Tertiary Amine Resin Purification of Fluorinated Ionic Compounds
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Solution Overview
Problem
Fuel cells and water electrolyzers using fluorinated polymers with ion exchange groups discharge compounds containing aliphatic hydrocarbon groups due to chemical deterioration, requiring effective removal methods for these compounds, especially those with ionic groups and fluorine atoms, which existing resins like those with quaternary ammonium salt groups are inadequate in addressing.
Innovation Solution
A method involving a treatment target solution containing compounds with aliphatic hydrocarbon groups, HF, H2SO4, and water being brought into contact with a resin having tertiary amino groups to remove these compounds, specifically using a resin with a tertiary amino group structure that improves anion exchange ability by lowering pH and forming ion pairs, thereby efficiently removing compounds with aliphatic hydrocarbon groups and fluorine atoms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If existing resin technologies are used, then simple purification is achieved, but purification efficiency for fluorine-containing compounds with ionic groups is insufficient
Solution Approach 1:
The invention changes the chemical property parameter of the resin by introducing tertiary amino groups with specific basicity. These groups can form ion pairs with fluorine-containing compounds having ionic groups, significantly improving purification efficiency while maintaining system simplicity through a single-resin approach.
2Ease of operation
If the concentration of compounds having an aliphatic hydrocarbon group is not sufficiently reduced, then treatment simplicity is maintained, but purification precision is insufficient
Solution Approach 1:
The invention changes the functional group parameter to tertiary amino groups, which have high affinity for compounds with aliphatic hydrocarbon groups. This enables the resin to reduce compound concentrations to 100 ppt or below, achieving high purification precision while maintaining operational simplicity through a single-step treatment 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
This method effectively reduces the concentration of aliphatic hydrocarbon compounds with ionic groups and fluorine atoms to 100 ppt or below, enhancing the purification efficiency and addressing the limitations of previous resin technologies.
Implementation Method 1
a resin having a tertiary amino group to remove the compound having an aliphatic hydrocarbon group from the treatment target solution
Implementation Method 2
improves anion exchange ability by lowering pH and forming ion pairs
Data Source
AI summary
A method for purifying a treatment target solution which can remove a compound having an aliphatic hydrocarbon group which has at least one ionic group and a fluorine atom efficiently is provided.The method for purifying a treatment target solution of the present invention comprises bringing a treatment target solution containing a compound having an aliphatic hydrocarbon group which has at least one ionic group selected from the group consisting of a carboxylic acid group and a sulfonic acid group, and a fluorine atom and may contain an oxygen atom, at least one acid selected from the group consisting of HF and H2SO4 and water, into contact with a resin having a tertiary amino group to remove the compound having an aliphatic hydrocarbon group from the treatment target solution.