HF Azeotropic Composition for HFC-143 Separation and Recycling
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Solution Overview
Problem
Conventional production methods of 1,1,2-trifluoroethane (HFC-143) result in unreacted raw materials and intermediates being wasted, leading to increased costs due to inefficient separation and recycling processes.
Innovation Solution
The development of azeotropic or azeotrope-like compositions comprising HFC-143 and hydrogen fluoride, which allows for efficient separation through distillation or liquid-liquid separation, enabling the collection of unreacted hydrogen fluoride and increasing yield.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional separation methods are used for unreacted raw materials and intermediates, then the separation process becomes complex and costly, but the recycling efficiency remains low leading to material waste
Solution Approach 1:
The invention changes the physical parameters of the mixture by forming an azeotropic composition with specific boiling point characteristics. This allows the unreacted raw materials and intermediates to be separated through distillation based on their azeotropic behavior, improving recycling efficiency while reducing material waste through effective separation and recovery
Solution Approach 2:
The invention introduces an intermediary substance (one of the three specified fluorinated compounds) that forms an azeotropic mixture with the unreacted raw materials and intermediates. This intermediary enables selective separation through distillation, allowing efficient recovery and recycling of valuable materials while minimizing waste
2Ease of manufacture
If conventional separation processes are applied, then the production cost increases due to inefficiency, but the separation capability remains insufficient
Solution Approach 1:
By exploiting the azeotropic composition parameters and boiling point differences, the invention enables efficient separation through standard distillation processes. This approach reduces production costs by eliminating complex separation requirements while achieving high separation capability through the inherent physical properties of the azeotropic mixture
Solution Approach 2:
The invention utilizes phase transition (distillation) based on the different boiling points of the azeotropic composition components. This allows for effective separation of unreacted raw materials and intermediates from the product, improving both separation capability and manufacturing efficiency while reducing production costs
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 proposed solution enables efficient separation and recycling of hydrogen fluoride, reducing waste and costs by utilizing azeotropic or azeotrope-like compositions in distillation processes, thereby enhancing the overall production efficiency of HFC-143.
Implementation Method 1
An azeotropic or azeotrope-like composition comprising 1,1,2-trifluoroethane (HFC-143) and hydrogen fluoride
Implementation Method 2
allows for efficient separation through distillation or liquid-liquid separation
Data Source
AI summary
The present disclosure provides a novel azeotropic or azeotrope-like composition comprising hydrogen fluoride and 1,1,2-trifluoroethane (HFC-143), 1-chloro-2,2-difluoroethane (HCFC-142), or 1,2-dichloro-1-fluoroethane (HCFC-141); and a separation method using the composition.An azeotropic or azeotrope-like composition comprising hydrogen fluoride and HFC-143. An azeotropic or azeotrope-like composition comprising hydrogen fluoride and HCFC-142. An azeotropic or azeotrope-like composition comprising hydrogen fluoride and HCFC-141. A separation method of a composition comprising hydrogen fluoride and at least one member selected from the group consisting of HFC-143, HCFC-142, and HCFC-141.