Abstract: A method of centrifugal evaporation such as may be employed for reclaiming used industrial solvent having water and solid contaminants, including injecting the contaminated solvent into a cyclonic still, heating the contaminated solvent in the still to vaporize the solvent and water content, the solid contaminant being separated and discharged as a wet sludge, conducting the co-mingled solvent and water vapors to a condenser in which the vapors are condensed to liquids, separating the condensed liquids into solvent for reuse and water for disposal, passing the wet sludge into an inclined elongated dryer where the sludge is heated, vaporizing the liquid which is drawn off, the dried solid contaminant being collected for reuse or disposal.

Abstract: This disclosure is a method of converting oil and water containing sludge to dry waste in a plurality of steps as follows:1. Adding to the sludge a petrophylic material to absorb the oil and to separate out the water which is permitted to drain.2. Adding fibrous material for strength to bond the petrophylic material.3. Having drained the excess water from the sludge add hydrophylic material to absorb any of the water which may be intermixed.4. Sealing the external surface of the substantially dry material.

Abstract: An apparatus for separating entrained solids and particularly paramagnetic filing entrained in a liquid, including a vessel with a fluid inlet and outlet, a center tube supported within the vessel over the fluid outlet, a plurality of magnetic discs received in spaced orientation on the center tube and a plurality of paramagnetic discs, each paramagnetic disc being positioned between adjacent magnetic discs and a barrier filter tube positioned around the discs, the top and bottom of the tube being closed so that all fluid flowing into the vessel flows radially through the filter tube, the magnetic and paramagnetic discs causing the formation of radially extending flux lines throughout the filter tube so that iron filings collect and orient radially on the exterior of the filter tube.

Abstract: A cell having a catalytic layer for coalescing oil droplets dispersed in a water emulsion including an elongated perforated core in which the emulsion is injected, a layer of emulsion breaking fibrous material wound about the core through which the emulsion passes, and a catalytic layer of porous material wound about the layer of fibrous material, the catalytic layer being formed of a porous flexible substrate having sprayed on particles of molten metal.

Abstract: A cell for coalescing oil droplets dispersed in a water emulsion including a perforated core into which the emulsion is injected, a layer of emulsion breaking fibrous material wound about the core through which the emulsion passes, and a helical wire wrapping on the outside of said fibrous material. The wire wrapping is of selected tension and spacing.