Matches 101 - 150 out of 348 < 1 2 3 4 5 6 7 >


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6811758 Precipitation process  
The present invention relates to a process for inducing homogeneous precipitation of a metal oxide, wherein said metal is capable of existing in at least two cationic oxidation states, which...
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...
6783855 Rare-earth-activated phosphors  
A process for preparing phosphor particles of a host oxide doped with a rare earth or manganese which comprises: preparing an aqueous solution of salts of the host ion and of the dopant ion and a...
6699617 Alkaline storage battery, hydrogen-absorbing alloy electrode and method for producing the same  
The present invention provides an alkaline storage battery excellent in high-rate charge and discharge characteristics, and a hydrogen-absorbing alloy electrode suitable for the battery and a...
6673143 Aqueous slurry of rare earth hydroxide particles  
An aqueous slurry of rare earth hydroxide particles which is particularly suitable for use as a sintering aid of a ceramic powder such as silicon nitride. The aqueous slurry, which is...
6667019 Rare earth oxide fluoride nanoparticles and hydrothermal method for forming nanoparticles  
A hydrothermal method for forming nanoparticles of a rare earth element, oxygen and fluorine has been discovered. Nanoparticles comprising a rare earth element, oxygen and fluorine are also...
6656588 Ultrafine powders and their use as lasing media  
Doped, nanosize metal oxide particles have been shown to exhibit stimulated emission and continuous-wave laser action when energized appropriately, for example by electron beams. The doped...
6610152 Method for removing inorganic matter from solid surfaces  
Metal ions are removed from solid surfaces which may be contaminated with one or more radionuclides by contacting the solid surfaces with the supercritical fluid, as, for instance, carbon dioxide...
6582814 Rare earth-transition metal oxide pigments  
Rare earth-transition metal oxides are used as pigments. The rare earth-transition metal oxide pigments are preferably of the formula (RexTm)Oy, where Re is at least one rare earth element, Tm is...
6504077 Method for the decontamination of metallic surfaces  
A method of decontaminating a radioactively contaminated oxide on a surface. The radioactively contaminated oxide is contacted with a diphosphonic acid solution for a time sufficient to dissolve...
6478982 Ferrite magnet powder and magnet using the magnet powder, and method for preparing them  
The ferrite magnet powder of the present invention is magnet powder having, as the major phase, a La—Co magnetoplumbite ferrite where La and Co are substituted for Sr and Fe, respectively,...
6468495 Treatment of molten salt reprocessing wastes  
A method of removing from a metal salt ionic species contained therein involves contacting the metal salt with an ionic liquid to dissolve the metal salt, the ionic species or both. At least in...
6461576 Pyroprocess for processing spent nuclear fuel  
This is a pyroprocess for processing spent nuclear fuel. The spent nuclear fuel is chopped into pieces and placed in a basket which is lowered in to a liquid salt solution. The salt is rich in...
6461581 Clathrate compounds and manufacturing method thereof  
The present invention provides a clathrate compound which can be used as a thermoelectric material, a hard material, or a semiconductor material. Silicon or carbon are formed into a clathrate...
6455018 Recovery of precious metal and other values from spent compositions/materials  
Precious metal values, e.g., platinum, palladium and rhodium, and, optionally, other valuable elements, e.g., one or more rare earths and cerium in particular, are recovered from a wide variety of...
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...
6365007 Photocatalysts for the degradation of organic pollutants  
A photocatalyst is provided consisting of TiO2 doped with at least one lanthanide metal oxide. The photocatalyst may be prepared by forming a titanium-containing gel and then drying the gel and...
6319429 Oxygen sensitive resistance material  
Oxygen sensitive resistance materials for use with oxygen sensors, in particular λ probes are described. These materials are based on the fact that with complex metal oxides it is possible--by...
6245305 Method of separating and purifying gadolinium-153  
The present invention is an improvement to the method of separating and purifying gadolinium from a mixture of gadolinium and europium having the steps of (a) dissolving the mixture in an acid;...
6238566 Multi-stage solvent extraction of metal value  
Proposed is an improvement in a multi-stage solvent extraction process of a metal value such as rare earth elements from an acidic feed solution containing the metal value in the form of a...
6221473 Rare-earth and alkali sulphide, method for preparing same and use thereof as a pigment  
The present invention concerns a sulfide of a rare earth and an alkali, a process for its preparation and its use as a colored pigment. The sulfide is characterized in that it has the formula ABS2...
6214301 Hafnium radioisotope recovery from irradiated tantalum  
Hafnium is recovered from irradiated tantalum by: (a) contacting the irradiated tantalum with at least one acid to obtain a solution of dissolved tantalum; (b) combining an aqueous solution of a...
6200377 Process for beneficiation of mixtures of mineral particles  
An improved process for the beneficiation of mixtures of mineral particles (such as kaolin clays) containing minerals which chelate with hydroxamates. The use of a silicon-containing compound in...
6110433 Process for the recovery of metals from used nickel/metal/rare earth hydride storage batteries  
The invention relates to a process for recovering metals from used nickel/hydride storage batteries, in which storage battery scrap has been mechanically comminuted and divided into at least a...
5980841 Method for recovering reusable elements from rare earth-nickel alloy  
A method for recovering reusable elements including rare earth elements from a rare earth-nickel alloy is disclosed, including the steps of: preparing a slurry of the rare earth-nickel alloy,...
5981445 Process of making fine ceramic powders from aqueous suspensions  
The new preparation process for making fine high specific surface ceramic powders suitable as catalysts or precursors for ceramics uses lanthanum (or other rare earth lanthanide) oxide as one of...
