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| Number | Title | Issue Date |
| 8158097 | Method of making pure salt from FRAC-water/wastewater The present invention relates to a method for making pure salt comprises recapturing post-drilling flowback water from hydro-fracturing; removing oil from the flowback water; filtering the flowback water using an ultra filter with a pore size of about 0.1 microns or... | 04/17/2012 |
| 8133467 | Processes for conjointly producing bromine and calcium chloride Processes are provided for conjointly producing Br2 and a concentrated aqueous solution containing at least about 5 wt % CaCI2, based on the weight of the concentrated aqueous solution, from an aqueous HBr rich stream and, optionally, a feed brine dilute in CaCI2. S... | 03/13/2012 |
| 8133468 | Processes for conjointly producing bromine, calcium chloride, and chlorine Processes are provided for conjointly producing Br2, a concentrated aqueous solution containing CaCI2, and Cl2 from an aqueous HBr-rich stream and a feed brine dilute in CaCI2 that comprises NaCI. Such processes can compri... | 03/13/2012 |
| 8133469 | Processes for conjointly producing bromine and calcium chloride Processes are provided for conjointly producing Br2 and a concentrated aqueous solution containing at least about 5 wt % CaCI2, based on the weight of the concentrated aqueous solution, from an HBr-rich recycle stream and a feed brine dilute in... | 03/13/2012 |
| 7452520 | Process for the production of calcium bromide by liquid-liquid extraction A process for the production of calcium bromide from feed brines, particularly from Dead Sea End Brine (EB), is described. The process comprises extracting the feed brine in countercurrent with a composite organic solvent; optionally, purifying the extract to increa... | 11/18/2008 |
| 7371357 | Process for removal of pollutants A process for the removal of pollutants from a combustion process and, more particularly, a process for removing pollutants such as carbon dioxide, mercury, sulphur dioxide, nitrogen compounds and oxygen compounds from a combustion process. The process includes the ... | 05/13/2008 |
| 7340941 | Dense thin film-based chemical sensors and methods for making and using same Sensors for determining the ambient amount (e.g., concentration) of a chemical (e.g., molecular hydrogen in a gas or vapor) are disclosed. Preferred embodiments of these sensors comprise a dense thin metal (e.g., palladium or a palladium alloy) film disposed on a mi... | 03/11/2008 |
| 7270707 | Method for the preparation of diamond, graphite or their mixture The present invention provides a method of preparation for diamond, graphite or mixtures of diamond and graphite by reduction of CO or CO2. Said method comprises a step of contacting an active metal capable of reducing a carbon source into elementary carb... | 09/18/2007 |
| 7217402 | Apparatus and method for making metal chloride salt product A method of producing metal chlorides is disclosed in which chlorine gas is introduced into liquid Cd. CdCl2 salt is floating on the liquid Cd and as more liquid CdCl2 is formed it separates from the liquid Cd metal and dissolves in the salt. T... | 05/15/2007 |
| 7182873 | Method of fluoride-containing wastewater treatment First, a primary fluoric ion concentration detection process is performed, and a primary calcium salt addition process is performed to add calcium salt in a first reaction tank, wherein the dosage of the calcium salt in the primary calcium salt addition process is d... | 02/27/2007 |
| 7087209 | Method for producing a halide brine A method for producing halide brine wherein an alkali and a reducing agent are added to an aqueous fluid having a density greater than 8.30 lb/gal., (0.996 kg/L) water, waste water or sea water for example. The resulting fluid is then contacted with a halogen to for... | 08/08/2006 |
| 7077968 | Method for continuously filtering raw brine for use in chlor-alkali electrolysis The method of continuously processing raw brine with a solids content to obtain substantially solids-free pure brine (E) for use in chlor-alkali electrolysis. In this method the raw brine (A) is separated, by means of a decanter (1), into a clear brine (B) wi... | 07/18/2006 |
| 7037480 | Calcium chloride purification Significant amounts of soluble fluoride, known to create problems in processes requiring high quality grade calcium chloride, are removed from calcium chloride solution using hydroxyapatite as a removal mechanism. Under acidic conditions, calcium chloride solution i... | 05/02/2006 |
