Fluorinated 1,3-Dioxolan-2-One Synthesis via Liquid-Liquid Reaction
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Solution Overview
Problem
Existing processes for preparing fluorinated 1,3-dioxolan-2-one require solid-liquid reactions with metallic fluorides, leading to slower reaction rates and the need for additional steps to remove solids, while maintaining low yields.
Innovation Solution
A liquid-liquid reaction process using amine hydrofluoride as a fluorinating agent with halogenated 1,3-dioxolan-2-one in an organic solvent, optimizing mole ratios and reaction conditions to enhance reactivity and yield, followed by rectification and antacid treatment to achieve high purity fluorinated EC.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If solid metallic fluoride is used as a fluorinating agent, then fluorinated EC can be produced, but the reaction rate is slow and additional solid removal steps are required
Solution Approach 1:
The patent changes the physical state parameter of the fluorinating agent from solid (metallic fluoride) to liquid (amine hydrofluoride). This parameter change transforms the reaction system from solid-liquid to liquid-liquid, dramatically increasing the reaction rate and eliminating the need for solid removal steps while maintaining high yield of fluorinated EC
Solution Approach 2:
The patent introduces an amine component as an intermediary that forms amine hydrofluoride complex. This intermediary facilitates the fluorination reaction by providing a liquid-phase fluorinating agent that is more reactive and easier to handle than solid metallic fluoride, while the amine component also helps in subsequent product isolation
2Ease of manufacture
If solid metallic fluoride is used as a fluorinating agent, then fluorinated EC can be produced, but additional steps for removing solids are required
Solution Approach 1:
By changing the fluorinating agent from solid to liquid state, the patent eliminates the need for filtration or centrifugation steps required to remove solid residues. The liquid-liquid reaction system allows for simpler phase separation and purification processes, reducing the overall number of manufacturing steps
Solution Approach 2:
The patent extracts the problematic solid component (metallic fluoride) from the reaction system and replaces it with a liquid alternative (amine hydrofluoride). This extraction of the solid phase eliminates the need for solid removal operations while maintaining the essential fluorination function
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 process significantly reduces reaction time, maintains high yields (80-85%), and eliminates the need for solid removal steps, producing high-purity fluorinated EC with minimal halogen radicals, suitable for use in electrochemical devices.
Implementation Method 1
reacting a derivative of 1,3-dioxolan-2-one... with an amine hydrofluoride in an organic solvent
Implementation Method 2
followed by rectification and antacid treatment to achieve high purity fluorinated EC
Data Source
AI summary
The present invention provides a process for preparing fluorinated 1,3-dioxolan-2-one by reacting a derivative of 1,3-dioxolan-2-one having halogen atom other than fluorine with an amine hydrofluoride in an organic solvent, and in this preparation process, fluorinated 1,3-dioxolane-2-on can be prepared in a short period of time by liquid-liquid reaction while maintaining high yield, by using a derivative of 1,3-dioxolan-2-one having halogen atom other than fluorine as a starting material and fluorinating the derivative with a fluorinating agent.