HCFO-1233zd Solvent Composition for Low-GWP Heat Transfer and Cleaning
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Solution Overview
Problem
Existing solvents and heat transfer fluids, such as hydrofluorocarbons (HFCs), have significant global warming potential (GWP) and ozone depletion potential (ODP), necessitating the development of alternatives that are environmentally friendly.
Innovation Solution
The use of hydrochlorofluoroolefin (HCFO-1233zd), preferably the trans-isomer, as a solvent/cleaning composition and heat transfer fluid, combined with co-agents like hydrofluorocarbons and hydrofluoroolefins, which offers negligible ozone depletion potential and low GWP, along with improved solvency and safety characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If hydrofluorocarbons (HFCs) are used as alternative solvents to replace CFCs and HCFCs, then ozone depletion potential is reduced, but global warming potential remains significant
Solution Approach 1:
The patent changes the chemical composition parameters by introducing HCFO-1233zd with specific molecular structure (containing chlorine, fluorine, and olefinic bond) to achieve both low ODP and low GWP simultaneously, moving beyond the HFC parameter space
Solution Approach 2:
The patent creates composite cleaning formulations by combining HCFO-1233zd with co-agents (HFCs, HFOs, hydrocarbons, ethers, esters, ketones, alcohols) to optimize both environmental performance and cleaning effectiveness
2Reliability
If traditional chlorofluorocarbons and hydrochlorofluorocarbons are used as solvents, then effective cleaning performance is achieved, but environmental harm (ODP and GWP) increases
Solution Approach 1:
The patent converts the traditionally harmful chlorine atom into a beneficial feature by placing it in an olefinic compound structure (HCFO-1233zd) where it contributes to high cleaning effectiveness while the overall molecule achieves negligible ODP and low GWP through its unique composition
3Object-generated harmful factors
If new environmentally friendly solvents are developed to replace traditional compounds, then environmental safety is improved, but solvency and handling safety may be compromised
Solution Approach 1:
The patent optimizes multiple parameters simultaneously: molecular weight, boiling point, vapor pressure, and chemical structure of HCFO-1233zd to achieve the right balance between environmental friendliness and functional performance including solvency and handling safety
Solution Approach 2:
The patent formulates composite cleaning compositions combining HCFO-1233zd with co-agents selected for their complementary properties, achieving enhanced overall performance including improved solvency, safety, and environmental characteristics
Data Source
AI summary
The present invention relates to solvent/cleaner and heat transfer fluid compositions comprising at least one hydrochlorofluoroolefin (HCFO), 1-chloro-3,3,3-trifluoropropene (HCFO-1233zd), particularly the trans-isomer. The HCFO of the present invention can be used in combination with co-agents including, hydrofluorocarbons (HFCs), hydrofluoroolefins (HFOs), hydrocarbons, ethers including hydrofluoroethers (HFEs), esters, ketones, alcohols, 1,2-transdichloroethylene and mixtures thereof.