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8945489 Metal recovery process  
A process for recovering a metal chloride or mixed metal chloride from a solid waste material comprising recoverable metal containing constituents produced by lead, copper or zinc smelting and...
8410013 Catalyst for treating exhaust gas  
Provided is a catalyst for treating exhaust gas capable of reducing the amount of a highly corrosive mercury-chlorinating agent to be added while keeping the mercury oxidation efficiency high in...
8293196 Additives for mercury oxidation in coal-fired power plants  
The present invention is directed to an additive, primarily for combustion of low sulfur and high alkali coals, that includes a transition metal to impact positively bottom ash slag and optionally...
8288309 Mercury oxidation catalyst and method for producing the same  
A highly durable mercury oxidation catalyst contains V2O5 and MoO3 as active components, and is capable of preventing volatilization of MoO3 in the mercury oxidation catalyst. A method of...
8163258 Pyrometallurgical process for treating molybdenite containing lead sulfide  
A method of removing lead sulfide contained in refined molybdenite powder concentrates (major component; MoS2) is provided. More specifically, in order to solve the problems associated with a...
8142743 Method and apparatus for forming zinc oxide  
Provided is a method for forming zinc oxide which includes introducing a zinc vapor and a water vapor to a reactor; providing a zinc particulate to the reactor to promote the reaction between the...
8124036 Additives for mercury oxidation in coal-fired power plants  
The present invention is directed to an additive, primarily for combustion of low sulfur and high alkali coals, that includes a transition metal to impact positively bottom ash slag and optionally...
8048194 System and process for recovery of cadmium telluride (CdTe) from system components used in the manufacture of photovoltaic (PV) modules  
A system and associated process are provided for recovering cadmium telluride (CdTe) that has plated onto components, such as components used in the manufacture of photovoltaic (PV) modules. The...
7943109 Process for the production of Si by reduction of SiCl4 with liquid Zn  
The invention relates to the manufacture of high purity silicon as a base material for the production of e.g. crystalline silicon solar cells. SiCU is converted to Si metal by contacting gaseous...
7928033 Catalyst for reducing mercury, a mercury conversion unit, and an apparatus for measuring total mercury in combustion exhaust gas by using the same  
The present invention relates to a catalyst for reducing mercury, which comprises a reagent comprising any of the sulfites of potassium, sodium, calcium and magnesium, or any of the phosphates...
7692058 Mercury contamination extraction  
Mercury is removed from contaminated waste by firstly applying a sulfur reagent to the waste. Mercury in the waste is then permitted to migrate to the reagent and is stabilized in a mercury...
7585353 Method for reducing heavy metals in flue gases  
A method for reducing heavy metals, in particular in mercury, present in flue gases, includes the step of bringing the flue gases into contact with a particular class of sorbent material in the...
7517511 Method and apparatus for mitigating mercury emissions in exhaust gases  
Mercury emissions in an exhaust gas are mitigated. Mercury dichloride is formed upon a surface from a substantial portion of the mercury in the exhaust gas. The mercury dichloride sublimes from...
6932853 Mechanical separation of volatile metals at high temperatures  
A method of operating mechanical separation devices at high temperatures to separate various volatile metals, metal halides and metal oxides to produce high purity materials.
6921474 Chloride melt process for the separation and recovery of zinc  
Process for the production of ZnCl2 from a Zn bearing primary and/or secondary material comprising the steps of reacting the Zn bearing material with a chlorinating agent such as Cl2 to convert...
6918947 Method for making reduced iron  
A method for making reduced iron using blast-furnace sludge is provided. The method includes a mixing step of mixing the blast-furnace sludge and an iron-oxide-containing powder to prepare a mixed...
6855859 Method for controlling elemental mercury emissions  
Chlorine and sulfide species are separately introduced to a flue gas passing through a scrubber in order to remove the elemental and oxidized mercury from the gas through the precipitation of...
6682586 Assemblies and methods for processing zinc-bearing materials  
A process for separating and recovering a desired metal as metal oxide from raw material is provided. The process includes placing the raw material and a reductant in a container to form a...
6602322 High temperature metal recovery process  
An improved method and apparatus for recovering metal values from Electric Arc Furnace dust, particularly zinc and iron values, by mixing EAF dust and carbonaceous fines to form a particulate...
6572782 Process for recycling CdTe/Cds thin film solar cell modules  
Recycling process for CdTe/CdS thin film-solar cell modules in which the modules are mechanically disintegrated into module fragments, the module fragments are exposed to an oxygen-containing...
6399851 Method and apparatus for removing mercury and organic contaminants from soils, sludges and sediments and other inert materials  
An apparatus for thermally separating mercury and organic contaminants from inert substrate materials (such as soil, sludges, sediments, drilling muds and cuttings), comprising an essentially...
6214304 Method of removing mercury from a mercury-containing flue gas  
A method of removing mercury from a mercury-containing flue gas, especially flue gas from a refuse incinerator, is provided. The mercury-containing flue gas may also contain dust, further heavy...
6156281 Process for removal of hazardous air pollutants from coal  
An improved process for removing mercury and other trace elements from coal containing pyrite by forming a slurry of finely divided coal in a liquid solvent capable of forming ions or radicals...
6102982 Method for recovering zinc oxide from dust  
A method for recovering zinc oxide comprises the steps of: agglomerating a dust; charging the agglomerate to a molten iron in a melting furnace; collecting a dust generated from the melting...
6030433 Method for extracting metals from metal-containing materials by pyrohydrolysis  
A method for extracting metals from metal-containing materials, especially waste, by pyrohydrolysis. The metal-containing materials which contain at least one or more of the metals from the group...
