# US 6,293,975 B1 · Fuel composition > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 6,293,975 B1 - Document ID: US6293975B1 - Status: Granted - Kind: B1 - Application number: 09/124,689 - Filed: 1998-07-29 - Granted: 2001-09-25 - Earliest claimed: 1992-08-04 - Assignees: U.S. Filter Corporation - Inventors: Robert M. Scalliet; Raymond R. Ruth - Web page: https://patentgrep.com/patent/US6293975B1 ## CPC - C10L 1/324: {Dispersions containing coal, oil and water} - C10L: FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS ## 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. ## Claims ### Claim 1 A fuel composition, comprising: water; greater than about 35% by weight solids, said solids comprising inorganic solids and combustible organic solids that are insoluble in methylene chloride; and at least about 30% by weight of liquid hydrocarbons; the composition having a minimum heat value of at least about 7,000 BTU/lb and viscosity such that said composition is a pumpable fluid at ambient temperature, said solids and said liquid hydrocarbons being obtained from the same refinery waste stream containing liquid hydrocarbons, water and said solids whereby all of the heat value of the composition is derived from components initially present in said waste stream; with the proviso that no more than about ten percent by weight of water is present. ### Claim 2 (depends on 1) The composition of claim 1 wherein the composition has a minimum heat value of at least about 10,000 Btu/lb. ### Claim 3 A fuel composition, comprising: less than about 10% down to about 3% by weight water; greater than about 35% by weight solids, said solids comprising inorganic solids and combustible organic solids that are insoluble in methylene chloride; at least about about 30% by weight of liquid hydrocarbons; the composition having a minimum heat value of at least about 7,000 BTU/lb. and viscosity such that said composition is a pumpable fluid at ambient temperature, said solids and said liquid hydrocarbons being obtained from the same refinery waste stream containing liquid hydrocarbons, water and said solids whereby all of the heat value of said composition is derived from components initially present in said waste stream. ### Claim 4 (depends on 3) The composition of claim 3 wherein the composition has a minimum heat value of at least about 10,000 Btu/lb. ### Claim 5 A fuel composition derived from a waste stream, consisting essentially of: water; greater than about 35% by weight solids, said solids being obtained from a refinery waste stream containing liquid hydrocarbons, water and solids, such that at least about 12 percent by weight of the fuel composition comprises inorganic solids; and at least about 30% by weight of liquid hydrocarbons; the composition having a minimum heat value of at least about 7,000 BTU/lb. and having a viscosity wherein the composition is a pumpable fluid at ambient temperature; with the proviso that no more than about ten percent by weight of water is present. ### Claim 6 (depends on 5) The composition of claim 5 wherein a portion of the heat value of the composition is derived from the liquid hydrocarbons initially present in the same refinery waste stream as said solids and a portion of the heat value of the composition is derived from liquid hydrocarbons initially present in a waste stream of a different source. ### Claim 7 (depends on 5) The composition of claim 5 wherein said solids comprise from about 12 to about 30 percent by weight inorganic solids. ### Claim 8 (depends on 5) The composition of claim 5 wherein said solids in said fuel composition further include from about 12 to about 30 percent by weight non-methylene chloride extractable organic solids. ### Claim 9 (depends on 5) The composition of claim 5 wherein said solids in said fuel composition are substantially inorganic. ### Claim 10 (depends on 5) The composition of claim 5 wherein said solids in said fuel composition are derived from API separator sludge. ### Claim 11 (depends on 5) The composition of claim 5 wherein said solids in said fuel composition are derived from dissolved air floatation float. ### Claim 12 (depends on 5) The composition of claim 5 wherein said solids in said fuel composition are derived from slop oil emulsion solids. ### Claim 13 (depends on 5) The composition of claim 5 wherein said solids in said fuel composition are derived from tank bottoms. ### Claim 14 (depends on 5) The composition of claim 5 wherein said solids in said fuel composition are derived from heat exchanger bundle cleaning sludge. ### Claim 15 (depends on 5) The composition of claim 5 wherein the composition has a minimum heat value of at least about 10,000 Btu/lb. ### Claim 16 (depends on 5) The composition of claim 5 wherein the pumpable composition includes approximately 46% by weight solids. ### Claim 17 (depends on 5) The composition of claim 5 wherein the pumpable composition includes approximately 5% by weight water. ### Claim 18 (depends on 5) The composition of claim 5 wherein said liquid hydrocarbons are obtained from a waste stream that is different from the said refinery waste stream of said solids. ### Claim 19 A fuel composition derived from a waste stream, consisting essentially of: water; greater than about 35% by weight solids from the waste stream; and liquid hydrocarbons from a waste stream; the composition having a minimum heat value of at least about 7,000 BTU/lb. and a viscosity wherein said composition is pumpable at ambient temperature; with the proviso that no more than about ten percent by weight of water is present. ### Claim 20 (depends on 19) The fuel composition of claim 19 wherein the solids include inorganic solids. ### Claim 21 (depends on 19) The fuel composition of claim 19 wherein the liquid hydrocarbons are from a waste stream that is different from said waste stream that is the source of said solids.