Organic Garbage, Refuse Sewage, Or Waste Material Containing Or Treating (other Than Sulfite Waste Liquor) Patents (Class 106/697)
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Patent number: 5551976Abstract: A solidified waste is formed from a difficult-to-compact hydraulic cement slurry for use in the disposal of hazardous waste. The slurry contains inorganic non-compactible hydraulic cement particles, a concrete superplasticizer compound, water, and filler particles containing radionuclide and/or toxic contaminants. The slurry is then transferred to a storage vessel, such as a subterranean formation, to cast a stronger, denser solidified waste than a comparable solidified waste containing no superplasticizer.Type: GrantFiled: December 21, 1994Date of Patent: September 3, 1996Assignee: Union Oil Company of CaliforniaInventor: William C. Allen
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Patent number: 5547504Abstract: A non-shrink grout including Portland cement, sand and an additive which is a polymer incorporating at least one of a calcium compound and aluminum metal so as to be reactive with the cement. The grout when fresh expands during curing by gas formation and by hydration and expands when hardened. The grout is useful in construction.Type: GrantFiled: August 23, 1995Date of Patent: August 20, 1996Assignee: Board of Trustees operating Michigan State UniversityInventor: Parviz Soroushian
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Patent number: 5540771Abstract: A concrete product which uses 100% of the melt slags and pulverizes the melt slags into aggregates and fine powders, grinds the aggregates so that the percentage of absolute volume of the aggregates is over 60%, mixes the aggregates, fine powders, water and cement, and forms the mixture into the concrete product by vibration or press molding.Type: GrantFiled: July 24, 1995Date of Patent: July 30, 1996Assignees: Keihan Concrete Co., Osaka Gas Co., Ltd., Obayashi CorporationInventors: Minoru Hata, Takeshi Tsunemi, Tohru Okui
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Patent number: 5538552Abstract: In a process for the treatment of at least one mixture of solid and liquid waste substances which contains at least one metal such as Fe and/or compounds thereof, for example oxides, the mixture occurring in a condition in which it can be used at least only with difficulty, the mixture is at least extensively homogenized and mixed with at least one very fine-grain dry substance containing fly ash and/or coke. The resulting mixture is of such a nature, for example being at least predominantly in the form of agglomerates, that it can be fed to a thermal procedure, possibly after a grading operation.Type: GrantFiled: January 3, 1995Date of Patent: July 23, 1996Inventors: Dirk Osing, Gunter Ritter, Gunter Treutlein, Manfred Erken
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Patent number: 5538553Abstract: An organomineral construction paste comprises a mixture of a suspension of cellulose, lime and an aqueous solution of a sulfate and hydrogen peroxide. Airborne ash and hydraulic binders may also be added to impart additional moldable properties to the paste.Type: GrantFiled: December 18, 1995Date of Patent: July 23, 1996Inventor: Yves Burgand
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Patent number: 5534058Abstract: A structural product fabricated from waste materials and a method for making the product. The product includes fly ash, cellulose-based material and an adhesive binder. The product advantageously has good strength with light weight, can be sawed or hammered like wood and is substantially resistant to fire. The composition is particularly useful for forming structural products such as bricks, panels, roof shingles, studs and the like.Type: GrantFiled: January 27, 1995Date of Patent: July 9, 1996Assignee: Midway Environmental Associates, Inc.Inventor: William M. Strabala
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Patent number: 5525153Abstract: The present invention relates to a ready mixed cement product for home or commercial use which is premixed and prepackaged incorporating recycled construction and demolition debris in place of virgin stone. The present invention also relates to methods for making and using this ready mixed cement product.Type: GrantFiled: April 4, 1995Date of Patent: June 11, 1996Inventor: Michael Cosola
