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7867471 |
Process for preparing advanced ceramic powders using onium dicarboxylates
A process of producing a ceramic powder including providing a plurality of precursor materials in solution, wherein each of the plurality of precursor materials in solution further comprises at...
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7780936 |
Process for manufacturing an electrochemical device
Process for manufacturing an electrochemical device including a cathode, an anode and at least one electrolyte membrane disposed between the anode and the cathode, wherein at least one of the...
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7357910 |
Method for producing metal oxide nanoparticles
Method for producing metal oxide nanoparticles. The method includes generating an aerosol of solid metallic microparticles, generating plasma with a plasma hot zone at a temperature sufficiently...
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7291317 |
Method for synthesizing extremely high-temperature melting materials
The invention relates to a method of synthesizing high-temperature melting materials. More specifically the invention relates to a containerless method of synthesizing very high temperature melting...
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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...
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7195745 |
Method of preparing a product based on phosphate of thorium and/or actinide(s)
The invention relates to a process for the preparation of a product based on a phosphate of at least one element M(IV), for example of thorium and/or of actinide(IV)(s). This process comprises the...
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6951634 |
Process for recovery of daughter isotopes from a source material
The invention includes a method of separating isotopes from a mixture containing at least two isotopes in a solution. A first isotope is precipitated and is collected from the solution. A daughter...
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6830738 |
Low-temperature synthesis of actinide tetraborides by solid-state metathesis reactions
The synthesis of actinide tetraborides including uranium tetraboride (UB4), plutonium tetraboride (PuB4) and thorium tetraboride (ThB4) by a solid-state metathesis reaction are demonstrated. The...
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6780394 |
High pressure production of perovskites and resulting products
A perovskite feedstock (powder or preform) is placed in a high-pressure cell of a high pressure/high temperature (HP/HT) apparatus and subjected to pressures in excess of about 2 kbar and...
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6482387 |
Processes for preparing mixed metal oxide powders
Described are preferred polymerized organic-inorganic processes for producing mixed metal oxide powders suitable for use in the ceramics and related industries. The preferred processes employ a...
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6217841 |
Process for the preparation of metal carbides having a large specific surface from activated carbon foams
The invention relates to a silicon carbide or metal carbide foam to be used as a catalyst or catalyst support for the chemical or petrochemical industry or for silencers, as well as the process for...
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6207130 |
Metal-exchanged carboxylato-alumoxanes and process of making metal-doped alumina
A method has been developed for the solution-based metal exchange of carboxylato-alumoxanes [Al(O)x (OH)y (O2 CR)z ]n with a wide range of metal cations. Metal-exchanged carboxylato-alumoxanes are...
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6110437 |
Method for preparing a mixture of powdered metal oxides from nitrates thereof in the nuclear industry
A thermal decomposition method useful in the nuclear industry for preparing a powdered mixture of metal oxides having suitable reactivity from nitrates thereof in the form of an aqueous solution or...
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5953678 |
Thorium phosphates, method for preparing same, and use thereof for storing radioactive materials
The invention relates to novel thorium phosphates, their preparation process and their use for the storage of radioactive products.These novel thorium phosphates comply with the formulas Th4 P6 O23...
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5925798 |
Thoria catalyst
A more reactive thoria catalyst for the production of diaryl ethers from aromatic compounds, a process for making the catalyst and the use of the catalyst is taught. The thoria catalyst has a...
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5440876 |
Exhaust gas purification
A method of removing particulate and other materials from the exhaust gases from an internal combustion engine in which the exhaust gas is passed through a bed of charged ferro-electric materials....
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5405590 |
Off-gas scrubber system
An off-gas quencher and solid recovery scrubber unit includes a wet flue gas scrubber which has the dual responsibilities of lowering the temperature of the inlet hot gas entering through the...
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5205999 |
Actinide dissolution
A process for the treatment of a material which is or is suspected to contain or carry one or more actinides or compounds thereof to dissolve such actinides or compounds comprises contacting the...
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5188809 |
Method for separating coke from a feed mixture containing zirconium and radioactive materials by flotation process
A process for separating a feed mixture of zirconium and petroleum coke containing traces amount of radioative materials by flotation process utilizing a plurality of flotation cells. The process...
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5128112 |
Synthesis of actinide nitrides, phosphides, sulfides and oxides
A process of preparing an actinide compound of the formula Anx Zy wherein An is an actinide metal atom selected from the group consisting of thorium, uranium, plutonium, neptunium, and americium, x...
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4954293 |
Separation of thorium and rare earth values from fluoride concentrates thereof
Thorium and rare earth values are separated from a fluoride concentrate thereof, by decomposing such concentrate with aqueous sodium hydroxide under conditions such that the amount of sodium...
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RE33243 |
Process for treating a metal oxide powder
The invention relates to a process for the treatment of a metal oxide powder, particularly a UO2 or PuO2 powder, with a view to its fritting.This process consists of oxidizing the powder, so as to...
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4752454 |
Process for the preparation of ultrapure active metal fluorides
This invention provides a method for the preparation of ultrapure active metal fluorides of increased purity from their metal oxides by reacting an active metal with a predetermined amount of...
