Process for gamma ray induced degradation of polychlorinated biphenyls
June 29, 2015. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesDehalogenation of halogenated compounds Polyelectrolyte hydrogels and methods of their preparation Method for disposal of chemical waste Process for removing undesirable substances from electrical devices Method for the solvent extraction of polychlorinated biphenyls Method and apparatus for solar destruction of toxic and hazardous materials Image-receiving element with crosslinked hydrophilic polymer containing processing composition Process for the decomposition and decontamination of organic substances and halogenated toxic materials Process for reducing the concentration of haloorganic compounds in water Process for treatment of organic contaminants in solid or liquid phase wastes InventorsAssigneeApplicationNo. 496385 filed on 06/29/1995US Classes:204/157.15, Processes of treating materials by wave energy204/157.6, Process or preparing desired organic product containing at least one atom other than carbon and hydrogen204/157.63Using ionizing radiationExaminersPrimary: Miller, Edward A.Attorney, Agent or FirmInternational ClassesA62D 003/00C07B 035/06 AbstractThe invention is a process for the in-situ destruction of polychlorinated biphenyl (PCB) compounds in transformer oils and transformers. These compounds are broken down selectively by irradiation of the object or mixture using spent nuclear fuel or any isotopic source of high energy gamma radiation. For example, the level of applied dose required to decompose 400 ppm of polychlorinated biphenyl in transformer oil to less than 50 ppm is 500 kilogray. Destruction of polychlorinated biphenyls to levels of less than 50 ppm renders the transformer oil or transformer non-PCB contaminated under current regulations. Therefore, this process can be used to treat PCB contaminated oil and equipment to minimize or eliminate the generation of PCB hazardous waste.Other References
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