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Patent number: 5522928Abstract: A novel binder for interior plasters having a calcium sulphate component capable of binding in the presence of water and a finely divided residual material component comprised primarily of calcium sulphite, where the residual material is a product of flue gas desulphurization of coal-fired combustion plants.Type: GrantFiled: December 16, 1994Date of Patent: June 4, 1996Assignee: Sicowa Verfahrenstechnik fur Baustoffe GmbH & Co. KGInventors: Thomas Koslowski, Hans Roggendorf
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Patent number: 5505774Abstract: A continuous flow process for treating waste cellulosic fiber or paper mill sludge wherein calcium oxide, silica and water are blended with waste cellulosic fiber or paper mill sludge such that a pH is reached of between 10.5 and 12 to provide a treated mixture. The mixture is agitated such that it is dried and fluffed for use as an environmentally safe filler material.Type: GrantFiled: November 10, 1994Date of Patent: April 9, 1996Assignee: Cerad Industries, Inc.Inventor: Harold J. Manning
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Patent number: 5500044Abstract: A process for forming an ash aggregate is provided. The process involves mixing a cellulose sludge material with an ash component. The ash component may comprise fly ash or sanitary waste ash in combination with fly ash. The sludge component preferably comprises paper mill sludge or pulp mill sludge. The hard lightweight aggregate may be utilized in a variety of manners, for example, to provide lightweight concrete and lightweight concrete mixes.Type: GrantFiled: October 15, 1993Date of Patent: March 19, 1996Assignee: Greengrove CorporationInventors: William D. Meade, John W. Pearson
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Patent number: 5489333Abstract: An expansive Portland cement incorporating an expansive additive which is a polymer incorporating a calcium compound reactive with the cement is described. The shrinkage compensating concrete produced is much less likely to crack and is used in slabs and other structural systems where cracking of the concrete is a problem.Type: GrantFiled: March 9, 1995Date of Patent: February 6, 1996Assignee: Board of Trustees operating Michigan State UniversityInventors: Parviz Soroushian, Augustine C. Okwuegbu
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Patent number: 5482550Abstract: The present application is directed to a structural building unit formed from a set solid mixture consisting essentially of about 30% to about 75% by weight portland cement, about 1% to about 25% by weight percent ground expanded cellular polystyrene, about 1% to about 35% by weight ground cellulosic fiber, about 2% to about 15% by weight fly ash, about 1% to about 10% by weight silica fume, about 1% to about 15% by weight bentonite, about 25% to about 50% by weight water, about 0% to about 3% by weight air entrainer, about 0% to about 10% by weight paraffin wax emulsion and about 0% to about 15% by weight rubber emulsion.Type: GrantFiled: November 28, 1994Date of Patent: January 9, 1996Inventor: Mark C. Strait
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Patent number: 5478391Abstract: The cementitious material comprises an initial mixture of portland cement clinker and a modifier ranging in weight from approximately 0.5% to 5%, preferably 1%, of the weight of the clinker. The modifier is selected from a group comprising (a) a melamine formaldehyde-sodium bisulfite copolymer, and (b) sodium naphthalene sulfonate. The portland cement clinker and the modifier are intimately mixed and caused to react together in a solid state reaction by energetically grinding them together in a highly energetic ball-and-tube grinding mill to a high degree of fineness of at least approximately 5000 Blaine. Modified cementitious materials are produced by providing an additional constituent in the initial mixture comprising a hard, dense, substantially inert mineral material ranging up to 70% of the mixture by weight. The percentages of the portland cement clinker and the modifier are correspondingly reduced. The modified initial mixture is ground as before.Type: GrantFiled: March 26, 1993Date of Patent: December 26, 1995Assignee: Cement Technology CorporationInventors: Shahviran T. Babaev, Nikolay F. Bashlykov, Sergey A. Zubehin, Valery N. Serduk, Roman L. Serykh, Vicheslav R. Falikman, Boris E. Yudovetch, Vladimir P. Trambovetsky, Jaime Moreno, Claudio A. Eberhardt, Alfonso Cadaval
