One-Step Ionic Liquid Synthesis Without Halide Residues
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for synthesizing ionic liquids, particularly quaternary ammonium salts, face limitations such as the use of toxic reagents, limited anion versatility, and residual halide ions, which affect the purity and stability of the final products, making them unsuitable for large-scale industrial applications and lithium ion secondary batteries.
Innovation Solution
A one-step reaction method involving a nitrogenous or phosphorous compound, a proton compound, and a carbonate ester is employed to synthesize ionic liquids, allowing for a broader range of anions and eliminating the need for halogenated reagents, thereby enhancing product purity and reducing production costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional methods using halogenated reagents are employed to synthesize quaternary ammonium salts, then the synthesis process is straightforward, but residual halide ions remain in the final product, reducing purity and stability
Solution Approach 1:
The invention extracts and eliminates the harmful halide ion residues from the synthesis process by replacing halogenated reagents with carbonate esters and proton compounds, thereby producing high-purity ionic liquids without halide contamination
Solution Approach 2:
The invention changes the chemical parameters of the synthesis process by using carbonate esters and proton compounds instead of traditional halogenated reagents, transforming the reaction mechanism to produce ionic liquids with superior purity and stability
2Adaptability or versatility
If conventional synthesis methods are used, then the process is simple, but the anion versatility is limited
Solution Approach 1:
The invention applies universality by using carbonate esters and proton compounds as versatile reagents that can produce a wide range of anions (including BF4-, PF6-, CF3SO3-, N(CF3SO2)2-, AlCl4-, and others) through a single synthetic approach, greatly expanding anion options without proportionally increasing process complexity
3Reliability
If toxic reagents are used in the synthesis process, then the production cost is reduced, but the product stability and suitability for lithium ion batteries deteriorates
Solution Approach 1:
The invention converts the potential harm of using simple reagents into a benefit by selecting carbonate esters and proton compounds that are non-toxic and environmentally friendly, yet produce ionic liquids with superior stability and electrochemical performance suitable for lithium ion battery applications
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 method produces high-purity ionic liquids with a wider range of anion options, improving the stability and performance of lithium ion secondary batteries by eliminating halide ion residues and using non-toxic, non-poisonous raw materials, thus addressing the limitations of existing synthesis techniques.
Implementation Method 1
a nitrogenous compound or a phosphorous compound, a proton compound and a carbonate ester are reacted with one another
Data Source
AI summary
The present invention relates to a preparation method of ionic liquids, particularly to a one-step reaction method used for synthesizing quaternary ammonium compounds or quaternary phosphonium compounds. In the method, a nitrogenous or phosphorous compound, a proton compound, and a carbonate ester are added into a reactor simultaneously to synthesize corresponding the quaternary ammonium ionic liquid or the quaternary phosphonium ionic liquid through said one-step reaction, i.e., ‘one-pot method’ reaction, during which three reactants are involved. The present invention also provides a lithium ion secondary battery comprising the ionic liquid prepared by above-mentioned preparation method. The ionic liquid preparation method of the present invention can widen the choice range of raw materials needed when preparing ionic liquids, and further widen the synthesized ionic liquid species.