Method for destroying halocarbon compositions using a...

Hazardous or toxic waste destruction or containment – Processes for making harmful chemical substances harmless,... – By reacting with chemical agents

Reexamination Certificate

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C588S406000

Reexamination Certificate

active

06984768

ABSTRACT:
A method for destroying halocarbons. Halocarbon materials are reacted in a dehalogenation process wherein they are combined with a solvent in the presence of a catalyst. A hydrogen-containing solvent is preferred which functions as both a solvating agent and hydrogen donor. To augment the hydrogen donation capacity of the solvent if needed (or when non-hydrogen-containing solvents are used), a supplemental hydrogen donor composition may be employed. In operation, at least one of the temperature and pressure of the solvent is maintained near, at, or above a critical level. For example, the solvent may be in (1) a supercritical state; (2) a state where one of the temperature or pressure thereof is at or above critical; or (3) a state where at least one of the temperature and pressure thereof is near-critical. This system provides numerous benefits including improved reaction rates, efficiency, and versatility.

REFERENCES:
patent: 4338199 (1982-07-01), Modell
patent: 4351978 (1982-09-01), Hatano et al.
patent: 4543190 (1985-09-01), Modell
patent: 4806514 (1989-02-01), Langford et al.
patent: 4931167 (1990-06-01), Wilwerding
patent: 4950833 (1990-08-01), Hawari et al.
patent: 5043054 (1991-08-01), Halpern et al.
patent: 5141629 (1992-08-01), Pri-Bar et al.
patent: 5174893 (1992-12-01), Halpern et al.
patent: 5185488 (1993-02-01), Hawari et al.
patent: 5369214 (1994-11-01), Farcasiu et al.
patent: 5490919 (1996-02-01), Pri-Bar et al.
patent: 5780669 (1998-07-01), Akiba et al.
patent: 5994604 (1999-11-01), Reagen et al.
patent: 6124519 (2000-09-01), Sako et al.
patent: 2-274269 (1990-11-01), None
patent: 11-263871 (1999-09-01), None
patent: 2001-79381 (2001-03-01), None
Sako et al., “Dechlorination of PCBs with Supercritical Water Hydrolysis”, Journal of Chemical Engineering of Japan, vol. 32, No. 6, pp. 830-832, published 1999.
Chemical Abstract accession No. 133:212402: “Dechlorination of 1-chlorooctadecane, 9,10-dichlorostearic acid and 12,14-dichlorodehydroabietic acid in supercritical carbon dioxide”, Aikawa et al., published 2000.
Akimoto et al., “Dechlorination of 1-Chlorohexadecane and 2-Chloronaphthalene in Water under Sub- and Supercritical Conditions”, Canadian Journal of Chemical Engineering, vol. 78, pp. 1151-1156, published Dec. 2000.
Anitescu et al., “Supercritical Water Oxidation Reaction Pathway and Kinetics of Polychlorinated Biphenyls”, Proceedings of the 2001 Conference on Environmental Research, Manhattan, KS, USA, May 21-24, 2001, Meeting Date 2001, pp. 40-51.
Aikawa et al., “Catalytic dechlorination of 1-chlorooctadecane in supercritical carbon dioxide”, Applied Catalysis B: Environmental, vol. 32, Issue 4, pp. 269-280, Aug. 30, 2001, available online Aug. 3, 2001.
Full Translation of JP 2-274269, published Nov. 1990.
Full Translation of JP 11-263871, published Sep. 1999.
Full Translation of JP 2001-79381, published Jun. 2001.
Aikawa et al., “Dechlorination of 1-chlorooctadecane, 9,10-dichlorostearic acid and 12,14-dichlorodehydroabietic acid in supercritical carbon dioxide”, EnviroAnalysis 2000, Proceedings of the Biennial Internat'l. Conf., Ottawa, May 8-11, 2000, pp. 435-440.
Berg, O., et al., “Column Chromatographic Separation of Polychlorinated Biphenyls from Chlorinated Hydrocarbon Pesticides, and their Subsequent Gas Chromatographic Quantitation in Terms of Derivatives”,Bulletin of Environmental Contamination&Toxicology, vol. 7(6), pp. 338-346 (1972).
Cooke, M., et al., “Analysis of Polychlorinated Naphthalenes, Polychlorinated Biphenyls and Polychlorinated Terphenyls via Carbon Skeleton Gas-Liquid Chromatography,”Journal of Chromatography, 156, pp. 293-299 (1978).
Cuppett, S., “Supercritical Fluid Cleaning”, document from Concurrent Technologies Corporation Web Site (www.dppr.ctc.com), pp. 1-6 (Dec. 1995).
Kabir, A., et al., “Dechlorination of pentachlorophenol in supercritical carbon dioxide with a zero-valent silver-iron bimetallic mixture”,Green Chemistry, vol. 3, pp. 47-51 (2001).
Wu, Q., et al., “Reductive dechlorination of polychlorinated biphenyl compounds in supercritical carbon dioxide”,Green Chemistry, vol. 2, pp. 127-132 (2000).
Anitescu, G., et al., “Solubility of individual polychlorinated biphenyl (PCB) congeners in supercritical fluids: CO , CO /MeOH and CO
-C.H.”,Journal of Supercritical Fluids, vol. 14, pp. 197-211 (1999).

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