5966584 Method of separating trivalent actinides from trivalent lanthanides  
Trivalent actinides can be separated from trivalent lanthanides in aqueous solutions at H+ concentrations of 2 mol/l to 0.001 mol/liter by extraction with bis(aryl)dithiophosphinic acid and a...
5945342 Method for digesting spent ion exchange resins and recovering actinides therefrom using microwave radiation  
The present invention relates to methods for digesting diphosphonic acid substituted cation exchange resins that have become loaded with actinides, rare earth metals, or heavy metals, in a way...
5911921 Non-stoichiometric ytterbium phosphate powder of low infrared reflectivity  
Proposed is a powder of ytterbium phosphate having a non-stoichiometric phosphorus to ytterbium molar ratio of 1.08 to 2.0 and having a specified average particle diameter and specified diameter...
5874374 Method for producing engineered materials from salt/polymer aqueous solutions  
A method for producing engineered materials from salt/polymer aqueous solutions in which an aqueous continuous phase having at least one metal cation salt is mixed with a hydrophilic organic...
5846912 Method for preparation of textured YBa2 Cu3 Ox superconductor  
The present invention relate to textured YBa2 Cu3 Ox (Y-123) superconductors and a process of preparing them by directional recrystallization of compacts fabricated from quenched YBCO powders at...
5795554 Method for preparing the oxysulfides of rare earth elements  
The present invention discloses a method for the catalytic reduction of sulfur dioxide, for example in flue gas, by carbon monoxide using lanthanum oxysulfide as the active catalyst. The catalyst...
5787332 Process for recovering tantalum and/or niobium compounds from composites containing a variety of metal compounds  
A process for treating composite materials comprising metals and having significant radioactivity for separation into concentrated individual products is provided. The process of the invention...
5756056 Process for recovering rare earth metal from oxide ore by concentration and separation  
A process for recovering scandium economically with high efficiency by concentration and separation from an oxide ore containing nickel and a small amount of scandium as well as a large amount of...
5730874 Extraction of metals using supercritical fluid and chelate forming legand  
A method of extracting metalloid and metal species from a solid or liquid material by exposing the material to a supercritical fluid solvent containing a chelating agent is described. The...
5728355 Method for recovering reusable rare earth compounds  
A method for recovering reusable rare earth compounds such as rare earth oxides, rare earth fluorides, or rare earth metals from rare earth alloy scrap in an effective and safe manner. The method...
5716547 Stable colloidal dispersions of rare earth compounds  
Stable colloidal dispersions, in water, of rare earth compounds, e.g., yttric rare earth compounds, are produced by (a) reacting, in an aqueous reaction medium, a rare earth oxide with a...
5705100 Resistive material, and resistive paste and resistor comprising the material  
An organic vehicle is added to and kneaded with a solid component comprising from 60 to 95% by weight of a resistive material having a composition of Lax Sr1-x CoO3 (x is from 0.40 to 0.60) and...
5698483 Process for preparing nanosized powder  
A process for producing nano size powders comprising the steps of mixing an aqueous continuous phase comprising at least one metal cation salt with a hydrophilic organic polymeric disperse phase,...
5690889 Production method for making rare earth compounds  
A method of making a rare earth compound, such as a earth-transition metal permanent magnet compound, without the need for producing rare earth metal as a process step, comprises carbothermically...
5644037 Method for the preparation of polyhedral particles of a rare earth ammonium double oxalate  
Disclosed is a method for the preparation of particles of a rare earth ammonium double oxalate by mixing a first aqueous solution of ammonium oxalate and a second aqueous solution of a...
5606724 Extracting metals directly from metal oxides  
A method of extracting metals directly from metal oxides by exposing the oxide to a supercritical fluid solvent containing a chelating agent is described. Preferably, the metal is an actinide or a...
5597538 Process to remove rare earths from spent nuclear fuel  
The present invention relates to a process for removing rare earth elements (RE) from spent nuclear fuel. The spent nuclear fuel is subjected to an oxidation step at a temperature of between about...
5595714 Recovery of gadolinium and its complexing agents from aqueous solutions containing their complexes  
The invention refers to a novel process for the recovery of gadolinium and its complexing agent from aqueous solutions containing their complexes and/or salts of said complexes.
5587142 Method of dissolving metal oxides with di- or polyphosphonic acid and a redundant  
A method of dissolving metal oxides using a mixture of a di- or polyphosphonic acid and a reductant wherein each is present in a sufficient amount to provide a synergistic effect with respect to...
5534160 Method for the re-treatment of residue generated from the removal of fluorine dissolved in waste water  
A method for the re-treatment of residue generated in the course of removing fluorine from waste water.The method comprises the step of: drying the residues consisting of rare earth fluorides,...
5492680 Separation of scandium from tantalum residue using fractional liquid-liquid extraction  
A process for separating scandium from an aqueous solution comprised of a first group of metals, scandium and a second group of metals includes the steps of: (a) providing a scandium-containing...
5461013 Process for the preparation of lithium stanates doped with transition metal cations  
A process for the preparation of ceramic material Lithium stannate doped with a transition metal for a humidity sensor mixes a salt of Lithium with SnO2 in dry condition, thereafter mixes in wet...
5439656 Method for the preparation of a rare earth oxide powder  
An improved method is proposed for the preparation of a powder of a rare earth oxide having good dispersibility containing no agglomerates of particles even without undertaking disintegration...
5433931 Recovery of cerium  
Recovery of cerium values from fluoride-containing ores such as bastnasite is enhanced. The ore is ground, roasted, and leached with dilute hydrochloric acid to produce an ore concentrate. The...

Matches 101 - 150 out of 348 < 1 2 3 4 5 6 7 >