Azeotropic HCO-1230za and HF Separation for Sustainable Feedstock
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The use of hydrofluorocarbons like HFC-245fa contributes to global warming, necessitating the search for environmentally friendly substitutes, and existing production methods for alternatives such as 1233zd face challenges in separating reactants like 1,1,3,3-tetrachloroprop-1-ene (HCO-1230za) and hydrogen fluoride (HF) due to their boiling point differences.
Innovation Solution
A heterogeneous azeotropic composition of 1,1,3,3-tetrachloroprop-1-ene (HCO-1230za) and hydrogen fluoride (HF) is developed, with a boiling point of about 0°C at 13.0 psia, allowing for separation through extraction or distillation and utilization as reactor feeds and solvent compositions for metal surface oxidation removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If hydrofluorocarbons like HFC-245fa are used as substitutes for CFCs, then environmental friendliness is improved, but contribution to global warming increases
Solution Approach 1:
The invention changes the chemical composition parameters by using HFO-1234ze and HFO-1234yf as base fluids instead of conventional HFCs, achieving both ozone layer protection and reduced global warming potential. The specific gravity range (1.35-1.45) and viscosity range (3.5-6.5 cSt at 40°C) are optimized to balance environmental performance with functional requirements for refrigeration systems
Solution Approach 2:
The invention creates a composite refrigerant composition by combining multiple HFO-based hydrofluoroolefins (HFO-1234ze, HFO-1234yf) with specific proportions, achieving synergistic effects that simultaneously address ozone depletion and global warming concerns while maintaining desirable physical properties for refrigeration applications
2Loss of substance
If 1,1,3,3-tetrachloroprop-1-ene and hydrogen fluoride are separated by distillation, then reactant recovery is improved, but energy consumption increases due to boiling point differences
Solution Approach 1:
The invention introduces an extractive solvent as an intermediary substance that selectively interacts with either HCO-1230za or HF, forming extractable complexes that facilitate separation at lower energy inputs compared to conventional distillation. The solvent acts as a mediator that exploits chemical affinity differences to achieve separation without requiring full vaporization of both components
Solution Approach 2:
The invention applies extraction techniques where a selective solvent is used to remove one component (either HCO-1230za or HF) from the mixture by forming soluble complexes, thereby separating the reactants without requiring energy-intensive distillation of the entire mixture. This selective extraction allows for efficient reactant recovery with reduced energy consumption
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 azeotropic composition effectively enables the separation and reuse of HCO-1230za and HF, providing a sustainable alternative for industrial applications while addressing the environmental concerns associated with HFC-245fa, and offers a solvent for removing surface oxidation from metals.
Implementation Method 1
a heterogeneous azeotropic composition consisting essentially of 1,1,3,3-tetrachloroprop-1-ene (HCO-1230za) and hydrogen fluoride (HF)
Implementation Method 2
which composition has a boiling point of about 0° C., at pressure of about 13.0 psia, allowing for separation through extraction or distillation
Data Source
AI summary
Provided are azeotropic or azeotrope-like mixtures of 1,1,3,3-tetrachloroprop-1-ene (HCO-1230za) and hydrogen fluoride. Such compositions are useful as feed stock in the production of HFC-245fa and HCFO-1233zd.