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Class 588/256 - Waste contains heavy metal (e.g., fly, ash, flue dust, and incinerator ash)


Subclass of Class 588 - Hazardous or toxic waste destruction or containment
Definition: Processes wherein hazardous or toxic waste contains heavy
No. of patents: 340
Last issue date: 05/10/2011


1                  
NumberTitleIssue Date
7938766Calcium-sodium polysulfide chemical reagent and production methods
A calcium-sodium polysulfide chemical reagent and methods for producing the reagent. The reagent is a blend of calcium polysulfide and sodium polysulfide that can be prepared using various types, sources and ratios of lime, elemental sulfur and sulfide ion using eit...
05/10/2011
7736291Method for stabilization of heavy metals and odor control with dicalcium phosphate dihydrate powder
This invention provides a method for stabilization and treatment of heavy metal bearing materials and wastes subject to acid leaching tests or leach conditions and odor limits by addition of acid semi-soluble pulverized or fine particle DiCalcium Phosphate DiHydrate...
06/15/2010
7670277Composition and method for the solidification of toxic or hazardous drilling and agricultural waste
A method of solidifying toxic or hazardous liquid waste, including the steps of pumping an aqueous waste, e.g., from a drilling fluid holding area; through a shearing device; adding the layered phyllosilicate to said aqueous waste in an amount sufficient to solidify...
03/02/2010
7585270Treatment of hazardous waste material
A method of incorporating a material in a settable binder is disclosed. The binder includes a source of caustic magnesium oxide. The method involves mixing the material with the binder, either as part of a slurry or for subsequent formation into a slurry, and then a...
09/08/2009
7530939Method for stabilization of heavy metals in incinerator bottom ash and odor control with dicalcium phosphate dihydrate powder
This invention provides a method for stabilization and treatment of heavy metal bearing materials and wastes subject to acid leaching tests or leach conditions and odor limits by addition of acid semi-soluble DiCalcium Phosphate DiHydrate such that the leaching pote...
05/12/2009
7402132Treating hazardous materials
Methods of treating hazardous materials, such as, for example, contaminated soils, are disclosed. In one aspect, a method may include treating a contaminated soil with a hazardous material treatment composition to form a resulting material. In one aspect, the hazard...
07/22/2008
7399268Method for treatment of arsenic-contaminated soil
Disclosed herein is a method for treatment of arsenic-contaminated soil, said method being capable of insolubilizing arsenic compounds (in organic form or tri- or pentavalent inorganic form), thereby reducing their leaching level below the environmental standard val...
07/15/2008
7381177Flowable fill and flowable fill method for disposal of recovered waste
An improved flowable fill material and method for producing same that provides a medium for disposal of waste wood or other reclaimed debris, including wood treated with anti-microbial and/or anti-fungal materials including those containing copper, chromium and arse...
06/03/2008
7374367Methods for stabilizing heavy metal containing material for disposal in saturated zone
A leaching-stabilized heavy metal-contaminated matrix can be stored in a subsurface saturated zone by contacting the matrix with an amount of an agent for increasing acid-neutralization capacity sufficient to provide the stored matrix a preselected permanence level....
05/20/2008
7361283Extraction and treatment of heavy metals
Contaminated waste streams or soil or sludge is subjected to a first treatment stage with an acid liquor at a pH below 2 and at a solids content from 5 to 30%; then the liquid and solid phases from the first treatment stage are separated; the solids from the first t...
04/22/2008
7351191Method for stabilizing contaminated waste
A method for solidifying an oil-contaminated aqueous waste in situ or ex situ includes the step of combining the oil-contaminated waste with a clay, a cement and a sulfite salt solidification agent to form a solidified waste matrix, wherein the solidification agent ...
04/01/2008
7344489Sludge treatment method
Process for the treatment of a sludge containing heavy metals and organic matter according to which foaming of the sludge is brought about and it is dried. ...
