Co-Producing HFO-1225ye and HFO-1234yf via Shared Unit Operations
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Solution Overview
Problem
Existing methods for producing fluorinated olefins like HFO-1225ye and HFO-1234yf require multiple unit operations, making them economically prohibitive due to substantial capital investment and operational complexity.
Innovation Solution
A process involving hydrogenation of hexafluoropropylene to produce intermediate fluorinated alkanes, followed by dehydrofluorination to yield both HFO-1225ye and HFO-1234yf in a single facility with four unit operations, allowing for flexible production and reduced economic burden.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate production facilities are built for HFO-1225ye and HFO-1234yf using prior art processes, then each product can be produced with established methods, but capital investment and operational complexity increase substantially
Solution Approach 1:
The patent applies universality by designing a single production facility that can produce both HFO-1225ye and HFO-1234yf using the same core process steps. The facility uses hexafluoropropylene as a common starting material and employs identical unit operations (hydrogenation reactor, separator, dehydrofluorination reactor, and second separator) to produce either product by adjusting reaction conditions and separation parameters, thereby eliminating the need for separate dedicated facilities for each product.
2Productivity
If multiple unit operations are used for each product as in prior art processes, then production of each fluorinated olefin can be achieved, but capital costs become economically prohibitive
Solution Approach 1:
The patent merges the production processes for HFO-1225ye and HFO-1234yf into a single integrated facility with four shared unit operations. Instead of requiring separate complete process trains for each product, the facility combines hydrogenation, separation, dehydrofluorination, and final separation steps that can produce either product, thereby reducing capital investment while maintaining productivity for both fluorinated olefins.
3Productivity
If four separate unit operations are required for each product, then complete production capability is achieved, but operational complexity and economic burden increase
Solution Approach 1:
The facility employs universal unit operations that can produce different products through parameter adjustment rather than requiring product-specific equipment. The hydrogenation reactor, separator, dehydrofluorination reactor, and second separator are designed to handle both HFO-1225ye and HFO-1234yf production by modifying reaction conditions and separation parameters, thereby reducing operational complexity while maintaining complete production capability for both fluorinated olefins.
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
Enables the efficient and cost-effective production of both HFO-1225ye and HFO-1234yf in a single facility, reducing capital costs and operational complexity while maximizing production efficiency.
Implementation Method 1
hydrogenating a starting material stream comprising at least one alkene according to Formula (I)
Implementation Method 2
dehydrofluorinating the fluorinated alkane intermediates produced in step (a) to produce a product stream comprising HFO-1225ye and HFO-1234yf
Implementation Method 3
separating the hydrogenation product stream produced in step (a) to produce an intermediate stream comprising at least one fluorinated alkane
Implementation Method 4
separating the product stream produced in step (c) to produce a first alternative product stream rich in HFO-1225ye and a second alternative product stream rich in HFO-1234yf
Data Source
Figure 1~3
Figure 4~4A
Figure 5
AI summary
A method for producing 1,1,1,2-tetrafluoropropene and/or 1,1,1,2,3-pentafluoropropene using a single set of four unit operations, the unit operations being (1) hydrogenation of a starting material comprising hexafluoropropene and optionally recycled 1,1,1,2,3-pentafluoropropene; (2) separation of the desired intermediate hydrofluoroalkane, such as 1,1,1,2,3,3-hexafluoropropane and/or 1,1,1,2,3-pentafluoropropane; (3) dehydrofluorination of the intermediate hydrofluoroalkane to produce the desired 1,1,1,2-tetrafluoropropene and/or 1,1,1,2,3-pentafluoropropene, followed by another separation to isolate the desired product and, optionally, recycle of the 1,1,1,2,3-pentafluoropropene.