Abstract: Apparatus and method steps are provided for accomplishing the pressurized filtration of a slurry mixture to separate a liquid solvent constituent from a particulate solids constituent having particles with varied particle average diameters. The apparatus makes use of a novel generally-helical array of stiff-wire brush bristles contained within, and retained in position by, the frictional engagement with the interior surface of a cooperating tube-like, open-ended array peripheral enclosure.

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.

Abstract: Substrates polluted with toxic substances are treated in-situ with solvated electrons prepared chemically or electrochemically. The process is useful in treating porous and nonporous substrates, such as earth, clay, sand, soils, concrete, asphalt, wood, brick, block and other masonry surfaces, including liquids such dielectric fluids contaminated with halogenated hydrocarbons without the usual separation procedures to provide substrates suitable for recycle having <1 ppm pollutant remaining.

Abstract: Ion exchange membrane divided electrochemical cells with a system of separated heterogeneous aqueous/nonaqueous electrolytes provide improved performance in both energy consuming and energy producing electrochemical processes by more effectively restricting the transmission of neutral molecules between cell compartments and by isolating reactions occuring at the working and counter electrodes.

Abstract: Substrates polluted with toxic substances are treated at their location of contamination, in-situ with solvated electrons prepared chemically or electrochemically. The process is useful in detoxifying inert, non-reducible solvents contaminated with chemically reducible substances.