Azeotrope-Like Fluorinated Olefin Solvent for Stable Cleaning
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Solution Overview
Problem
Volatile solvent compositions used in cleaning and refrigeration applications often experience liquid composition changes due to volatility, leading to inefficient cleaning and potential flammability issues, requiring the formation of azeotrope or azeotrope-like compositions where vapor and liquid phases have the same composition to maintain stability and effectiveness.
Innovation Solution
A composition containing 80 mol % to 99.9999 mol % of (Z)-1,2-dichloro-3,3,3-trifluoropropene and 0.0001 mol % to 20 mol % of (E)-1,2-dichloro-3,3,3-trifluoropropene, forming an azeotrope-like mixture that remains non-flammable and stable during use, preventing composition changes and ensuring consistent cleaning performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If volatile fluorinated alkanes are used as solvents or refrigerants, then cleaning power and refrigeration efficiency are improved, but composition changes occur during use due to volatility
Solution Approach 1:
The patent changes the volatility parameters of the solvent system by selecting specific fluorinated alkane components with complementary boiling points and forming azeotropic compositions. This parameter optimization ensures that the vapor and liquid phases maintain the same composition during evaporation, preventing composition drift while preserving cleaning effectiveness.
Solution Approach 2:
The patent employs composite solvent systems consisting of multiple fluorinated alkanes (such as HFC-134a, HFC-125, HFC-135a) blended in specific ratios to form azeotropic or near-azeotropic compositions. This composite approach combines the volatility characteristics of different components to achieve both high cleaning power and composition stability during use.
2Productivity
If fluorinated alkanes are used as refrigerants or cleaning agents, then performance is improved, but environmental harm increases due to global warming potential
Solution Approach 1:
The patent selects fluorinated alkane components with optimized global warming potential parameters while maintaining refrigeration efficiency. By choosing specific HFC blends (such as R-134a, R-125, R-135a) with lower GWP values compared to traditional CFCs and HCFCs, the system achieves environmental compatibility without sacrificing performance.
3Adaptability or versatility
If non-azeotropic mixtures are used, then flexibility in formulation is improved, but operational complexity increases due to composition changes requiring adjustment
Solution Approach 1:
The patent formulates azeotropic or near-azeotropic compositions where the vapor-liquid equilibrium composition matches the liquid phase composition. This parameter optimization eliminates composition drift during evaporation, ensuring that the solvent maintains its intended formulation characteristics throughout use without requiring monitoring or adjustment, thereby simplifying operations.
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 azeotrope-like composition maintains a consistent vapor and liquid phase composition, reducing operational burdens in cleaning and refrigeration applications, ensuring stable cleaning power and environmental safety by preventing flammability and composition changes, and allowing for efficient recovery and reuse of the solvent.
Implementation Method 1
it is preferable to form an azeotrope or azeotrope-like composition in that the vapor phase produced by volatilization has the same or substantially the same composition as does the liquid phase
Data Source
AI summary
What is disclosed is a liquid composition containing: 80 mol % to 99.9999 mol % of (Z)-1,2-dichloro-3,3,3-trifluoropropene (1223Z) and 0.0001 mol % to 20 mol % of (E)-1,2-dichloro-3,3,3-trifluoropropene (1223E). The liquid composition has small impact on the global environment and exerts azeotrope-like properties. Therefore, the composition of the liquid composition is not substantially changed even when the liquid composition is used in an open system or used for a long period. The composition of the liquid composition is also rarely changed even when the liquid composition is recovered by distillation. Therefore, the liquid mixture according to the present invention can be used suitably as a cleaning agent (a solvent).