Electrochemical System for Aqueous Oxidizing Agent Synthesis
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Solution Overview
Problem
Conventional electrochemical systems for producing hypochlorous and hydroperoxide oxidizing agents from sodium chloride solutions face issues with the decomposition of these agents due to multivalent metal ions, requiring frequent maintenance and the use of additional reagents, and result in reduced bioactivity over time.
Innovation Solution
A filter is placed upstream of the water entry point to mix fresh water with gaseous oxidizing agents, and a metered introduction of catholyte from the cathode circuit is used, along with a filter in the salt solution feed line to the anode compartment, reducing the presence of hardness-forming substances and multivalent metal ions, thereby extending the bioactivity of the oxidizing agents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional purification methods are used for sodium chloride solutions, then the production process is simple, but multivalent metal ions remain in the solution causing decomposition of oxidizing agents
Solution Approach 1:
The patent applies preliminary action by introducing catholyte into the salt solution before electrolysis to precipitate multivalent metal ions as hydroxides. This pre-treatment removes harmful impurities that would otherwise decompose the oxidizing agents during electrolysis, extending their stability without requiring complex post-treatment systems.
Solution Approach 2:
The patent uses catholyte as an intermediary substance to transfer hydroxide ions to the salt solution, enabling the precipitation of multivalent metal ions. This mediator approach allows for effective purification while maintaining system simplicity, as the catholyte is already produced in the electrolysis process and can be recirculated.
2Reliability
If additional reagents are introduced for purification and pH correction, then the purity of oxidizing agents improves, but maintenance requirements and operational complexity increase
Solution Approach 1:
The patent implements self-service by using the catholyte produced during electrolysis to purify the salt solution. The system uses its own byproduct (catholyte containing hydroxide ions) to precipitate multivalent metal ions, eliminating the need for external purification reagents and reducing maintenance requirements while maintaining high purity oxidizing agents.
Solution Approach 2:
The patent merges the purification function with the electrolysis process itself. By introducing catholyte into the salt solution before electrolysis, the system combines impurity removal with oxidizing agent production in a single integrated process, simplifying operation while ensuring purity.
3Duration of action of moving object
If frequent maintenance and reagent addition are performed, then the bioactivity of oxidizing agents is maintained, but time and resource consumption increase
Solution Approach 1:
The patent applies preliminary action by removing multivalent metal ions through catholyte treatment before electrolysis begins. This pre-removal of decomposition catalysts ensures that oxidizing agents maintain their bioactivity for extended periods without requiring frequent maintenance or reagent addition, significantly reducing time loss while preserving effectiveness.
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 configuration significantly extends the retention of biocidal properties of the oxidizing agent solution and reduces the need for maintenance by continuously purifying the water and salt solution, avoiding the consumption of additional chemical reagents and maintaining the oxidizing agents' effectiveness for a longer period.
Implementation Method 1
A filter is placed upstream of the water entry point to mix fresh water with gaseous oxidizing agents
Implementation Method 2
purifying it from hardness-forming substances and multivalent metals by converting the soluble compounds into insoluble hydroxides by the metered introduction of catholyte into the salt solution
Implementation Method 3
electrolyzing aqueous alkali metal chloride solutions to obtain chlorine, chlorine compounds, oxygen, ozone as well as hydroperoxide compounds
Implementation Method 4
a device for dissolving the moist gaseous products of the electrochemical anode reactions in the water stream to obtain the oxidizing agent solution
Data Source
AI summary
The invention relates to the field of chemical technology and relates in particular to devices for electrolyzing aqueous alkali metal chloride solutions to obtain chlorine, chlorine compounds, oxygen, ozone as well as hydroperoxide compounds and can be used for disinfection in the medical, pharmaceutical and food industries as well as in the purification and sterilization of water by aqueous solutions of hypochlorous and hydroperoxide oxidizing agents.