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| Number | Title | Issue Date |
| 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 |
| 7354553 | Method and apparatus for detecting the presence of elemental mercury in a gas sample An improved elemental mercury analyzer utilizes a fluorescence assembly in combination with a fluorescence quenching reduction mechanism to detect the concentration of elemental mercury within an emission gas sample, via fluorescence of the mercury within the gas sa... | 04/08/2008 |
| 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 |
| 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 |
| 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 |
| 7118720 | Method for combined removal of mercury and nitrogen oxides from off-gas streams A method for removing elemental Hg and nitric oxide simultaneously from a gas stream is provided whereby the gas stream is reacted with gaseous chlorinated compound to convert the elemental mercury to soluble mercury compounds and the nitric oxide to nitrogen dioxid... | 10/10/2006 |
| 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 |
| 6312499 | Method for stabilization of liquid mercury A method for stabilization of liquid mercury in which powdered copper particles are cleaned with a chemically reactive fluid suitable for removing surface oxidation from the surface. "Clean" powdered copper particles are mixed with liquid mercury to form ... | 11/06/2001 |
| 6221128 | Recovery and removal of mercury from effluent Mercury salt-containing discharge effluents such as from B-5 fixatives and PVA fixatives are treated to remove mercury therefrom. The present method contemplates plates the addition of aluminum to the effluent to cause the precipitation of elemental mercu... | 04/24/2001 |
| 6156214 | Process for removing mercury from alkali metal alkoxide solutions A three-stage process for removing mercury contaminants from alcoholic alkali metal alkoxide solutions is provided, in which mercury is depleted in a first filtration through inert fibrous material, followed by a second filtration through pulverized coal,... | 12/05/2000 |
| 6120579 | Process for cleaning mercury-contaminated soils The present invention relates to a process for cleaning mercury-contaminated soils that is simple, efficient and safe to use. This process can also be used to clean soils contaminated with additional metals, such as zinc, copper and lead, at a lower pH. T... | 09/19/2000 |
| 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 |
| 5968461 | Process for cleaning mercury-contaminated soils The present invention relates to a process for cleaning mercury-contaminated soils that is simple, efficient and safe to use. This process can also be used to clean soils contaminated with additional metals, such as zinc, copper and lead, at a lower pH. T... | 10/19/1999 |
| 5902376 | Recovery of mercury from caustic sludges using a hydraulic mineral separator A process for the recovery of mercury from mercury-containing caustic sludge, generated from a mercury cell, chlor-alkali plant, wherein mercury is removed from the caustic sludge by treatment in a hydraulic mineral separator. The process provides a ready... | 05/11/1999 |
| 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 constituents are also oxidized. The gas stream is then passed thr... | 05/04/1999 |
| 5785935 | Process for removing mercury from soil Heavy metals are efficiently removed from contaminated soil by a process which comprises leaching or washing the soil with a mild leachant solution comprised of an aqueous solution of an acid and a salt. Heavy metals are also efficiently removed from pain... | 07/28/1998 |
| 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 |
| 5478540 | Removal of mercury heavy metal values employing sulfur trioxide Heavy metal values can be removed and separated from a substance having a suitable amount of the heavy metal values by contacting the substance with a fluid containing sulfur trioxide to prepare a corresponding heavy metal sulfate, which is followed by le... | 12/26/1995 |
| 5391217 | Method for eliminating mercury from liquids A method for eliminating mercury from mercury containing liquids by contacting the mercury-containing liquid with a plurality of fibers wherein the fibers making up the plurality of fibers have a coating of silver on the surface of the fibers, and a silve... | 02/21/1995 |
| 5314527 | Mercury contaminated mud treatment This invention relates to a hydrometallurgical process for the treatment of mercury contaminated muds. More particularly, this process pertains to a hydrometallurgical process for the treatment of Environmental Protection Agency designated K106 muds disch... | 05/24/1994 |
| 5244492 | Process for recovery of metallic mercury from contaminated mercury-containing soil Describes a process for separating metallic mercury from soil containing same by producing an aqueous pulp of the contaminated soil in a mixing tank (12), screening the pulp in screening means (14) to separate a coarse fraction, further screening the pulp... | 09/14/1993 |
| 5242482 | Process for treating spent batteries A process is described for treating spent batteries of any type, comprising essentially the following stages: a) disintegrating the spent batteries in water to a piece size of less than 7 mm followed by stirring in water, then screening to obtain a pulverlent ... | 09/07/1993 |
| 5238488 | Process and solution for transforming insoluble mercury metal into a soluble compound A process and solution for transforming insoluble mercury metal into a soluble compound. The process includes oxidizing elemental mercury to form mercury cations, contacting the mercury cations with a complexing agent to form a soluble complex, and dissol... | 08/24/1993 |
| 5209774 | Hydrometallurgical process for treating mercury contaminated muds This invention relates to a hydrometallurgical process for the treatment of mercury contaminated muds. More particularly, this process pertains to a hydrometallurgical process for the treatment of Environmental Protection Agency designated K106 muds disch... | 05/11/1993 |
| 5183499 | Method of recovering elemental mercury from soils In a method of recovering elemental mercury from soil, the soil contaminated with elemental mercury is first sized in a screening and pressure-washing step. The fine soil particles which pass through the screening device contain essentially all of the ele... | 02/02/1993 |
| 5013358 | Method for the recovery of mercury from mercury-containing material Insoluble mercury salts and any mercury in mercury-containing material are converted into a soluble form by controlled chlorination. The soluble forms of mercury in the chlorination solution are reduced with iron, preferably iron powder, to elemental merc... | 05/07/1991 |
| 5006165 | Method for mercury refinement The effluent from mercury collected during the photochemical separation of the 196 Hg isotope is often contaminated with particulate mercurous chloride, Hg2 Cl2. The use of mechanical filtering via thin glass tubes, ultras... | 04/09/1991 |
| 4913407 | Precious metal recovery system A precious metal recovery system utilizing an amalgamation process which results in substantially complete recovery both of the precious metal sought and of the mercury utilized in the process. Mercury has undesirable health and environmental characterist... | 04/03/1990 |
| 4743298 | Process and apparatus for separating mercury and red phosphorus from one another A mixture of mercury and red phosphorus obtained by flowing an aqueous solution having at least one mercury salt dissolved in it through a layer of granular red phosphorus in a column arranged in upright position and provided, close to its lower end, with... | 05/10/1988 |
| 4298380 | Process for purifying low-melting metals from impurities According to the invention a process is proposed for purifying low-melting metals from impurities, residing in that a melt of a low-melting metal is treated with an aqueous solution of an inorganic acid or an alkali in the presence of organic compounds wi... | 11/03/1981 |
| 4149879 | Recovery of mercury and caustic values from caustic sludges Mercury and caustic values are recovered from caustic sludges in a process which comprises intermixing the caustic sludge with a liquid under pressure or agitation to produce a caustic slurry which is separated into a caustic liquor, metallic mercury and ... | 04/17/1979 |
| 4012297 | Mercury recovery and recycle process In the process of producing chlorine and caustic soda employing mercury amalgam electrolytic cells, mercury losses occur in both solid and liquid plant waste streams. This invention provides for an integrated system in which mercury is extracted from plan... | 03/15/1977 |