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Patent number: 5468291Abstract: A metal shredder residue-based landfill cover material composed of a mixture of moist substantially non-metallic residue of select maximum size and cementitious particles. The material can be formed by processes that efficiently remove large amounts of metal from metal waste items.Type: GrantFiled: March 26, 1993Date of Patent: November 21, 1995Assignees: Hugo Neu & Sons Inc., Proler International Corp.Inventors: Bruce P. Waterson, Dennis L. Caputo, William R. McLaughlin
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Patent number: 5425807Abstract: The present invention relates to a novel composition which is useful for forming construction blocks and encapsulating hazardous materials, a process for producing blocks and encapsulating the material, and blocks made of the material. This composition is a mixture of klin dust or volcanic fly ash and aggregate. The process comprises the steps of (a) blending a dry mixture comprising the kiln dust or volcanic fly ash mixture with water; (b) transferring the blended mixture into a compression zone and (c) compressing the blended mixture in the compression zone to form a brick of the desired size.Type: GrantFiled: July 14, 1994Date of Patent: June 20, 1995Assignee: TIDE CompanyInventor: Mitchell S. Riddle
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Patent number: 5405441Abstract: The present invention relates to a novel composition which is useful for forming construction blocks and encapsulating hazardous materials, a process for producing blocks and encapsulating the material, and blocks made of the material. This composition is a mixture of pozzoulanic fly ash and bottom ash. The weight ratio of fly ash:bottom ash is preferably in the range 80:20% by weight to 20:80% by weight. The process comprises the steps of (a) blending a dry mixture comprising the ash mixture with water; (b) transferring the blended mixture into a compression zone and (c) compressing the blended mixture in the compression zone to form a brick of the desired size.Type: GrantFiled: July 11, 1994Date of Patent: April 11, 1995Assignee: Tide CompanyInventor: Mitchell S. Riddle
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Patent number: 5377604Abstract: Disclosed is a method for obtaining stabilized molded materials from wastes, said method consisting of mixing the waste with a soldification agent and in extrusion molding the material obtained under vacuum and at constant temperature. The corresponding installation has a mixer connected to the molding device.Type: GrantFiled: July 26, 1993Date of Patent: January 3, 1995Inventor: Philippe Pichat
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Patent number: 5376283Abstract: A fixant for fixing toxic organic compounds comprised in waste material comprising an inorganic binder based on calcium compounds mixed with an alumino silicate, and at least one metal sulphate which fixes said organic compounds and counteracts leaching, is disclosed. Preferably a combination of several metal sulphates, especially aluminum sulphate, manganese sulphate and ferric sulphate is used. Moreover, the fixant preferably comprises an organo-clay compound, in particular a bentonite, a montmorillonite and a hectorite.A process of treating waste material comprising toxic organic compounds by mixing said waste material with said fixant, as well as a matrix formed from at least a set inorganic binder based on a cement and a silicate with environmentally harmful organic compounds containing waste material encapsulated therein, said matrix also comprising at least one metal sulphate which fixes said organic compounds and counteracts leaching is disclosed.Type: GrantFiled: October 25, 1991Date of Patent: December 27, 1994Assignee: Pelt & Hooykaas B.V.Inventor: Carel W. J. Hooykaas
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Patent number: 5374307Abstract: The present invention relates to a novel composition which is useful for forming construction blocks and encapsulating hazardous materials, a process for producing blocks and encapsulating the material, and blocks made of the material. This composition is a mixture of pozzoulanic fly ash and bottom ash. The weight ratio of fly ash:bottom ash is preferably in the range 80:20% by weight to 20:80% by weight. The process comprises the steps of (a) blending a dry mixture comprising the ash mixture with water; (b) transferring the blended mixture into a compression zone and (c) compressing the blended mixture in the compression zone to form a brick of the desired size.Type: GrantFiled: June 18, 1993Date of Patent: December 20, 1994Inventor: Mitchell S. Riddle
