Method for destroying halocarbon compositions using a critical solvent
View Patent ↗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.
1. A method for dehalogenating a halocarbon comprising:
providing a supply of a halocarbon; and
combining said halocarbon with a solvent which is comprised of a material selected from the group consisting of carbon monoxide, xenon, nitrogen dioxide, nitrous oxide, nitric oxide, carbon disulfide, and mixtures thereof and a hydrogen donor composition in the presence of a catalyst in order to cause a reaction which generates a dehalogenated product from said halocarbon, said solvent being maintained at a supercritical state during said reaction.
2. The method of claim 1 wherein said solvent has a critical temperature (T c ) and a critical pressure (P c ), said solvent being maintained during said reaction at a temperature (T)=about (T c ) to [(2)(T c )] and a pressure (P)=about (P c ) to [(50)(P c )].