Azeotropic E-FO-1336mzz and HCFO-1233xf Refrigerant Composition
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Solution Overview
Problem
There is a need for compositions that do not contribute to stratospheric ozone depletion and have low global warming potentials, replacing ozone-depleting chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs), while also maintaining stability in applications such as refrigeration and foam expansion, where non-azeotropic mixtures can lead to performance issues and flammability.
Innovation Solution
The development of an azeotropic composition consisting essentially of E-1,1,1,4,4,4-hexafluoro-2-butene (E-FO-1336mzz) and 2-chloro-3,3,3-trifluoropropene (HCFO-1233xf), which forms a stable mixture with specific mole percentages to maintain consistent boiling points and performance across various pressures and temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If non-azeotropic mixtures are used as refrigerants or blowing agents, then composition flexibility is improved, but composition stability deteriorates leading to performance issues and flammability
Solution Approach 1:
The patent applies parameter changes by formulating a specific composition ratio of E-FO-1336mzz (70-95 mole%) and HCFO-1233xf (5-30 mole%) to create an azeotropic mixture. This specific parameter range ensures the mixture maintains constant composition during phase changes, resolving the contradiction between composition flexibility and stability.
2Object-affected harmful factors
If HFCs are used to replace CFCs and HCFCs, then ozone depletion is prevented, but global warming potential increases
Solution Approach 1:
The patent changes the chemical composition parameters by using hydrofluoroolefins (E-FO-1336mzz and HCFO-1233xf) instead of conventional HFCs. These hydrofluoroolefins have both zero ozone depletion potential and lower global warming potential, resolving the contradiction between preventing ozone depletion and reducing global warming impact.
3Stability of the object's composition
If azeotropic composition is used, then composition stability is improved, but refrigerant performance may be limited
Solution Approach 1:
The patent applies composite materials by combining two different hydrofluoroolefin compounds (E-FO-1336mzz and HCFO-1233xf) in specific proportions to form an azeotropic mixture. This composite approach maintains composition stability while achieving reliable refrigerant performance through synergistic effects of the components.
Data Source
Figure 1
AI summary
Azeotropic or azeotrope-like compositions are disclosed. The azeotropic or azeotrope-like compositions are mixtures of E-1,1,1,4,4,4-hexafluoro-2-butene with E-1-chloro-3,3,3-trifluoropropene or 2-chloro-3,3,3-trifluoropropene. Also disclosed is a process of preparing a thermoplastic or thermoset foam by using such azeotropic or azeotrope-like compositions as blowing agents. Also disclosed is a process of producing refrigeration by using such azeotropic or azeotrope-like compositions. Also disclosed is a process of using such azeotropic or azeotrope-like compositions as solvents. Also disclosed is a process of producing an aerosol product by using such azeotropic or azeotrope-like compositions. Also disclosed is a process of using such azeotropic or azeotrope-like compositions as heat transfer media. Also disclosed is a process of extinguishing or suppressing a fire by using such azeotropic or azeotrope-like compositions. Also disclosed is a process of using such azeotropic or azeotrope-like compositions as dielectrics.