids with minimal environmental impact, maintaining consistency across multiple cycles and avoiding flammability, suitable for various applications including cleaning and heat transfer systems.
Implementation Method 1
an azeotropic composition, an azeotrope-like composition and a composition, which have little influence over the global environment, which are non-flammable, and which are less likely to undergo composition change even when evaporated and condensed repeatedly
Data Source
Figure 1
AI summary
To provide an azeotropic composition, an azeotrope-like composition and a composition, which have little influence over the global environment, which are non-flammable, and which are less likely to undergo composition change even when evaporated and condensed repeatedly, and a detergent, a solvent and a heat transfer fluid, which contain the azeotropic composition, the azeotrope-like composition or the composition. An azeotropic composition consisting essentially of 34.5 mass% of (Z)-1-chloro-2,3,3-trifluoropropene and 65.5 mass% of trans-1,2-dichloroethylene, and an azeotrope-like composition consisting essentially of from 28 to 41 mass% of (Z)-1-chloro-2,3,3-trifluoropropene and from 59 to 72 mass% of trans-1,2-dichloroethylene.