Non-metallized and subtoichiometric metallized reactions with am

Details Non-metallized and subtoichiometric metallized reactions with am Non-metallized and subtoichiometric metallized reactions with am

1994-03-07

1995-05-09

Straub, Gary P.

Hazardous or toxic waste destruction or containment

Containment

Solidification, vitrification, or cementation

588207, 570262, A63D 300

Patent

active

054142008

ABSTRACT:
Ozone depleting fluorocarbon compounds are dehalogenated through more economic reduction reaction with solvated electrons formed from lower equivalents of reactive metals than previously used by reacting the partial reduction products with non-aqueous liquid nitrogen-containing bases, such as ammonia, or alternatively, without any reactive metal by reacting with the base alone. Mixtures of fluorocarbon refrigerants including difficult to separate azeotropes of dichlorodifluoromethane contaminated with chlorodifluoromethane are reclaimed by treating only with weak non-aqueous nitrogen-containing bases to provide essentially chemically pure dichlorodifluoromethane refrigerant suitable for recycling/reuse.

REFERENCES:
patent: 2691052 (1954-10-01), Cines
patent: 3004075 (1961-10-01), Marcali
patent: 4436641 (1984-03-01), Stelz et al.
patent: 5110364 (1992-05-01), Mazur et al.
patent: 5307641 (1994-05-01), Kooy
Ralph C. Downing, Fluorocarbon Refrigerants Handbook, Prentice Hall, pp. 177, 182-189, 302-303, 306-308 (1988).

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