Abstract: A composition for use as a fuel comprising: less than about 10% by weight water; greater than about 35% by weight solids and from about 30 to about 65% by weight of liquid hydrocarbons; the solids comprising inorganic solids and combustible organic solids that are insoluble in methylene chloride and the composition having a minimum heat value of at least about 7,000 BTU/lb. and a viscosity such that the composition is a pumpable fluid at ambient temperature. The solids and the liquid hydrocarbons are obtained from a single refinery waste stream containing liquid hydrocarbons, water and said solids so that all of the heat value of the composition is derived from components initially present in the waste stream.

Abstract: A fuel composition comprising less than about 10 percent-by-weight water, greater than about 30 percent-by-weight solids and from about 30 to about 70 percent-by-weight of a combustible nonaqueous, generally water insoluble liquid, the composition having a minimum heat value of at least 5000 BTU per pound and a viscosity such that said composition is pumpable at ambient temperature, the composition being conveniently derived, for example, from a waste stream containing a liquid, nonaqueous fraction, a solids fraction and an aqueous fraction, such as refinery waste, waste from aluminum smelting processes, paint waste or other industries.

Abstract: A method for recycling a waste stream containing water and solids comprises (a) removing water from the waste stream to produce a second stream containing less than 60% by weight water, (b) drying the second stream to produce a waste feed charge containing less than 15% by weight water, and (c) injecting the waste feed charge into a coker during the coking cycle. The water removal can be carried out in one or more steps, and can be carried out in a vertical disk centrifuge if it is also desired to reduce the particle size of the solids fraction. The waste feed charge can be injected into a delayed coker, flexicoker, or fluid coker, and allows the recycle of solid waste into the coke.

Abstract: A fuel composition comprising less than about 10 percent-by-weight water, greater than about 35 percent-by-weight solids and from about 30 to about 70 percent-by-weight of a combustible nonaqueous, generally water insoluble liquid, the composition having a minimum heat value of at least 7000 BTU per pound and a viscosity such that said composition is pumpable at ambient temperature, the composition being conveniently derived, for example, from a waste stream such as refinery sludge containing a liquid, nonaqueous fraction, a solids fraction and an aqueous fraction.

Abstract: A process for producing a fuel composition from a waste stream containing a liquid, organic component, water and a mixture of inorganic and organic solids wherein the waste stream is separated into an oil fraction, a water fraction and a solids fraction, the solids fraction being de-watered to produce a de-watered solids fraction containing less than about 60% by weight water, the de-watered solids fraction being admixed with oil and heated in a heating apparatus wherein the de-watered solids fraction and oil are subjected to heat exchange conditions at a temperature and for a time sufficient to evaporate water and produce a fuel composition containing less than about 15% by weight water, the apparatus having means for inducing forced convection condition in the mixture of de-watered solids and oil to prevent solids settling and enhance heat exchange heating.