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Patent number: 5366548Abstract: The present invention relates to a novel composition which is useful for forming construction blocks and encapsulating hazardous materials, a process for producing blocks and encapsulating the material, and blocks made of the material. This composition is a mixture of kiln dust or volcanic fly ash and aggregate. The process comprises the steps of (a) blending a dry mixture comprising the kiln dust or volcanic fly ash mixture with water; (b) transferring the blended mixture into a compression zone and (c) compressing the blended mixture in the compression zone to form a brick of the desired size.Type: GrantFiled: April 17, 1992Date of Patent: November 22, 1994Inventor: Mitchell S. Riddle
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Patent number: 5362319Abstract: The invention provides a novel, environmentally stabilized formed product and to a method of producing a hard, dry, e.g., agglomerated or formed, environmentally stabilized product useful as a construction material, e.g., as pellets, panels, bricks, etc. comprising: a) ash such as RDF or coal ash (typically stack scrubber solids or bottom ash obtained from the burning of coal), b) an oxidizer and c) water. The amount of water present is selected to render the product plastic so that it can be molded to the desired shape. The oxidizer is provided in a sufficient amount to oxidize unstable compounds and to convert potassium, calcium or magnesium bisulfite to the sulfate form. Following the addition of the oxidizer, the admixture is exposed to electromagnetic energy, preferably ultraviolet light, to help drive the oxidation reaction to completion.Type: GrantFiled: October 21, 1993Date of Patent: November 8, 1994Inventor: William B. Johnson
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Patent number: 5346549Abstract: The invention provides a novel formed product and method of producing a hard, dry, e.g., agglomerated or formed, product useful as a construction material comprising: a) papermill sludge made up of paper fiber, clay and calcium carbonate, b) ash such as coal ash (typically stack scrubber solids obtained from the burning of coal), and c) water. The amount of water present is selected to render the product plastic so that it can be molded to the desired shape. An oxidizer is provided in a sufficient amount to oxidize unstable compounds and to convert potassium, calcium or magnesium bisulfite to the sulfate form. Following the addition of the oxidizer, the admixture is exposed to electromagnetic energy, preferably ultraviolet light, to help drive the oxidation reaction to completion. In an optional form of the invention, a minor amount of a cation exchange resin is added to the mixture to sequester heavy metals.Type: GrantFiled: October 23, 1992Date of Patent: September 13, 1994Inventor: William B. Johnson
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Patent number: 5342442Abstract: A method is shown for producing a lightweight aggregate by treating flyash and sewage sludge. The flyash and sewage sludge are mixed together and then agglomerated into pellets, with or without the use of a binder. The pellets may be coated and then are dried. The dried pellets are introduced into a rotary kiln in a direction that is co-current with the flow of fuel and air through the kiln. The pellets in the kiln will be indurated and will experience complete calcination as well as varying degrees of pyrolizing and sintering. The product of the kiln is a nodular material having a low density but with a hard and porous structure. The product of the kiln is feed to a cooler. The flyash sewage sludge mixture has a significant fuel value that is usable in the kiln. Furthermore, the fuel value available in the kiln off-gases may be used for drying the materials.Type: GrantFiled: February 2, 1993Date of Patent: August 30, 1994Assignee: Wisconsin Electric Power CompanyInventors: Timothy M. Nechvatal, Glenn A. Heian
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Patent number: 5340513Abstract: A method and composition for the preparation of calcium silicate bounded shaped articles comprising mixing SiO.sub.2 containing powder, unslaked or slaked lime, calcium hydroxide, with a waste paper pulper slurry containing cellulosic particle of less than 1.1 mm in length is described. Additionally, Portland cement, alumina cement, calcium sulfate anhydride, plaster of Paris, a foam, and a thermally activated accelerator may also be added to the mixture which is then shaped into blanks, and autoclaved.Type: GrantFiled: December 14, 1992Date of Patent: August 23, 1994Assignee: SICOWA Verfahrenstechnik fur Baustoffe GmbH & Co., KGInventors: Thomas Koslowski, Klaus-Michael Hessler, Olaf Musebrink