| 6849199 | Snow and ice-melting granules and method for preparing same Snow and ice-melting granules prepared from compacted blends of salts of alkali and/or alkaline earth metals and a method for preparing such granules, are provided. The inventive granules have improved mechanical properties and, as such, are not readily reduced to a... | 02/01/2005 |
| 6827920 | Method for preparing barium fluorohalide-based crystal A method for preparing barium fluorohalide-based crystal, which includes at least a step in which a halide aqueous solution (B) and aqueous solutions of a fluoride and a barium salt are mixed into a halide aqueous solution (A). The halide aqueous solution (B) contai... | 12/07/2004 |
| 6827878 | Spherical particles of rare earth activated barium fluoride halide phosphor precursor Spherical particles of a rare earth activated barium fluoride halide phosphor precursor having the formula(I): Ba1-aMIIaFX:yMI,zLn (I) [in which MII is Ca or Sr; MI is Li, Na,... | 12/07/2004 |
| 6806039 | Photolithographic element blank calcium strontium fluoride UV transmitting mixed fluoride crystal with minimized spatial dispersion The invention provides a UV below 200 nm lithography method utilizing mixed calcium strontium fluoride crystals. The invention includes providing a below 200 nm radiation source for producing | 10/19/2004 |
| 6777365 | Magnesium compound, olefin polymerization catalyst, and method for producing olefin polymer The invention relates to a magnesium compound effective in producing olefin polymers having an increased bulk density and a narrowed particle size distribution, not lowering the stereospecificity of the polymers produced and not lowering the polymerization activity ... | 08/17/2004 |
| 6761873 | Method for reducing the bromide content in an aqueous bromide-containing solution using hydrogen peroxide The invention relates to a method for reducing the bromide content in an aqueous bromide-containing solution using hydrogen peroxide. ... | 07/13/2004 |
| 6723139 | Method for recycling fine calcium fluoride powder Process for recycling a composition comprising pulverulent calcium fluoride in the form of micrometric particles comprising: (i) a stage of mixing, in the presence of water, the said composition with pulverulent calcium fluoride (also known as natural spar), ... | 04/20/2004 |
| 6706211 | Process for producing inorganic fine grains, inorganic fine grains, rare earth element-activated barium fluorohalide fluorescent substance, and radiation image conversion panel A process for producing inorganic fine grains in a definite form having a small grain size, the inorganic fine grains obtained by this process, a rare earth element-activated barium fluorohalide fluorescent substance made using the grains, and a radiation image conv... | 03/16/2004 |
| 6692710 | Method for obtaining magnesium by leaching a laterite material The present invention provides methods for the isolation and production of magnesium products from leaching of laterite material with acid. A magnesium compound is formed by downstream treatment of a leach stream after at least one of nickel or cobalt hav... | 02/17/2004 |
| 6602482 | Separation of metal chlorides from their suspensions in chlorosilanes A process for separating metal chlorides from a suspension of metal chlorides in chlorosilanes, in which the suspension is filtered under pressure in the absence of air and moisture forming a filter cake, which is granulated and passed to a dissolution zo... | 08/05/2003 |
| 6555075 | Method of preparing zinc carbonate A method for preparing basic zinc carbonate from die casting ash, zinc skimming or zinc ash includes heating urea or a mixture of urea and ammonia and carbon dioxide with water in a closed vessel with zinc ash. After zinc is dissolved in sufficient quanti... | 04/29/2003 |
| 6507020 | Halide compound mass spectrometry method and mass spectrometry apparatus A mass spectrometry apparatus is provided with an emitter for emitting metal ions, a reaction chamber where the detected gas is introduced and ionized by the metal ions, an aperture for guiding molecules of the ionized detected gas, and a mass spectromete... | 01/14/2003 |
| 6492561 | Alkaline earth metal alkylene diamides, method for their production, and their use Alkaline earth metal alkylene diamides of Ba, Sr, Ca and a method for their production.... | 12/10/2002 |
