Radiation-Based Hydrofluoroolefin Production With 95% Selectivity
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Solution Overview
Problem
Existing methods for producing hydrofluoroolefins and fluoroolefins suffer from low selectivity and require high temperatures, catalysts, and complex post-treatments due to the formation of by-products with similar boiling points.
Innovation Solution
Irradiating hydrofluorocarbons and hydrofluoroolefins with ionizing radiation and ultraviolet rays of 300 nm or less to selectively break chemical bonds and produce hydrofluoroolefins and fluoroolefins, eliminating the need for catalysts and high temperatures, and reducing by-product formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If thermal decomposition or catalytic reaction methods are used to produce hydrofluoroolefins, then the production process can proceed, but the selectivity is low and by-products with similar boiling points are formed requiring complex post-treatments
Solution Approach 1:
The invention changes the fundamental reaction parameters by using ionizing radiation (gamma rays, electron beams) or ultraviolet irradiation instead of thermal energy or catalysts. This parameter change leads to selective bond cleavage at the C-F bond, producing the desired hydrofluoroolefin with high selectivity (95 mol% or more) and minimal by-products, thereby eliminating the need for complex post-treatment separation processes
Solution Approach 2:
The invention replaces the mechanical/thermal system (heating to high temperatures for thermal decomposition) or catalytic system with a radiation-based system. The use of ionizing radiation or UV light directly breaks chemical bonds through photochemical effects, substituting the need for thermal energy input and catalyst materials, thus simplifying the overall process system while improving selectivity
2Ease of manufacture
If thermal decomposition method is used, then the reaction can proceed without catalysts, but high temperatures are required which increases energy consumption
Solution Approach 1:
The invention replaces the thermal system with a radiation-based photochemical system. Instead of heating the reactants to high temperatures to provide activation energy, the invention uses ionizing radiation or ultraviolet light to directly break the C-F bond through photochemical effects, thereby eliminating the need for high-temperature heating and significantly reducing energy consumption while maintaining process simplicity without catalysts
Solution Approach 2:
The invention fundamentally changes the energy input parameter from thermal energy (heat) to electromagnetic radiation energy. This parameter change allows the reaction to proceed at lower temperatures by utilizing the high energy of ionizing radiation or UV photons to break chemical bonds directly, thus reducing the overall energy consumption of the process while maintaining ease of manufacture
3Productivity
If conventional methods are used, then production can continue with existing technology, but by-products are formed requiring separation and purification steps
Solution Approach 1:
The invention changes the reaction mechanism parameter from thermal decomposition or catalytic reaction to radiation-induced decomposition. This parameter change results in highly selective C-F bond cleavage that produces the desired hydrofluoroolefin with 95 mol% or higher selectivity and minimal by-products, thereby reducing material loss in post-treatment separation while maintaining production continuity through a streamlined process
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 method achieves high selectivity of target compounds (95.0 mol% or more) with minimal by-products, eliminating the need for post-treatment and catalysts, and allows production at lower temperatures.
Implementation Method 1
irradiating at least one starting material compound selected from the group consisting of hydrofluorocarbons having one or two carbon atoms and hydrofluoroolefin As having two or three carbon atoms with ionizing radiation
Implementation Method 2
irradiating at least one starting material compound selected from the group consisting of hydrofluorocarbons having one or two carbon atoms and hydrofluoroolefin As having two or three carbon atoms with ionizing radiation and/or an ultraviolet ray having a wavelength of 300 nm or less
Data Source
AI summary
This disclosure provides a method for producing a hydrofluoroolefin (HFO) or fluoroolefin (FO), which is a target compound, with high selectivity, without requiring a high temperature and a catalyst in a synthesis process of the target compound. Specifically, the present disclosure provides a method for producing a hydrofluoroolefin or fluoroolefin having two, three, or four carbon atoms, comprising irradiating at least one starting material compound selected from the group consisting of hydrofluorocarbons having one or two carbon atoms and hydrofluoroolefin As having two or three carbon atoms with ionizing radiation and/or an ultraviolet ray having a wavelength of 300 nm or less, with the proviso that when the at least one starting material compound is the hydrofluoroolefin A, the resulting hydrofluoroolefin is different from the hydrofluoroolefin A.