Acrylate Ester Fluorination via Hydrofluorocarbon Solvent
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for synthesizing alpha-fluoroacrylic acid or alpha-fluoroacrylate monomers are not commercially viable due to over-fluorination and high costs of starting materials.
Innovation Solution
A process involving the direct fluorination of acrylate esters or derivatives using fluorine gas in a hydrofluorocarbon solvent, followed by hydrogen fluoride elimination, to produce difluoropropionic acid or derivatives with a yield of at least 50%, utilizing specific solvents, temperatures, and additives to minimize side reactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional methods are used to synthesize alpha-fluoroacrylic acid or alpha-fluoroacrylate monomers, then the synthesis can be performed, but over-fluorination occurs and costs are high making it not commercially viable
Solution Approach 1:
The patent changes the reaction parameters by using fluorine gas in a hydrofluorocarbon solvent at controlled temperatures to achieve selective monofluorination. This parameter optimization prevents over-fluorination while maintaining commercial viability through improved yield and reduced waste
Solution Approach 2:
The patent introduces a hydrofluorocarbon solvent as an intermediary medium to facilitate the fluorination reaction. This solvent acts as a mediator that enables controlled fluorine transfer to the acrylate ester, preventing uncontrolled over-fluorination while maintaining reaction efficiency
2Productivity
If fluorine gas is used to fluorinate acrylate esters, then difluoropropionic acid can be produced, but over-fluorination occurs reducing yield
Solution Approach 1:
The patent optimizes reaction parameters including temperature control and stoichiometry to achieve selective fluorination. By carefully controlling these parameters, the process maximizes yield of the desired difluoropropionic acid while minimizing over-fluorinated byproducts
Solution Approach 2:
The patent uses controlled excess of fluorine gas under specific conditions to ensure complete conversion of the starting material while the reaction conditions prevent further over-fluorination. This controlled partial action achieves high yield without excessive fluorination
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
This process provides a commercially efficient and cost-effective method for producing alpha-fluoroacrylate esters or difluoropropionic acids with controlled fluorination, maximizing yield and minimizing over-fluorination.
Implementation Method 1
the direct fluorination of an acrylate ester or a derivative thereof using fluorine gas
Implementation Method 2
followed by elimination of hydrogen fluoride
Data Source
AI summary
The present invention generally relates to processes for converting acrylate esters or a derivative thereof to difluoropropionic acid or a derivative thereof. This process is generally performed using fluorine gas in a hydrofluorocarbon solvent.