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| Number | Title | Issue Date |
| 8080083 | Method and apparatus for converting oxidized mercury into elemental mercury An oxidized mercury converter utilizes a combination of heat, reduced pressure, and dilution when converting oxidized mercury in a gas sample into elemental mercury. The converter applies heat to a gas sample to thermally convert oxidized mercury within a gas sample... | 12/20/2011 |
| 7879134 | Conditioning system and method for use in the measurement of mercury in gaseous emissions Embodiments of the invention relate generally to systems used to measure mercury in gaseous emissions. In one aspect, the invention is directed to the use of silicon carbide as material for a thermal pyrolysis unit. In another aspect, at least one of silicon nitride... | 02/01/2011 |
| 7799113 | Conditioning system and method for use in the measurement of mercury in gaseous emissions Embodiments of the invention relate generally to systems used to measure mercury in gaseous emissions. In one aspect, the invention is directed to the use of an inert covalently bonded material selected from silicon carbide (SiC), silicon oxides (SiOn, n=... | 09/21/2010 |
| 7361209 | Apparatus and process for preparing sorbents for mercury control at the point of use A system for treating a contaminated gas stream is provided that includes a comminution device 204 operable to effect size reduction of a plurality of sorbent particles and form a plurality of comminuted particles, a plurality of nozzles 224 distribute... | 04/22/2008 |
| 7326346 | High 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 |
| 7314507 | Apparatus and method for removing mercury vapor from a gas stream A metallic filter effectively removes mercury vapor from gas streams. The filter captures the mercury which then can be released and collected as product. The metallic filter is a copper mesh sponge plated with a six micrometer thickness of gold. The filter removes ... | 01/01/2008 |
| 7244401 | Apparatus for separation of constituents from matrices The present invention provides an apparatus useful for the separation of hazardous and non-hazardous organic and inorganic constituents from various matrices. A method of separating such constituents is also provided. ... | 07/17/2007 |
| 7235220 | Exhaust gas treatment method, exhaust gas treatment system, and catalytic oxidation apparatus The present invention provides an exhaust gas treatment method including oxidation treatment for converting metallic mercury contained in combustion exhaust gas into mercury chloride; and mercury removal treatment for removing mercury from the combustion exhaust gas... | 06/26/2007 |
| 7217401 | Mercury 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 |
| 7214254 | Method 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 |
| 7183235 | High 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 |
| 7156027 | Method for producing soil, soil-processing unit, method for processing and unit for processing An object to be treated such as soil, burned fly ashes, or the like containing organic halides is introduced to a hermetically sealable thermal decomposition furnace 310 and heated under reduced pressure. Emitted gases of the object to be treated are treated ... | 01/02/2007 |
| 7141091 | Method and apparatus for removing particulate and vapor phase contaminants from a gas stream The present invention provides methods for removing particulate and a vapor phase contaminant from a gas stream including, in one embodiment, directing a gas stream comprising fly ash and a vapor phase contaminant into a particulate collection device, wherein the pa... | 11/28/2006 |
| 7060233 | Process for the simultaneous removal of sulfur and mercury A process for removing hydrogen sulfide, other sulfur-containing compounds and/or sulfur and mercury from a gas stream contaminated with mercury, hydrogen sulfide or both. The method comprises the step of selective oxidation of hydrogen sulfide (H2S) in a... | 06/13/2006 |
| 7048781 | Chemically-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 |
| 6960329 | Method and apparatus for removing mercury species from hot flue gas A method of removing mercury from flue gas containing mercury and particulate solids emanating from a fossil-fuel energy conversion plant and passing through a flue gas duct. The method includes (a) contacting the mercury in the flue gas with a solution containing a... | 11/01/2005 |
| 6942840 | Method for removal and stabilization of mercury in mercury-containing gas streams The present invention is directed to a process and apparatus for removing and stabilizing mercury from mercury-containing gas streams. A gas stream containing vapor phase elemental and/or speciated mercury is contacted with reagent, such as an oxygen-containing oxid... | 09/13/2005 |
| 6911570 | Method for fixating sludges and soils contaminated with mercury and other heavy metals The invention relates to a method, composition and apparatus for stabilizing mercury and other heavy metals present in a particulate material such that the metals will not leach from the particulate material. The method generally involves the application of a metal ... | 06/28/2005 |
| 6878358 | Process for removing mercury from flue gases Process for removing mercury from flue gases of high-temperature plants, in particular power stations and waste incineration plants in which a bromine compound is fed to the multistage furnace and/or the flue gas in a plant section downstream of the furnace, the tem... | 04/12/2005 |
| 6800112 | Mercury recovery method Both ends of a bulb of a waste fluorescent lamp are cut off, a phosphor layer formed on an interior surface of the bulb is detached, so that mercury-containing phosphor powder can be obtained. The mercury-containing phosphor powder is subjected to a heating and redu... | 10/05/2004 |
| 6416567 | Removal of mercury from waste materials Mercury is efficiently and effectively removed from waste materials by a process and apparatus which heats waste containing mercury to temperatures well above the boiling point of mercury to create a vapor stream laden with mercury vapor. This vapor strea... | 07/09/2002 |
