Method for removing polychlorinated dibenzodioxins and polychlor

Liquid purification or separation – Processes – Chemical treatment

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210909, 210928, C02F 1108

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active

050750178

ABSTRACT:
A process for removing PCDD's and PCDF's from paper mill sludge is provided. The process comprises combining the sludge with an oxidant and then oxidizing the sludge under supercritical or near supercritical conditions to destroy the PCDD's and PCDF's. Using this process, destruction efficiencies of greater than 98% have been achieved for 2,3,7,8-TCDD, which is reportedly the most toxic of the dioxins.

REFERENCES:
patent: 3876497 (1975-04-01), Hoffman
patent: 4061566 (1977-12-01), Modell
patent: 4113446 (1978-09-01), Modell et al.
patent: 4147624 (1979-04-01), Modell
patent: 4263253 (1981-04-01), Pilz et al.
patent: 4308200 (1981-12-01), Fremont
patent: 4338199 (1982-07-01), Modell
patent: 4466923 (1984-08-01), Friedrich
patent: 4472442 (1984-09-01), Katz
patent: 4493797 (1985-01-01), Avedesian
patent: 4495095 (1985-01-01), Lawson et al.
patent: 4543190 (1985-09-01), Modell
patent: 4550198 (1985-10-01), Myerson
patent: 4554170 (1985-11-01), Panzner et al.
patent: 4564458 (1986-01-01), Burleson
patent: 4594164 (1986-06-01), Titmas
patent: 4647466 (1987-03-01), Japikse et al.
patent: 4675198 (1987-06-01), Sevenants
patent: 4703060 (1987-10-01), Traitler et al.
patent: 4728525 (1988-03-01), Toro et al.
patent: 4767634 (1988-08-01), Kaleda et al.
patent: 4964995 (1990-10-01), Chum et al.
patent: 5009745 (1991-04-01), Hossain
"Incineration Disposal Methods", M. P. Esposito, T. O. Tiernan and F. E. Dryden, Dioxins, pp. 258-259, Nov. 1980.
"Destruction of Dioxin-Containing Wastes in a Mobile Incineration System", R. D. Kleopfer et al., Chlorinated Dioxins and Dibenzofurans in Perspective, Chapter 34, pp. 511-518.
"Levels of Chlorinated Organics in a Municipal Incinerator", R. R. E. Clement et al., Chlorinated Dioxins and Dibenzofurans in The Total Environment II, Chapter 34, pp. 489-514.
"Production of Chlorinated Aromatics in the Post-Combustion Zone and Soiler", T. Oberg et al., Chemosphere, vol. 19, Nos. 1-6, pp. 317-322, 1989.
Botre et al., Environmental Science and Technol., vol. 12, No. 3, Mar. 1978, pp. 335-336.
Brady et al., "Supercritical Extraction of Toxic Organics from Soils", Ind. Eng. Chem. Res., 1987, vol. 26, pp. 261-268.
Crosby et al., Environmental Health Perspectives, Sept. 1973, pp. 259-266.
Crosby et al., Science, vol. 173, Aug. 20, 1971, pp. 173-174.
Dooley et al., EPA Report No. 600/9-87/018F, pp. 383-397.
Dulin et al., Environ. Sci. Technol., vol. 20, No. 1, 1986, pp. 72-77.
Eckert et al., Environ. Sci. Technol., 1986, vol. 20, pp. 319-325.
Exner et al., Chlorinated Dioxins and Dibenzofurans in the Total Environment II, Keith et al. eds, Butterworth, 1985, pp. 48-49.
Groves et al., CRC Critical Reviews in Environmental Control, 1985, vol. 15, pp. 237-274.
Hatakeda et al., Nipon Kagaku Kaishi, 1987, No. 5, pp. 931-933.
Hawthorne et al., J. Chromatogr., 1987, vol. 403, pp. 63-76.
Hawthorne et al., Anal. Chem., 1987, vol. 59, pp. 1705-1708.
Li et al., Ind. Eng. Chem. Res., 1988, vol. 27, pp. 1301-1312.
Modell, M., Fundam. Thermochem. Biomass Convers., 1985, pp. 95-119.
Ottoboni, A., The Dose Makes the Poison, Vincente Books, Berkeley, Ca., 1984.
Pang et al., Ind. Eng. Chem. Process. Des. Dev., 1985, vol. 24, pp. 1027-1032.
Plimmer, J. R., Bull. Environm. Contam. Toxicol., vol. 20, 1978, pp. 87-92.
Podoll et al., Environ. Sci. Technol., vol. 20, No. 5, 1986, pp. 490-492.
Rappe et al., Chlorinated Dioxins and Dibenzofurans in the Total Environment II, Keith et al. eds., Butterworth, 1985, pp. 125-126.
Ritter and Campbell, Biotechnology and Bioengineering Symp., 1986, No. 17, pp. 179-182.
Schneiderman et al., J. Chromatogr., 1987, vol. 409, pp. 343-353.
Shishikura et al., J. Jpn. Oil Chem. Soc., 1988, vol. 37, pp. 8-12.
Srinivasan et al., Chlorinated Dioxins and Dibenzofurans in Perspective, Rappe et al. eds., Lewis Publishers, Inc., 1986, pp. 531-537.
West et al., Can. J. Chem. Eng., 1987, vol. 65, pp. 645-650.
Chemosphere--Chlorinated Dioxins and Related Compounds 1987, McNelis et al. eds., Pergamon Press, New York, vol. 18, Nos. 1-6, 1989, p. 50.
Dioxins, NTIS Report No. PB82-136847, Industrial Environmental Research Laboratory, Cincinnati, Oh., Nov. 1980, Section 6.
Suprex Publication No. TN-022, Suprex Corporation, Pittsburgh, Pa., 1989.

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