Fluoroolefin Stabilizer Composition for High-Temperature Refrigerants
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Solution Overview
Problem
Fluoroolefins used as refrigerants degrade due to instability at high temperatures and oxidation by air, limiting their practical application in cooling systems despite their potential for low global warming potential and other favorable attributes.
Innovation Solution
Incorporating an effective amount of stabilizers such as epoxides, fluorinated epoxides, thiophosphates, butylated triphenylphosphorothionates, and other compounds into fluoroolefin compositions to prevent degradation and oxidation, thereby enhancing their stability and performance in refrigeration and air-conditioning systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If fluoroolefins are used as refrigerants, then global warming potential is reduced, but stability at high temperatures deteriorates
Solution Approach 1:
Epoxides and fluorinated epoxides are introduced as intermediary substances that protect fluoroolefins from thermal degradation. These stabilizers act as mediators between the fluoroolefin and the high-temperature environment, preventing direct harmful interactions while allowing the refrigerant to function at required operating temperatures.
Solution Approach 2:
The chemical composition parameters of the refrigerant system are changed by adding specific stabilizing compounds (epoxides and fluorinated epoxides) in controlled amounts. This modifies the overall stability parameter of the system without significantly altering the refrigeration performance or GWP characteristics of the fluoroolefin base.
2Stability of the object's composition
If stabilizers are added to fluoroolefin compositions, then stability is improved, but device complexity increases
Solution Approach 1:
The composition is modified by adding stabilizing compounds within specific concentration ranges (0.01-10% by weight). This parameter change approach allows optimization of stability while controlling complexity - the stabilizers are added in sufficient amounts to provide protection but limited enough to avoid excessive complexity in system design, handling, and regulation.
Data Source
AI summary
The present invention relates to compositions comprising at least one fluoroolefin and an effective amount of stabilizer that may be an epoxide, fluorinated epoxide or oxetane, or a mixture thereof with other stabilizers. The stabilized compositions may be useful in cooling apparatus, such as refrigeration, air-conditioning, chillers, and heat pumps, as well as in applications as foam blowing agents, solvents, aerosol propellants, fire extinguishants, and sterilants.