| 6423292 | Anhydrous magnesium chloride preparation process Anhydrous MgCl2 is prepared by a) dissolving magnesite in a starting melt of MgCl2 --CeCl3 forming MgCl2 +CeOCl+CO2.uparw., b) and converting the CeOCl back to CeCl3 by chlorination with Cl... | 07/23/2002 |
| 6409980 | Process and apparatus for treating foundry sludge to recover magnesium Process and apparatus for recovering magnesium from foundry sludge and cell bleed electrolytes includes structure and/or steps for: (i) dissolving, in a water slurry, soluble chloride compounds in the magnesium-containing material; (ii) acidifying the wat... | 06/25/2002 |
| 6376738 | Process and system for treating material containing noxious components A process for treating a waste or treatable material containing noxious component(s), comprising the following steps: (1) carrying out a first step for the treatable material, the first step including (a) mixing a treatment agent with the treatable materi... | 04/23/2002 |
| 6342312 | Calcium fluoride crystal, optical article and exposure apparatus for photo-lithography using the same A calcium fluoride crystal in which the light transparency does not deteriorate with consecutive irradiation by high output short wavelength light over long time periods. A calcium fluoride crystal in accordance with the present invention has an internal ... | 01/29/2002 |
| 6309618 | Method for treating exhaust gas containing fluorine-containing interhalogen compound, and treating agent and treating apparatus A treating method comprising contacting a fluorine-containing interhalogen compound first with a treating agent for the fluorine component and then with a treating agent for the halogen component, treating agents therefor, and a method for treating exhaus... | 10/30/2001 |
| 6309621 | Process for producing high test hypochlorite and calcium chloride aqueous solution An economical, industrial and ecologically-sound process for producing high test hypochlorite and a calcium chloride aqueous solution comprising the steps of (a) preparing milk of lime, (b) chlorinating the milk of lime to crystallize calcium hypochlorite... | 10/30/2001 |
| 6277351 | Crucible for growing macrocrystals A crucible having an inner surface is not wetted by a melt which shrinks when it solidifies is provided with indentations in the walls of the crucible to support an ingot grown in it. Supporting the crystal provides a gap between the bottom of the ingot a... | 08/21/2001 |
| 6231822 | Recovering chloride and sulfate compounds from spent potliner A method of recovering chloride and sulfate salts from spent potliner using acid digestion.... | 05/15/2001 |
| 6217836 | Recovering carbon, silica and alumina from spent potliner Spent potliner from aluminum reduction cells is treated, for example, with sulfuric acid to recover carbon, silica and alumina or to recover a vitrified product of silca and alumina.... | 04/17/2001 |
| 6132490 | Bromide salts as weightening agents for molten salts A weightening composition for weightening a molten salt in the refinement of magnesium or magnesium alloys, characterized in that it comprises one or more bromide salts, selected from among NaBr, KBr, MgBr2 or CaBr2.... | 10/17/2000 |
| 6000341 | Methods and composition for mineralizing and fluoridating calcified tissues This invention involves new compositions and methods of use and delivery of amorphous calcium compounds such as: amorphous calcium phosphate (ACP), amorphous calcium phosphate fluoride (ACPF), amorphous calcium carbonate phosphate (ACCP), amorphous calciu... | 12/14/1999 |
| 6001316 | Method for treatment of waste material and recovering MgCl2 Method of treatment of environmentally hazardous waste material and recovering MgCl2 brine, based on dissolving of the waste material in water and hydrochloric acid and simultaneous removal of ammonia at elevated temperatures, destruction of re... | 12/14/1999 |
| 5980854 | Method for the production of a magnesium chloride solution The present invention is concerned with a method for the extraction of magnesium from magnesium-containing materials such as magnesite, dolomite and silicates materials like serpentine residues, products from the amphibole or pyroxene group. The magnesium... | 11/09/1999 |
| 5882361 | Method for producing calcium chloride scales In the method, calcium chloride scales (75) are produced on a cooled surface (20), namely through the application of a layer (70) consisting of an aqueous CaCl2 solution (7) to the cooled surface, solidification of the layer and stripping off t... | 03/16/1999 |