03/18/2008
7338429Method for direct solidification and stabilization of liquid hazardous wastes containing up to 100,000 mg/L of arsenic
The present invention relates to a method for direct treatment of liquid wastes containing up to 10% or 100,000 mg/L of arsenic by solidification/stabilization in a relatively cost effective and environmentally safe. The method also permits the simultaneous utilizat...
03/04/2008
7326346High capacity regenerable sorbent for removal of arsenic and other toxic ions from drinking water
The present invention is directed to a sorbent comprising a disordered polyvalent metal oxide on the surface of an inert substrate. The substrate can be a layered silicate, such as vermiculite, an aluminosilicate such as montmorillonite, or a nonlayered silicate suc...
02/05/2008
7323429Clay composition
A method for pacifying the spent bed material resulting from the synthesis of organohalosilanes and halosilanes by mixing clay with spent bed material. Clay compositions containing at least 10 weight % of clay and spent bed material, as well as ceramic compositions ...
01/29/2008
7314512Treatment of surfaces to stabilize heavy metals
A reactive coating composition and method for treating a surface including heavy metals by applying the reactive coating composition to the surface. The surface can be, for example, a paint layer containing heavy metals. The reactive coating composition includes a s...
01/01/2008
7302897MSW disposal process and apparatus using gasification
A system for disposing of municipal solid waste provides commercially-available equipment that is modified to initially remove identifiable unwanted components from the waste, and then chop the waste into small pieces of a size suitable for handling, separation and ...
12/04/2007
7264734Method for treating dredged material
The present invention provides a method for treating dredged material in which liquid is first added to the dredged material, and dewatering the dredged material to obtain a filtrate and a solid portion. Contaminants are removed from the dredged material by at least...
09/04/2007
7255514Method and system for removing contaminants from soil
A method and system for removing contaminants from contaminated soil at a site utilizes particle size segregation and particle density segregation to yield a plurality of fractions, whereby each of the fractions are tested and identified for the presence of unaccept...
08/14/2007
7232407Method for inerting mineral residues
Method of inerting mineral residues comprising automobile grinding residues, in which method water is added to the mineral residues so as to form a paste, the paste is mixed with phosphoric acid, and the resulting mixture is calcined. ...
06/19/2007
7232483Cement composition having chromium reducer
Exemplary compositions and methods for reducing hexavalent chromium in cementitious compositions involve the use of a liquid additive composition, comprising stannous chloride. Along with the stannous chloride may be used at least one co-additive comprising an antio...
06/19/2007
7217401Mercury removal from activated carbon and/or fly ash
A method for reducing the amount of mercury affixed to a sorbent and/or fly ash is disclosed. The method includes the steps of providing an amount of sorbent and/or fly ash wherein at least a portion of the amount of sorbent and/or fly ash has particulates having me...
05/15/2007
7214254Method of removing mercury from mercury contaminated materials
A method of reducing mercury levels in a mercury contaminated material using microwave energy. The method comprises the steps of (a) placing the mercury contaminated material in a microwave reactor; (b) providing a stream of gas in the microwave reactor, the stream ...
05/08/2007
7183235High capacity regenerable sorbent for removing arsenic and other toxic ions from drinking water
The present invention is directed to a sorbent comprising a disordered polyvalent metal oxide on the surface of an inert substrate. The substrate can be a layered silicate, such as vermiculite, an aluminosilicate such as montmorillonite, or a nonlayered silicate suc...
02/27/2007
7183453Method for treating infectious waste matter
A system and method is provided for producing a safely disposable end product from waste matter containing undesirable materials, such as infectious, biohazardous, hazardous, or radioactive elements. The method comprises the steps of providing a highly basic solvent...
02/27/2007
7157010Polymeric flocculant infused silt fence
A polymeric flocculant infused silt fence assembly comprising two opposing and attached geo-textile sheets, each adapted to filter entrained non-colloidal particles and together encasing a layer of polymeric flocculant material. In a preferred embodiment the polymer...
