Protective technology with reactive solid sorbent for oxidative decontamination of toxic materials
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Solution Overview
Problem
Current protective technologies are inadequate in effectively decontaminating a wide range of toxic chemicals and biological agents, as they either trap contaminants without neutralizing them or require costly activators and are not suitable for all forms (solid, liquid, aerosol, or vaporous) due to instability and form limitations.
Innovation Solution
A free-flowing solid particulate reactive sorbent made of hydrophilic nanoparticles with a detoxifying agent, such as hydrogen peroxide, stabilized by potassium stannate and phosphate, which absorbs and oxidizes toxic chemicals and biological agents, eliminating the need for additional activators and maintaining effectiveness in various forms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional filtration and sorbent materials are used to remove toxic chemicals, then physical trapping of contaminants is achieved, but the contaminants remain in their active state and can desorb over time
Solution Approach 1:
The patent converts the harmful toxic chemicals into beneficial harmless substances through oxidation reactions. The sorbent material containing hydrogen peroxide and catalyst transforms toxic chemicals like nerve agents and mustard gas into non-toxic products such as phosphonic acids and sulfoxides, eliminating the risk of re-emission while maintaining reliability
Solution Approach 2:
The patent employs hydrogen peroxide as a strong oxidant in combination with catalyst materials to accelerate the oxidation of toxic chemicals. This chemical oxidation process breaks down the toxic compounds rapidly and completely, ensuring they are neutralized rather than merely trapped, thus preventing desorption and re-emission
2Adaptability or versatility
If reactive filter media are used to decontaminate chemicals, then some toxic chemicals are neutralized, but the system is ineffective against biological agents and limited to a small subset of chemicals
Solution Approach 1:
The patent creates a universal sorbent material that can decontaminate multiple types of threats including chemical warfare agents, toxic industrial chemicals, pharmaceuticals, and biological agents. The combination of hydrogen peroxide, catalyst, and sorbent matrix provides broad-spectrum effectiveness across diverse contaminant types while maintaining high reliability through the robust oxidation mechanism
3Reliability
If peroxide-based decontamination systems are used, then effective oxidation of toxic agents is achieved, but activators are required that add production cost and degrade the oxidants over time
Solution Approach 1:
The patent implements a self-service system where the sorbent material contains embedded catalyst particles that automatically activate hydrogen peroxide upon contact with toxic chemicals. The catalyst materials such as metals or metal oxides embedded in the sorbent matrix provide spontaneous activation without requiring external activators, reducing production cost and eliminating premature oxidant degradation
Solution Approach 2:
The patent incorporates catalyst materials into the sorbent matrix during manufacturing, preparing the system in advance for immediate activation. The pre-integrated catalysts are positioned within the sorbent structure to ensure rapid activation of hydrogen peroxide when contaminants are encountered, eliminating the need for separate activator addition steps and reducing operational complexity
4Reliability
If gel or liquid peroxide systems are used for decontamination, then oxidation capability is provided, but the form is not conducive to absorbing target compounds in non-viscous, liquid or vaporous forms
Solution Approach 1:
The patent employs a porous sorbent matrix material with high surface area and appropriate pore structure that can absorb liquid and vaporous contaminants while containing hydrogen peroxide and catalyst. The porous structure allows vaporous and liquid target compounds to diffuse into the material and contact the oxidant-catalyst system, maintaining oxidation capability while improving ease of operation across different contaminant forms
Solution Approach 2:
The patent creates a composite material combining sorbent matrix, hydrogen peroxide, and catalyst components into a single integrated solid formulation. This composite structure maintains the oxidation capability of peroxide while adding the absorption properties of the sorbent matrix, enabling effective decontamination of chemicals in various forms including non-viscous liquids and vapors through a single material system
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 sorbent efficiently decontaminates chemical and biological agents by converting them into less hazardous forms, suitable for use in filtration systems, fabrics, and surfaces, with high absorption capacity and stability, reducing the risk of re-emission and corrosion.
Implementation Method 1
physisorption of these chemical and biological contaminants onto high surface area materials present in sorbent media
Implementation Method 2
oxidation of the vesicant mustard gas (HD) to the corresponding sulfoxide (HDO) which is a non-vesicant and the perhydrolysis of nerve agents such as VX and GD to their non-toxic phosphonic acid forms
Data Source
AI summary
A solid particulate reactive sorbent for decontaminating toxic chemical and biological agents and its method of making. The reactive sorbent comprising a plurality of aggregates formed from linked hydrophilic nanoparticles and individual nanoparticles that bind at least one detoxifier, such that the sorbent absorbs the agents, allowing the detoxifier to oxidize and decontaminate the agents for removal. More preferably, the hydrophilic nanoparticles comprise fumed silica and the detoxifier comprises hydrogen peroxide.