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| Number | Title | Issue Date |
| 8147780 | Recovery of lead in form of high purity lead carbonates from spent lead batteries incl. electrode paste Wet process of low environmental impact recovers the lead content of an electrode slime and/or of lead minerals in the valuable form of high purity-lead carbonates that are convertible to highly pure lead oxide by heat treatment in oven at relatively low temperature... | 04/03/2012 |
| 8003065 | Method for collection of valuable metal from ITO scrap Proposed is a method for collecting valuable metal from an ITO scrap including the steps of subjecting the ITO scrap to electrolysis in pH-adjusted electrolyte, and collecting indium or tin as oxides. Additionally proposed is a method for collecting valuable metal f... | 08/23/2011 |
| 7998440 | Reclaiming of lead in form of high purity lead compound from recovered electrode paste slime of dismissed lead batteries and/or of lead minerals An outstandingly low environmental impact wet process recovers the lead content of an electrode slime and/or of lead minerals in the valuable form of high purity lead oxide or compound convertible to highly pure lead oxide by heat treatment in oven at relatively low... | 08/16/2011 |
| 7906084 | Method for control of shape and size of PB-chalcogenide nanoparticles Disclosed is a method for producing, controlling the shape and size of, Pb-chalcogenide nanoparticles. The method includes preparing a lead (Pb) precursor containing Pb and a carboxylic acid dissolved in a hydrocarbon solution and preparing a chalcogen element precu... | 03/15/2011 |
| 7208133 | Method for the preparation of IV-VI semiconductor nanoparticles A high temperature non-aqueous synthetic procedure for the preparation of substantially monodisperse IV-VI semiconductor nanoparticles is provided. The procedure includes introducing a first precursor selected from the group consisting of a molecular precursor of a ... | 04/24/2007 |
| 7122168 | Shape anisotropic metal oxide nanoparticles and synthetic method thereof In a metal oxide nanoparticle and a synthetic method thereof, and in particular to maghemite (γ-Fe2O3) nanoparticles usable as a superhigh density magnetic recording substance by having good shape anisotropy and magnetic characteristics, hemat... | 10/17/2006 |
| 7115219 | Method of producing Indium Tin Oxide powder A method of producing an Indium Tin Oxide powder is described. A method of producing an Indium Tin Oxide powder comprising the steps of: (1) mixing a raw aqueous solution containing indium ions and tin ions and having a proportion of divalent tin ions in the tin ion... | 10/03/2006 |
| 7067068 | Method for preventing lead from dissolving from a lead-containing copper-based alloy A lead-containing copper-based alloy is immersed into a weak acidic or neutral etching solution having a buffer effect which is formed by adding an organic acid into a complexing agent having a high ability to form a complexing ion with lead, and lead particles pres... | 06/27/2006 |
| 7049347 | Method for making fine and ultrafine spherical particles of zirconium titanate and other mixed metal oxide systems Disclosed is a method for making amorphous spherical particles of zirconium titanate and crystalline spherical particles of zirconium titanate comprising the steps of mixing an aqueous solution of zirconium salt and an aqueous solution of titanium salt into a mixed ... | 05/23/2006 |
| 6827860 | Method for eliminating nickel ions and lead ions from ferrous salt solutions Nickel and lead ions are eliminated from an acidic concentrated iron(II) salt solution by adding an alkali sulfide and precipitating nickel and lead sulphides. ... | 12/07/2004 |
| 6806295 | Sol-gel processing with inorganic metal salt precursors Methods for sol-gel processing that generally involve mixing together an inorganic metal salt, water, and a water miscible alcohol or other organic solvent, at room temperature with a macromolecular dispersant material, such as hydroxypropyl cellulose (HPC) added. T... | 10/19/2004 |
| 6793908 | Method for preparing ITO nanometer powders A solution method for preparing indium-tin oxide (ITO) powders is provided. Indium compounds and tin compounds are dissolved in water respectively to form two solution bodies. Some proper additives are added into the solution bodies to form metal hydroxyl compounds ... | 09/21/2004 |
| 6645458 | Method for making an aqueous sodium chloride solution Process for the manufacture of an aqueous sodium chloride solution, according to which a solid material comprising sodium chloride and heavy metals is dispersed in water, the aqueous medium thus obtained is alkalinized so as to precipitate the heavy metal... | 11/11/2003 |
