Pure Hypochlorous Acid Preparation via Biphasic Extraction
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Solution Overview
Problem
Current methods for producing hypochlorous acid result in aqueous solutions containing impurities and salts, with no established method for producing pure, undiluted hypochlorous acid using nonpolar solvents.
Innovation Solution
Combining sodium hypochlorite with a nonpolar solvent and a weak acid to form a biphasic mixture, separating the organic phase, and removing the solvent with a dehydrating agent to obtain pure hypochlorous acid, which is then decanted and vacuum-aspirated to achieve a clear, stable liquid.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If aqueous solution methods are used to produce hypochlorous acid, then the production process is simple and easily manufacturable, but the resulting solution contains impurities and salts reducing purity
Solution Approach 1:
The patent extracts hypochlorous acid from the aqueous phase into an organic solvent phase, separating it from salts and impurities. This extraction process enables the removal of harmful components while retaining the target compound, thereby improving purity without complicating the overall manufacturing process.
Solution Approach 2:
An organic solvent acts as an intermediary medium to transfer hypochlorous acid from the aqueous phase to the organic phase. This intermediary enables selective transfer of the target compound while leaving impurities behind, achieving purification through a straightforward two-phase system.
2Manufacturing precision
If electrolytic methods are used to produce hypochlorous acid, then purity can be improved, but the device complexity and energy consumption increase
Solution Approach 1:
The patent replaces complex electrolytic systems with a simple chemical extraction process using organic solvents. Instead of using electrical energy and complex electrolysis equipment, the method uses a straightforward liquid-liquid extraction mechanism that achieves purification with minimal device complexity and lower energy requirements.
3Productivity
If strong acid is used to acidify sodium hypochlorite, then hypochlorous acid production is efficient, but chlorine gas production increases causing harmful effects
Solution Approach 1:
The patent changes the chemical parameter of the acid used from strong acid to weak acid. This parameter change modifies the reaction characteristics, allowing efficient hypochlorous acid production while suppressing the formation of harmful chlorine gas, thus resolving the contradiction between productivity and harmful effects.
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 produces pure hypochlorous acid as a clear, stable liquid with enhanced purity and solubility, allowing its use in various solvents and reducing the weight and volume of the acid by over 20 times compared to commercial bleach, facilitating its use as a reagent.
Implementation Method 1
combining a predetermined amount of sodium hypochlorite with a predetermined volume of a nonpolar solvent and a predetermined amount of a weak acid to form a biphasic mixture that includes an aqueous phase and an organic phase
Implementation Method 2
removing the nonpolar solvent is removed from the organic phase to obtain the pure hypochlorous acid
Implementation Method 3
The nonpolar solvent is removed from the organic phase to obtain the pure hypochlorous acid
Data Source
AI summary
A method for preparing pure hypochlorous acid includes a step of combining a predetermined amount of sodium hypochlorite with a predetermined volume of a nonpolar solvent and a predetermined amount of a weak acid to form a biphasic mixture that includes an aqueous phase and an organic phase. The biphasic mixture is agitated and then the organic phase is separated from the aqueous phase. The nonpolar solvent is removed from the organic phase to obtain the pure hypochlorous acid.