Abstract: A waste sludge that contains water, oil and solids is subjected to filtration under vacuum or an applied inert gas pressure, preferably no more than 50 psia while utilizing a filter aid, to retain the maximum amount of oil in the filter cake. The filter cake is then dried at a relatively low temperature, slightly above the boiling point of water, to selectively remove water and produce a high heating value non-sticking solid. The product thus obtained in suitable for use as a solid fuel for a cement kiln or other combustion facilities. Depending on the amount of oil present in the original sludge, the applied pressure can be varied to retain different amounts of oil and to produce different heating values desired in the final solid fuel.

Abstract: A process for the removal of cyanides from contaminated oily solid waste performed by utilizing a single processing zone wherein multiple processing steps are carried out to remove contaminants. The steps include loading a contaminated oily solid waste into a zone where the solid is reduced in size, adjusting the pH of the oily solid waste, dewatering or deoiling the oily solid waste and drying the resulting solid, extracting the resulting dried solid with organic solvent, and further drying the extracted solid to remove residual moisture, cyanide, solvent, and volatile organics.

Abstract: A process for the removal of hydrocarbons from contaminated oily solids performed under atmospheric conditions by utilizing a single processing zone wherein multiple processing steps are carried out to remove contaminants. The steps include loading contaminated oily solids into a zone where the solids are reduced in size, dewatering or deoiling the oily solids, drying the resulting solids to remove moisture and volatile organics, extracting the resulting dried solid with organic solvent and further drying the extracted resulting dried solid to remove residual moisture, volatile organics and residual solvent, and fixing the metals.

Abstract: This invention is a process for removing NH.sub.3 from a NH.sub.3 -containing liquid stream. The process contains the following steps: (a) passing a NH.sub.

Abstract: Waste sludge that contains water, solids and oil, is mixed with a filter aid that has filter aid characteristics and a heating value of at least 1,000 Btu/lb. The admixture obtained is subjected to filtration yielding a high-Btu combustible material, useful as fuel. This combustible material, optionally after drying to remove water, is very suitable for use as fuel in a cement kiln.

Abstract: Gas mixtures containing a substantial amount of CO.sub.2 are treated to remove H.sub.2 S by using a selective solvent containing CO.sub.2, usually obtained by understripping loaded solvent during regeneration.

Abstract: HCN, and HCN along with COS may be removed from gaseous streams, particularly those derived from the gasification of coal, by contacting the gas stream with a catalyst consisting essentially of specified amounts of molybdenum oxide, or precursor or precursors thereof, and alumina.

Abstract: H.sub.2 S is removed from substantially supercritical CO.sub.2 by contact with a sorbent solution comprising (a) a tertiary amine; (b) particular physical co-sorbent; and (c) 3-10% w water.