| 6485696 | Recovery/removal of metallic elements from waste water using ozone Ozone is used to rapidly oxidize specific metallic elements. The insoluble oxidized compounds of the metals formed by the ozonation are then recovered for industrial use in a conventional sedimentation/filtration tank or pool. There is no requirement for ... | 11/26/2002 |
| 6482371 | Process for separation of heavy metals and halogen from waste material or residue A process for the separation of heavy metal and halogen from unwanted waste material or residue. Halogen is selectively extracted or washed out from the waste material. Metal is selectively extracted or washed out from the essentially halogen free waste m... | 11/19/2002 |
| 6482372 | Process for recovering palladium from a solution A method for selectively separating and recovering palladium from an aqueous palladium/tin catalyst solution. The method includes the steps of adjusting the pH of the aqueous solution to a specified pH range thereby precipitating the tin, and producing a ... | 11/19/2002 |
| 6442977 | Sol-gel process for fabricating germanium-doped silica article A sol-gel process for fabricating bulk, germanium-doped silica bodies useful for a variety of applications, including core rods, substrate tubes, immediate overcladding, pumped fiber lasers, and planar waveguides, is provided. The process involves the ste... | 09/03/2002 |
| 6436358 | Metals removal from spent salts A method and apparatus for removing metal contaminants from the spent salt of a molten salt oxidation (MSO) reactor is described. Spent salt is removed from the reactor and analyzed to determine the contaminants present and the carbonate concentration. Th... | 08/20/2002 |
| 6423393 | Abraded stitchbonded fabric and process for making same A suede-like stitchbonded fabric is disclosed. The stitchbonded fabric includes a nonwoven substrate. A first yarn is stitchbonded into the substrate in a manner that forms loops at the surface of the substrate. A second yarn is then also stitchbonded int... | 07/23/2002 |
| 6403045 | Method for treating residues resulting from the purification of garbage and/or industrial waste incineration fumes A method for treating residues derived from garbage and/or industrial waste incineration fumes including the steps of desalting the residues by washing with sodium carbonate in sufficient amount or slightly in excess to solubilize all the salts including ... | 06/11/2002 |
| 6379635 | Process for preparing a nanocrystalline material A process for preparing a nanocrystalline material comprising at least a first ion and at least a second ion different from the first ion, and wherein at least the first ion is a metal ion, is described. The process comprises contacting a metal complex co... | 04/30/2002 |
| 6352675 | Process for removing heavy metals from a caustic fluid stream The present invention provides both reagents and a process for removing heavy metals from a caustic fluid stream by the addition of reagents which are not corrosive or deleterious. Specifically, the present invention is directed to removing heavy metals f... | 03/05/2002 |
| 6319482 | Treatment of fly ASH/APC residues including lead salt recovery The present invention relates to a process for treating fly ash/APC residues chlorides, sulphates, earth alkali metals selected from the group consisting of calcium, potassium, and sodium, and heavy metals selected from the group consisting of lead, which... | 11/20/2001 |
| 6270679 | Method for recovering and separating metals from waste streams A method is disclosed for recovering and separating precious and non-precious metals from waste streams, which removes, separates, and recovers such metals in a cost effective manner with more than 95% removal from waste streams and with minimal amounts o... | 08/07/2001 |
| 6203769 | Process for the treatment of fluoboric electrolyte The invention relates to a method for the treatment of fluoboric electrolyte resulting from the processes of electro-extraction of metals such as copper and lead comprising a leaching stage with fluoboric acid, in order to recycle said fluoboric acid to b... | 03/20/2001 |
| 6165427 | Method for removal of heavy metals from aqueous solutions using sodium di-(n-octyl)phosphinate or sodium di-(n-dodecyl) phosphinate Provided herein is a method for the removal of soluble metal species consisting of lead, cadmium, zinc and mixtures thereof, present in an aqueous effluent, the method comprising the steps of: a) contacting the aqueous effluent with a organophosphorus sal... | 12/26/2000 |