6024931 Process for removing mercury from mercury contaminated materials  
Mercury-contaminated substances are fed through a shredder to a loader that loads a rotary tubular kiln, in which a mercury content is evaporated by a primary burner. A temperature of an unlined...
5900042 Method for the removal of elemental mercury from a gas stream  
A method is provided to remove elemental mercury from a gas stream by reacting the gas stream with an oxidizing solution to convert the elemental mercury to soluble mercury compounds. Other...
5851490 Method for utilizing PH control in the recovery of metal and chemical values from industrial waste streams  
An improved method for the recovery of metal and/or chemical values from an industrial waste stream containing zinc, cadmium, lead and/or iron compounds by heating the waste stream in a reducing...
5728193 Process for recovering metals from iron oxide bearing masses  
A process for recovering iron from an iron oxide bearing mass. The process includes forming a bed of lump coke in a vertical shaft furnace, feeding the iron oxide bearing mass and scrap metal onto...
5698759 Treatment of polyvinylchloride  
A method is described which allows two hazardous waste products, namely PVC and electric arc furnace dust, both of which have negative commercial value, to be combined to produce an iron oxide...
5667556 Method of reprocessing zinc- and iron oxide-containing residual material  
This invention describes a method of reprocessing zinc- and iron oxide-containing residual material. Zinc- and iron oxide-containing dust and/or sludge is granulated with water, granules and...
5612008 Process for treating solid waste containing volatilizable inorganic contaminants  
A process for the removal of volatilizable inorganic contaminants from solid waste is provided. The process comprises the steps of: (a) providing solid waste containing volatilizable inorganic...
5607496 Removal of mercury from a combustion gas stream and apparatus  
in a hot combustion gas stream are removed therefrom by oxidizing the elemental mercury, to form a mercury compound, and adsorbing the mercury compounds on adsorbent particles such as activated...
5582812 Process for gas phase conversion of diethylzinc to zinc oxide powder  
A vapor of diethylzinc or dimethylzinc is reacted with water vapor to form very small particles of depleted zinc oxide which are entrained in the gas flow. In accordance with one version of the...
5531805 Smelting ferrous materials  
Finely divided ferruginous material is intimately mixed with finely divided carbonaceous material and agglomerated and formed into pellets typically of a few cubic centimeters volume to form a...
5403365 Process for low mercury coal  
A process for producing low mercury coal during precombustion procedures by releasing mercury through discriminating mild heating that minimizes other burdensome constituents. Said mercury is...
5364441 Cotreatment of sewage and steelworks wastes  
Steelworks dusts or sludge is mixed into sewage preferably in the presence of a flocculating agent to provide a rapid separation of a clear effluent and a sludge which is dewatered and dried to...
5178667 Dry process for refining zinc sulfide concentrates  
A pyrometallurgical refining process for obtaining one or both of zinc and lead from a sulfide concentrate, in which an iron-silicate slag or iron-silicate slag containing lime is formed and the...
5162107 Method of reprocessing zinc- and lead-containing residues from metallurgical plants by means of a circulating fluidized bed system  
A zinc- and lead-containing residue from a metallurgical plant is reprocessed by a thermal treatment in a circulating fluidized bed system. A major part of the heat demand is satisfied by a...
5108496 Method for the concentration of dusts in a cupola furnace with metal particles  
A process for the econimic recovery of metallic fractions generated during operation of a cupola furnace comprises the steps of the separating filter dust containing metal fractions from an...
5013532 Method for recycling electric arc furnace dust  
This invention relates to the metallurgy of iron and particularly to the separation and recovery of metals from electric arc furnace (EAF) dusts. While the invention discloses a process for the...
4966763 Direct vapor/solid synthesis of mercuric iodide using compounds of mercury and iodine  
A process is disclosed for producing high purity mercuric iodide by passing a gaseous source of a mercuric compound through a particulate bed of a low vapor pressure iodide compound which is...
4962276 Process for removing mercury from water or hydrocarbon condensate  
A method for removing mercury from water or hydrocarbon condensate is provided. The mercury-containing liquid is sprayed into a stripper having a packing therein to facilitate its contact with a...
4889702 Process for removing metallic constituents from dust obtained during the electrothermal production of yellow phosphorus  
Metallic constituents, especially heavy metal constituents are removed from dust electrostatically separated from a gas mixture consisting substantially of carbon monoxide and phosphorus in vapor...
4874525 Purification of fluid streams containing mercury  
Mercury is selectively removed to very low levels of concentration from fluid streams such as natural gas, cracked gas, hydrogen or naphtha by passage of the stream through an adsorbent bed...
4842832 Ultra-fine spherical particles of metal oxide and a method for the preparation thereof  
Ultra-fine spherical particles of a metal oxide having an average particle diameter of 40 nm or smaller can be prepared by a method in which a vaporizable metal compound is vaporized and...
4800069 Zinc recovery from furnace dust  
Zinc and other metals are recovered form strongly bound zinc ferrite compounds in furnace dust. To the dust is added 1 weight percent of free zinc oxide unless already present. The dust is treated...
4640751 Method for the purification of gases containing mercury and simultaneous recovery of the mercury in metallic form  
A method for the purification of gases containing mercury and simultaneous recovery of the mercury in metallic form by a process where primarily a reaction takes place between metallic vapory...
4595574 Method for recovering zinc from substances containing a zinc compound  
A method for recovering zinc from substances containing a zinc compound which comprises supplying a carbonaceous substance and a zinc compound-containing substance onto the hearth layer in a...
4554150 Detector grade mercuric iodide  
Chemically pure mercuric iodide is purified to form detector-grade mercuric iodide and mercuric iodide semi-conductor crystals by vaporization in an inert gas stream containing deliberate addition...

Matches 1 - 50 out of 82 1 2 >