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Patent number: 5312858Abstract: A construction article manufactured from recycled waste materials is provided which efficiently utilizes a variety of ordinary refuse materials in providing a high-strength article. The article may be constructed of either ash as well as unburnt material filler and tack combined with a plastic binder, or alternatively metal, glass, paper and cloth may constitute the filler to be combined with the plastic binder. The plastic binder may be of a variety of polymers which may be melted to fuse the waste material together. The article is preferably provided with complimentary recesses and projections on opposite sides whereby similar articles may be combined to interlock with one another and bonded by the use of an organic solvent.Type: GrantFiled: June 21, 1993Date of Patent: May 17, 1994Inventor: Virgil Folsom
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Patent number: 5304709Abstract: A method of immobilizing a hazardous waste is provided. The method comprises providing a dry cementitious composition capable of hardening and in the form of finely divided particles of at least one cement binder, placing an amount of the dry cementitious composition into the hazardous waste with or without an additional added volume of water, without any type of physical mixing of the cementitious composition and water other than the mixing which occurs merely by applying the cementitious composition into the water. The major portion of the particles of the cementitious composition have approximately the same drop rate through the volume of water. The water contacts the dry cementitious composition when poured into the volume of water to hydrate the particles of the dry cementitious composition, the particles of cementitious composition dropping through the water to displace excess water and form the hydrated cementitious composition particles in a substantially non-segregated mass.Type: GrantFiled: February 28, 1991Date of Patent: April 19, 1994Assignee: Nomix CorporationInventors: H. Nash Babcock, Edward Holub
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Patent number: 5302331Abstract: A process for recycling household waste, garbage or trash into useful articles including in one preferred embodiment the steps of collecting the waste material, feeding the waste material into a pulverizer to convert the material to a powdery mass, adding water to the mass to form a slurry, adding a binder to the slurry to inhibit bacteriological growth, pouring or otherwise forming the slurry into a useful shape such as a block, or sheet, and allowing the formed shape to air dry under relatively low humidity. The resulting useful article may then be used as a building block, wall board, ceiling tile and so on. In an alternative example, the binder is added directly to the pulverized waste material to produce a useful article such as a flexible roof shingle.Type: GrantFiled: November 30, 1992Date of Patent: April 12, 1994Inventor: Robert E. Jenkins
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Patent number: 5286427Abstract: A method of environmental cleanup by producing an autoclaved aerated cement building material (termed AAC) by a process that uses the available silica sand and other raw materials in mine tailings, in particular copper mine tailings from porphyry copper mines. The process minimizes the need for processed silica sand and other raw materials, normally used in the production of the AAC building material. The lightweight AAC building material produced from the mine tailings has excellent thermal insulation properties, sound absorption and other desirable construction qualities comparable to AAC building material produced using processed silica sand, i.e. from non-mine tailings raw material sources.Type: GrantFiled: January 6, 1993Date of Patent: February 15, 1994Inventor: George Koumal
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Patent number: 5286430Abstract: Residue produced by incineration of commercial, industrial or municipal waste is treated to remove oversize material and ferrous materials. The moisture content of the untreated residue is adjusted, and the residue is mixed with Portland cement to partially aggregate the residue into a free-flowing, granular material containing no more than about five percent by weight fines and having a hydraulic conductivity of at least about 0.001 cm/sec after curing for 24 hours. The treated residue can be used to form a gas-venting layer for a landfill, and retains its good hydraulic conductivity as it cures into a cohesive mass, such that leaching of hazardous materials is reduced.Type: GrantFiled: May 1, 1992Date of Patent: February 15, 1994Assignee: Rolite, Inc.Inventors: James J. Downs, William A. Roberts