| 6149884 | Method of treating gaseous waste from a unit for manufacturing an optical fiber preform, in order to recover germanium therefrom The invention relates to a method of treating germanium-containing gaseous waste coming from a unit for manufacturing an optical fiber preform, the method comprising the following steps: a liquid effluent is formed from the gaseous waste; and the germanium is ... | 11/21/2000 |
| 6150447 | Fire retardant metal stannate coated inorganic fillers A process for the preparation of a fire-retardant material which comprises a particulate inorganic filler (other than a tin compound) coated with a layer of divalent metal hydroxystannate or a divalent metal stannate, which process comprises the steps of:... | 11/21/2000 |
| 6120750 | Method of producing lead-containing complex oxides A lead-containing complex oxide containing substantially no alkali metal is produced under hydrothermal conditions in the absence of alkali metals using a Pb source which serves also as a mineralizer for precipitating the lead-containing complex oxide. Pr... | 09/19/2000 |
| 6117209 | Hydrometallurgical process for treating alloys and drosses to recover the metal components A hydrometallurgical method involves treating a dross source containing typically both antimony and tin and treating the dross to a series of chemical operations to yield a soft lead precursor, suitable for making soft lead for lead-based alloys for batte... | 09/12/2000 |
| 6096285 | Indium tin oxide fine powder and method for preparing the same Herein disclosed is 6 indium tin oxide (ITO) fine powder whose crystal form is a corundum type one and which has a true specific gravity of not less than 6.5 g/cc, a green density of not less than 3.0 g/cc, and a Seebeck coefficient of less than 30 μV/cc... | 08/01/2000 |
| 6054104 | Method and apparatus for germanium reclamation from chemical vapor deposition A continuous system recovers germanium (Ge) from a chemical vapor deposit. A chemical vapor deposit scrubber scrubs a chemical vapor deposit to form a chemical vapor deposit scrubber solution. An equalization and neutralization mixer adds a caustic soda t... | 04/25/2000 |
| 6051166 | Indium oxide-tin oxide powders and method for producing the same A method for producing an indium oxide-tin oxide powder, which comprises supplying to react an aqueous solution of an indium salt, an aqueous solution of a tin salt and an aqueous alkaline solution into water at 40° C. or more and less than 100° C. so t... | 04/18/2000 |
| 5945035 | Conductive pigments The invention relates to electrically conductive pigments which as a conductive layer on a platelet-shaped or needle-shaped substrate have a niobium- and/or tantalum-doped tin oxide or titanium dioxide layer.... | 08/31/1999 |
| 5891362 | Hydrated zinc stannate sols, coating compositions and optical elements A sol having dispersed in a liquid medium particles of a hydrated zinc stannate having a primary particle diameter of from 2 to 200 nm and represented by the formula xZnO.ySnO2.zH.sub.2 O wherein the molar ratio of x:y:z is 1:0.83 to 1.43:1.00 ... | 04/06/1999 |
| 5840262 | Process for the manufacture of pure lead oxide from exhausted batteries The present invention relates to an improved process for producing lead oxide in a pure state from a spent paste resulting from exhausted acid batteries. The spent paste is first calcined and desulfurized, then leached by a concentrated solution comprisin... | 11/24/1998 |
| 5788913 | Processes to prepare antimony doped tin oxide electroconductive powders Solution precipitation processes for preparing antimony doped tin oxide having improved volumetric efficiency and improved wash efficiency involving use of concentrated base and metal salt solutions are disclosed.... | 08/04/1998 |
| 5722730 | Reinforcement member for pivotable assembly A reinforcement member for a pivotable assembly is provided, enhancing resistance to deflection of the componentry of the pivotable assembly when subjected to shear loading. The pivotable assembly is expressly suitable for use as a recliner for a motor ve... | 03/03/1998 |
| 5705098 | Acicular electroconductive tin oxide fine particles and process for producing same The invention provides acicular electroconductive tin oxide fine particles which has a mean diameter of 0.005-1 μm and a mean length of 0.05-10 μm and an aspect ratio of 3 or higher. The invention further provides a process for producing the acicular el... | 01/06/1998 |
| 5575957 | Acicular electroconductive tin oxide fine particles and process for producing same The invention provides acicular electroconductive tin oxide fine particles which has a mean diameter of 0.005-1 μm and a mean length of 0.05-10 μm and an aspect ratio of 3 or higher. The invention further provides a process for producing the acicular el... | 11/19/1996 |