01/02/2007
7132584Method of using high temperature plasma to disintegrate waste containing titanyl phthalocyanine
A method of using high temperature plasma to disintegrate waste containing titanyl phthalocyanine (TiOPc) comprises heating a mixture of titanyl phthalocyanine (TiOPc), a vitrifying material and optionally selected waste soil to a temperature of 1,220° C. to 10,000...
11/07/2006
7128780Process for producing building materials from raw paint sludge
A process for producing building materials, such as asphalt, cement, concrete, mortar, or plaster board from liquid paint sludge containing water and paint solids produced from overspray in commercial paint booth operations. The preferred embodiment comprises adding...
10/31/2006
7128782Sulfate dispersion chromate reducer
A chromium VI reducing composition comprising particles of solid material selected from the group consisting of iron (II) sulfate and tin sulfate, the particles being substantially uniformly dispersed within a liquid carrier. Methods for modifying hydratable cementi...
10/31/2006
7121995Method for stabilization of lead smelter slag and matte
This invention provides a method for stabilization of lead smelter slag and matte subject to acid and water leaching tests or leach conditions by addition of stabilizing agents into the smelter feed such that leaching of lead is inhibited to desired levels. The resu...
10/17/2006
7109366Compositions for removing metal ions from aqueous process solutions and methods of use thereof
The present invention provides a composition and process using the composition for removing metal ions from aqueous process solutions. These compositions include a non-metallic compound and a suitable carrier. In one embodiment, the non-metallic compound is a thiura...
09/19/2006
7087110Liquid additive for intergrinding cement
Exemplary compositions and methods for reducing hexavalent chromium in cementitious compositions involve the use of a liquid additive composition, comprising stannous chloride. Along with the stannous chloride may be used at least one co-additive comprising an antio...
08/08/2006
7074174Methods and apparatus for encapsulating hazardous debris
A method of collecting, treating, transporting and disposing of hazardous debris which combines the standards of macroencapsulation and microencapsulation and involves the use of a liner to contain hazardous debris together with reagents that reduce leachability of ...
07/11/2006
7059805Process for environmental pacification of drill cuttings
The process for environmental pacification of drill cuttings which contain drilling fluid residue is characterized by mixing said cuttings with dehydrated limestone coke ash in the presence of water. Upon mixing the drilling fluid residue becomes entrapped into a no...
06/13/2006
7048781Chemically-impregnated silicate agents for mercury control
The present invention is directed to a contaminant removal agent comprising a polyvalent metal sulfide on the surface of an inert substrate. The substrate can be a layered silicate, such as vermiculite, an aluminosilicate such as montmorillonite, or a nonlayered sil...
05/23/2006
7033507Method for removing metals from acid mine drainage
A method for removing metal contaminants from acidic mine wastewater using lignin derivatives, such as lignosulfonates and kraft lignin, an alkali coagulant, such as a lime compound, and an alkaline composition for increasing the pH. The lignin derivatives are dispe...
04/25/2006
7029202Method for treating metal-contaminated water and soil
A method for removing metal contaminants from water uses lignin derivatives, such as lignosulfonates and kraft lignin, a coagulant, such as a metal salt, and a pH-increasing composition. The lignin derivative is dispersed in the contaminated water, the coagulant is ...
04/18/2006
7019189Process and composition for the immobilization of radioactive and hazardous wastes in borosilicate glass
The present invention provides processes to immobilize radioactive and/or hazardous waste in a borosilicate glass, the waste containing one or more of radionuclides, hazardous elements, hazardous compounds, and/or other compounds. The invention also provides borosil...
03/28/2006
7017371Method for producing a glass
Glass produced on basis of a raw material in form of a mixture of mainly mineral-containing components comprising sludge from e.g. purification plants and waste products from the industry, and having a determined chemical composition adjusted on basis of knowledge o...
03/28/2006
7011756In situ immobilization of metals within density variant bodies of water
A method for treating (in situ) large bodies of water contaminated with heavy metals and having varying density stratas to immobilize the contaminant metals is disclosed. The method, or process for (in situ) immobilization of metals is focused on treating large bodi...
03/14/2006
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