Method for removing polychlorinated biphenyls from transformer o

Mineral oils: processes and products – Refining – Halogen contaminant removal

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585469, 570204, C10G 4502, C10G 1900, C10G 19073, C07C 126

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active

043774717

ABSTRACT:
A method is provided for effecting the removal of polychlorinated biphenyls from hydrocarbon oils, such as transformer oil, contaminated with more than 50 ppm of such polychlorinated biphenyls. There is utilized in the contaminated oil, while it is being agitated, dispersed metallic sodium, an aprotic ion-complexing solvent, for example, diglyme, and an oil-soluble electron carrier, such as naphthalene.

REFERENCES:
patent: 564683 (1958-10-01), Miller et al.
patent: 4284516 (1981-08-01), Parker et al.
PCB, The Franklin Institute News, vol. 44, No. 2, Jun./Jul. 1980.
Disclosure Letter--Destruction of Polychlorinated Biphenyls (PCB) In Mineral Oil, W. A. Fessler--Exhibit A.
Disclosure Letter--W. A. Fessler--Exhibit C.
Disclosure Letter--Treatment for PCB-Contaminated Transformer Oil, John F. Brown et al.--Exhibit B.
A complete Dechlorination of Polychlorinated Biphenyl by Sodium Naphthalene, Oku et al., Chemistry and Industry, 841, 1978.
Conversion of PCBs and Halogenated Pesticides into Non-Toxic Materials Using a New Type of Alkali Metal Reaction, Pytlewski et al., EPA Conference, Chicago, 3/18/80.
The Dechlorination of Polychlorinated Biphenyls by Alkaline Metals and Naphthalene, Oku et al., p. 1582, No. 11, 1978.
Chemical Abstracts, Sewage, Wastes, vol. 82, 1975, Treatment of Poly(chlorinated biphenyl) Wastes, Takase et al., 1974.
Goodyear Develops PCB Removal Method, C & EN, Sep. 1, 1980.
Preprint--University of Waterloo, Nov. 20, 1979--The Chemical Destruction of Polychlorinated Biphenyls by Sodium Naphthalenide, Smith et al.
Preprint--The Goodyear Tire & Rubber Company, A Safe, Efficient Chemical Disposal Method for Polychlorinated Biphenyls--"PCB's" Dane K. Parker.

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