{
    "title": "Chlorine Dioxide",
    "inventor_name": "Richard Hamilton, et al.",
    "publication_year": 2004,
    "device_name": "Controlled Gas Delivery Apparatus",
    "goal": "Provide on-site generation of high-purity chlorine dioxide gas with controlled rate and minimal toxic by-products for disinfection, deodorization, bleaching and sanitization.",
    "problem_addressed": "Existing chlorine dioxide generation methods produce toxic chlorates/chlorites, require large generators, and lack precise control of gas release.",
    "concept_summary": "The invention uses a multi-layered sachet/ membranevelope system containing reactants that generate chlorine dioxide when exposed to water (or water vapor). A proprietary membrane traps harmful by-products, releasing only pure ClO_2 gas. The design allows controlled rate, duration, and dosage of gas delivery for various applications.",
    "detailed_description": null,
    "category": "Chemistry & Chemical Processes",
    "principles": [
        "Chemical oxidation reaction producing chlorine dioxide",
        "Selective membrane trapping of toxic by-products",
        "Multi-layer sachet structure for controlled reactant exposure",
        "Water-vapor selective material to regulate initiation"
    ],
    "scientific_domains": [
        "Chemistry",
        "Chemical Engineering",
        "Materials Science",
        "Environmental Engineering"
    ],
    "mechanisms_of_action": [
        "Reactants (e.g., sodium chlorite + acid) react with water to generate ClO_2 gas",
        "Proprietary membrane allows ClO_2 to pass while retaining chlorates/chlorites",
        "Barrier layers and sachet geometry control diffusion rate and gas release"
    ],
    "materials": [
        "Hydrophobic membrane material",
        "Water-vapor selective material",
        "Sachet polymer (e.g., polyester)",
        "Reactants (unspecified, typical chlorine dioxide precursors)"
    ],
    "energy_sources": [
        "Water (as initiating agent)"
    ],
    "inputs": [
        "Water or water vapor",
        "Reactant chemicals (e.g., sodium chlorite, acid)"
    ],
    "outputs": [
        "Chlorine dioxide gas",
        "Purified chlorine dioxide solution (up to 99.9% purity)"
    ],
    "claimed_performance": "99.9% pure chlorine dioxide solution; odor elimination in confined spaces >6,000 ft^2 to >10,000 ft^2 per unit with a treatment period of at least 4 hours.",
    "experimental_evidence": "Fast-release products are reported to be widely used in laboratory and clinical settings; the CLO2BBERIZER odor eliminator is specified for spaces >6003 ft to 10003 ft per unit with a minimum 4-hour treatment period.",
    "replication_status": "Patented (US2004022676) - no independent replication reported.",
    "keywords": [
        "chlorine dioxide",
        "gas delivery",
        "on-site generation",
        "membrane",
        "sachet",
        "deodorization",
        "disinfection",
        "purity"
    ],
    "related_technologies": [
        "Gas generators",
        "Disinfectant sprays",
        "Odor control systems",
        "Bleaching agents"
    ],
    "controversy_level": "low",
    "confidence_score": 0.9,
    "practicability_score": 0.6,
    "fringe_score": 0.2,
    "evidence_strength": 0.3,
    "risk_score": 0.4,
    "trl_estimate": 5,
    "source_urls": [
        "http://www.selectivemicro.com",
        "http://www.selectivemicro.com/technology-overview/the-story-of-clo2",
        "http://clo2.com/readings/waste/corrosion.html",
        "http://www.dentallogic.com/dentist/effects.htm"
    ],
    "organizations": [
        "Selective Micro Patents",
        "SMT"
    ],
    "applications": [
        "Water disinfection",
        "Food processing sanitation",
        "Medical instrument sterilization",
        "Odor elimination in confined spaces",
        "Bleaching of flour, fats and textiles"
    ],
    "limitations": [
        "Requires safe handling of reactive chemicals",
        "Generation of chlorine dioxide must be on-site; not transportable as a concentrated gas",
        "Potential residues if membrane fails"
    ],
    "open_questions": [
        "Long-term stability of the proprietary membrane",
        "Scalability for large-volume industrial use",
        "Cost comparison with existing chlorine dioxide generators"
    ],
    "red_flags": [],
    "evidence_quotes": [
        "Today, through proprietary technology, you can have a 99.9% pure chlorine dioxide solution from SMT.",
        "The CLO2BBERIZER is an odor eliminator intended for deodorization in areas > 6003 ft to 10003 ft per unit. The deodorization treatment period is required no less than 4 hours.",
        "Fast release products are widely used in laboratory and clinical settings where there is a need for quick access to pure ClO2."
    ]
}