| 6248217 | Process for the enhanced capture of heavy metal emissions This invention is directed to a process for forming a sorbent-metal complex. The process includes oxidizing a sorbent precursor and contacting the sorbent precursor with a metallic species. The process further includes chemically reacting the sorbent prec... | 06/19/2001 |
| 6197087 | Pyrolysis of halogenated organic hazardous wastes with direct reduction of iron oxides Disposal of halogenated organic hazardous wastes by introducing them as feedstocks in the direct reduction of iron oxide (DRI). (DRI is described in Pat. RE.32247.) The novel hydrocarbons used as reducing feedstocks would normally be destined to become ha... | 03/06/2001 |
| 6183533 | Method for removing mercury from lamp parts A secondary lamp glass and/or parts processor for removing mercury from recycled lamp parts. The device includes a housing defining a heating chamber. A heater is connected to the heating chamber to heat the lamp glass and retort the mercury on the lamp p... | 02/06/2001 |
| 6059855 | Process for decontaminating suspensions containing silt, pollutants and water In a process for decontaminating suspensions containing silt, pollutants and water, particularly mercury and hydrocarbon pollutants, the suspensions are heated under pressure to boiling temperature, then passed through a throttling device wherein the pres... | 05/09/2000 |
| 6022396 | Process for treatment of residues which arise in industrial processes and in waste incineration The residues arising from industrial processes and from waste disposal which are polluted with heavy metals and/or heavy metal compounds, are subjected to a two-stage reduction process with formation of re-usable metal-containing and silicon-containing al... | 02/08/2000 |
| 5989486 | Apparatus for removal of the mercury from granulated materials An apparatus for retorting granulated material containing mercury such as ores and precipitates wherein the granulated material is stirred by means of a plurality of paddles while under vacuum and at high temperature within a drum of the apparatus. The va... | 11/23/1999 |
| 5891216 | Oven mercury retorting device A retorting device for mercury containing material, with an oven, mercury trap and condensers capable of operation at pressures from atmospheric pressure down to 50 Torr with simultaneous temperatures up to 1500° F. A dam within the mercury trap permits ... | 04/06/1999 |
| 5824134 | Direct reduction of iron ore utilizing organic hazardous materials The use of and methods to use a novel category of hydrocarbon for direct reduction of iron ore. The novel hydrocarbons used as reducing feedstocks would normally be destined to become hazardous wastes or else their products of decomposition would be hazar... | 10/20/1998 |
| 5735933 | Method for processing metallic waste A processing method by which metals may be recovered at a high purity from metal-containing waste materials. The method for processing metal-containing waste materials comprises crushing a metal-containing waste material to a particle size of 1-50 mesh, s... | 04/07/1998 |
| 5725632 | Method for processing and utilizing metalliferous presipitates from the gas cleaning phase in thermal waste treatment A method for processing hetrogeneous metal-containing deposits recovered from the cleaning of synthesis gas produced during the thermal treatment of wastes containing metals, including volatile metals, in equipment having a heating enclosure and a waste l... | 03/10/1998 |
| 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 alumina. Oxidation is catalytically promoted. After adsorbing... | 03/04/1997 |
| 5569154 | Method and apparatus for removing mercury from mercury-contaminated soils A method for the removal of mercury from soil, wherein the soil has been contaminated with mercury. The method comprises the following steps. Soil is added to one end of an internally fired hollow screw desorber under a vacuum in the range of from about 1... | 10/29/1996 |
| 5567223 | Method for dealing with mercury-containing waste A method for dealing with mercury-containing waste including button-type batteries, wherein the waste is heated in a furnace while being agitated and in the presence of elementary selenium vapour in an amount sufficient to form mercury-selenide from essen... | 10/22/1996 |
| 5556447 | Process for treating metal-contaminated materials A process for treating wastes contaminated by toxic metals and/or organic materials is disclosed. The process involves heating the metal-contaminated wastes to a temperature sufficient to volatilize the metals. This temperature is also high enough to dest... | 09/17/1996 |
| 5529605 | Method and apparatus for removing mercury from contaminated pipes and installation parts, in particular mercury introduced by natural gas Pipe lines for conducting natural gas become contaminated, over a period of time, by an accumulation of mercury, which occurs in minute amounts in natural gas. If used pipe is scrapped, for example by melting, mercury vapor escaping to the atmosphere pose... | 06/25/1996 |
| 5443614 | Direct smelting or zinc concentrates and residues The present invention is concerned with a process for the direct smelting of zinc containing materials. The process includes volatilizing zinc from zinc-containing materials into a gas phase, while sulphur is fixed as iron sulphide in a Fe-S-O matte. Ther... | 08/22/1995 |
| 5419884 | Regenerative mercury removal process A regenerative mercury removal process for simultaneously removing high mercury and water content from a fluid comprising; contacting for a sufficient time a high content mercury-containing fluid with an adsorbent bed having sufficient silver coated or im... | 05/30/1995 |
| 5409522 | Mercury removal apparatus and method The present invention discloses an apparatus and process for removing particulate material and mercury-containing compounds from a gas stream. The apparatus includes a particulate removal means to remove the particulate material and a mercury collection m... | 04/25/1995 |
| 5403380 | Method for producing easily volatile metals, such as zinc, lead, mercury and cadmium, of sulfidic raw materials The invention relates to a method for producing zinc, cadmium, lead and other easily volatile metals from sulfidic raw materials in a pyrometallurgical process. In the method, zinc sulfide concentrate is fed into molten copper in atmospheric conditions, a... | 04/04/1995 |