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Patent number: 5277826Abstract: This invention provides a process meeting the EPA's PFRP standard for WWTS treatment thereby producing a readily usable end-product in either soil-like form or semi-impermeable low load bearing, mass form. The process includes mixing WWTS with lime and fly ash, to cause a temperature increase to above 70.degree. C. for at least 30 minutes and to cause the pH to exceed 12 for at least 2 hours. The end-product may be compacted to produce an semi-impermeable, durable mass or the soil-like product may be used as landfill cover material.Type: GrantFiled: November 1, 1991Date of Patent: January 11, 1994Assignee: Browning Ferris IndustriesInventors: Howard Burns, Larry Gremminger
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Patent number: 5259697Abstract: A low-permeability barrier for waste disposal sites such as landfills and waste lagoons, and a method for constructing the same, includes a waste material. The waste material is stabilized to decrease the permeability characteristics of the waste material and may be further processed to improve the structural characteristics of the waste material and to prevent leaching of any leachable components. A method is provided for applying the waste material to the waste disposal site as a liner, interim cover, and/or final cover.Type: GrantFiled: March 26, 1990Date of Patent: November 9, 1993Assignee: Bethlehem Steel CorporationInventors: Robert B. Allen, Charles E. Jablonski, John D. Lynn, Thomas H. Weidner
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Patent number: 5256197Abstract: A process for the production of a water-insoluble, abrasion-resistant, synthetic solid article or aggregate, as well as the products produced thereby. Fly ash, lime, water and FGD sludge are mixed intimately and formed at pressures exceeding 1,000 psi, preferably 4000-8000 psi. The product is cured for at least the equivalent of 28 days at 73.degree. F., and crushed and sized to produce a commercial aggregate, for example, for concrete, asphalt, concrete masonry units, etc.Type: GrantFiled: June 19, 1991Date of Patent: October 26, 1993Assignee: Conversion Systems, Inc.Inventor: Charles L. Smith
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Patent number: 5246596Abstract: Disclosed is a method for processing waste to render it fit for ultimate disposal. The method comprises first contacting together in a reaction mixture the waste stream, an ammonia source capable of evolving ammonia for treating the waste, Ca(OH).sub.2, pozzolanic chemicals SiO.sub.2, Fe.sub.2 O.sub.3, and Al.sub.2 O.sub.3, and at least one pozzolanic accelerator selected from the group consisting of anionic metal silicates, anionic carbon compounds, anionic boron compounds (borate family), anionic phosphorous compounds (phosphate family), and gelling enhancers, in a manner suitable to cause pozzolanic stabilization reactions to occur thereby increasing the solids percentage of the reaction mixture. Next, the reaction mixture is allowed to reach a target temperature of at least about 90.degree. C., to reach a pH of at least about 11.5, and to evolve ammonia gas, thereby forming a heated mixture.Type: GrantFiled: September 4, 1992Date of Patent: September 21, 1993Inventors: Philip N. Baldwin, Jr., Norman K. Murray
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Patent number: 5234498Abstract: There is provided a method for the ecologically safe disposal of lead-contaminated hazardous industrial wastes (such, as for example, those generated as discardable by-products in primary and secondary lead smelting operations, especially, blast furnace slags and matte), which comprises reducing the size of the lead-contaminated industrial wastes and treating them, prior to encapsulation in a hardenable material, with the naturally occurring zeolite, clinoptilolite, in an amount sufficient to prevent lead ions (Pb.sup.+2) from leaching out of the industrial wastes, through exposure to the action of atmospheric agents (e.g., hot air and rain, or as a result of cyclical freezing and thawing in temperature climates), even over an extended period of time.Type: GrantFiled: September 8, 1992Date of Patent: August 10, 1993Assignee: GNB IncorporatedInventor: Paul R. Graves, Jr.
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Patent number: 5196061Abstract: A cementitious composite of delignified cellulosic debris and Portland cement is produced from waste sludge from a paper recycling process and combining the resultant material in particle sizes ranging from 0.06 to 25 mm with Portland cement.Type: GrantFiled: April 26, 1990Date of Patent: March 23, 1993Inventors: Robert C. Thomas, Craig O. Thomas
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Patent number: 5177305Abstract: The process is the type wherein the solid portions of waste materials of all origins are crushed and ground to a granulometry of under 5 mm and then are heated to between 750.degree. C. and 1,350.degree. C. According to the invention, after the addition, if applicable, of liquid waste to obtain a pasty mass, a reagent is added to the latter, in pulverulent form having granules of under 500 microns based with calcium carbonate, silicium oxide and, possibly, aluminum and iron oxides in quantities to produce the following ratio after incineration: ##EQU1## Application to the treatment of all types of waste by combustion.Type: GrantFiled: April 1, 1991Date of Patent: January 5, 1993Inventor: Philippe Pichat
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Patent number: 5166109Abstract: A low density aggregate product and method for making the same utilizing coal ash slag resulting from a typical coal gasification system wherein the resulting aggregate product has a lower density than the initial coal ash slag. The coal ash slag is combined with a small amount of a binder and then fired for a predetermined time and temperature to produce the aggregate. Also, by heating the coal ash slag and binder, a gaseous efflux is emitted to form interlaced channels throughout the aggregate which have a characteristic length and diameter.Type: GrantFiled: October 23, 1991Date of Patent: November 24, 1992Assignee: Electric Power Research InstituteInventors: Seymour B. Alpert, Donald Meisel, Vas Choudhry
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Patent number: 5143550Abstract: The method of disposal of hydrocarbon sludge (such as petroleum-derived sludge residue from a hydrocracker) comprises mixing the sludge with spent silica-alumina catalyst particulate fines, of particle size not exceeding 50 micrometers, so as to form friable aggregates of the particulate fines in which the individual particles are bound together by the sludge. The resulting formulation is useful, inter alia, for road-making.Type: GrantFiled: May 21, 1991Date of Patent: September 1, 1992Inventor: George A. Willacy
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Patent number: 5049285Abstract: The process for immobilizing a hazardous waste containing heavy metals comprises the steps of pretreating the waste by adding a sulfide to the hazardous waste so as to generate the sulfides of the heavy metals from the hazardous waste, mixing a chemical reagent with the pretreated waste, and blending the mixture of the chemical reagent and the pretreated waste with a pozzolanic material. The chemical reagent contains a mixture of a retarder and an accelerator. This process further comprises the step of mixing a neutralizing reagent with the hazardous waste so as to cause the hazardous waste to have a pH of between 5 and 14. The neutralizing reagent is an alkaline material, preferably lime, hydrated lime, or calcium hydroxide. The sulfide is either sodium hydrosulfide or sodium sulfide.Type: GrantFiled: September 14, 1989Date of Patent: September 17, 1991Assignee: Solidiwaste Technology, L.P.Inventors: Robin B. Somerville, Liang-tseng Fan
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Patent number: 4964914Abstract: A method is shown for disposing of hazardous waste material without utilizing landfill or bulk incineration. The hazardous waste material is first fed to a shredder for shredding the waste material to pieces of a range of predetermined sizes. The solid hazardous waste material is intermixed with an inlet stream of recycled flammable fuel. The shredded material and combined fuel is then transported by means of a screw conveyor to a dissolving tank, the dissolving tank being provided with a mechanical agitator for agitating the shredded material and combined fuel to produce a homogeneous, flammable mixture. The contents of the dissolving tank are passes to a storage tank once a homogeneous, flammable mixture is achieved.Type: GrantFiled: August 10, 1988Date of Patent: October 23, 1990Assignee: Chemical Reclamation Services, Inc.Inventor: E. L. "Buddy" Leath
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Patent number: 4931192Abstract: A method for disposing of non-polar organic wastes including the steps of dissolving the organic waste in an organic solvent which is not environmentally objectionable, in combination with a suitable surfactant, mixing the resultant solution with a quantity of water to develop an emulsion in which the organic element is effectively dispersed in the water and thereafter mixing the emulsion with cement which, when allowed to solidify, encapsulates the organic waste within the solid cementitious mass. This solid mass is suitable for disposal in a landfill or the like. This invention is useful in safely disposing of environmentally hazardous organic wastes.Type: GrantFiled: March 22, 1989Date of Patent: June 5, 1990Assignee: The University of Tennessee Research CorporationInventors: J. Stansill Covington, Michael A. McBride, Michael E. Hayes