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4724127 |
Method for recovery of actinides from refractory oxides thereof using O F2
Method for recovery of actinides from nuclear waste material containing sintered and other oxides thereof using O2 F2 to generate the hexafluorides of the actinides present therein. The...
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4670198 |
Binder system for the manufacture of nuclear fuel pellets, and the method and product thereof
A reproducible method and stable binder composition for preserving the induced plasticity of a particulate ceramic material admixture comprising uranium dioxide and a fugitive binder, and product...
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4590090 |
Method for making interdiffused, substantially spherical ceramic powders
Substantially homogeneous, substantially spherical interdiffused metallic oxide particles, especially useful in plasma spraying applications, are readily and economically prepared from constituent...
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4532230 |
High surface area ThO2 catalyst and method of preparing it
A ThO2 catalyst having a high surface area of about 80-125 m2 /g is synthesized. The compound is synthesized by simultaneously mixing an aqueous solution of ThNO3 (NO3)4.4H2 O with an aqueous...
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4519986 |
Process for preparation of ultrapure thorium fluoride
The specification discloses a process for the preparation of ultrapure thorium fluoride (ThF4) having minimized water content and consequent maximized optical transmission of 10.6 micrometer...
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4459268 |
Method of separating thorium from plutonium
A method of chemically separating plutonium from thorium. Plutonium and thorium to be separated are dissolved in an aqueous feed solution, preferably as the nitrate salts. The feed solution is...
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4434137 |
Method for dissolving hard-to dissolve nuclear fuels
Dissolving hard-to-dissolve nuclear fuels such as ThO2 and PuO2 in a nitric acid fission material solution which contains nitric acid and a Pu-fluoride complex to provide free fluorine ions in a...
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4399108 |
Method for reprocessing and separating spent nuclear fuels
Spent nuclear fuels, including actinide fuels, volatile and non-volatile fission products, are reprocessed and separated in a molten metal solvent housed in a separation vessel made of a...
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4364859 |
Method for producing oxide powder
A method for the heat treatment of a radioactive substance by microwave power comprising preparing a nitrate solution of uranium, thorium, plutonium or a mixture thereof, and applying to the...
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4331618 |
Treatment of fuel pellets
A method of treating a nuclear reactor fuel pellet which has been irradiated and is at least partially depleted of its initial fissile material content to substantially reduce the amount of fuel...
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4269706 |
Method of decontaminating radioactive process waste waters
Process waste waters at a pH of about 7 contaminated with radioactive isotopes are decontaminated by (a) adjusting the pH to about 5.8, (b) adding CaO or Ca(OH)2 to raise the pH to about 8.5, (c)...
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4237201 |
Ionic conductivity materials, suitable for constituting solid electrolytes for dry cells and batteries
Novel compounds or compositions are provided capable of serving as solid electrolytes involving intercalated dichalcogenides having a combination of a tetravalent metal ion with a metal ion of...
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4205964 |
Process for producing ceramic powders and products resulting therefrom
A process and products produced thereby, e.g., alumina tools, in which ceramic powder particles are subjected to high transmissive energy milling under dry conditions and with given ratios of...
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4193953 |
Hydrosol droplet casting process for production of nuclear fuel and breeder material granules
A hydrosol containing, in nitrate form, a fuel or fuel-and-breeder material which is projected horizontally in the form of droplets into a gas phase containing gaseous ammonia and allowed to fall...
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4187280 |
Process for recovering useable products from by-product ammonium nitrate formed in the manufacture of nuclear reactor fuels or breeder materials
Radiation-contaminated ammonium nitrate is heated in solution to about 100° C. in the presence of finely powdered calcium oxide or lithium hydroxide. Ammonia and water vapor are given off leaving ...
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RE29515 |
Metal cyanide complexes
Metal cyanide complexes of a single metal or mixed-metal complexes in which a metal is complexed with cyanide. The metals preferably include magnesium, beryllium, aluminum, chromium, titanium,...
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4065544 |
Finely divided metal oxides and sintered objects therefrom
Finely-divided metal oxides are prepared by the steps of (a) contacting a compound of a metal with a carbohydrate material to obtain an intimate mixture thereof, (b) igniting this mixture to...
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4059539 |
(U,Zr)N alloy having enhanced thermal stability
A nitrided alloy of uranium and zirconium is provided which consists of a single-phase UN structure containing a dissolved amount of Zr as ZrN, effective to inhibit dissociation of the UN phase.
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4029740 |
Method of producing metal nitrides
A method is provided for producing a selected metal nitride utilizing a salt bath. The selected metal is introduced into the salt bath in the presence of gaseous nitrogen and at least a certain...
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4011289 |
Manufacture of microglobules
Uniform microspheres substantially or completely free from internal cavities and voids are prepared by spraying an aqueous hydrated metal oxide solution onto the surface of a water-immiscible...
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3979500 |
Preparation of finely-divided refractory powders of groups III-V metal borides, carbides, nitrides, silicides and sulfides
The preparation of metal and metalloid carbides, borides, nitrides silicides and sulfides by reaction in the vapor phase of the corresponding vaporous metal halide, e.g., metal chloride, with a...
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3976749 |
Method for producing pure monocarbides, mononitrides and carbonitrides
Pure monocarbides, or pure mononitrides or carbonitrides of metals are prepared by first forming a mixture of carbon with an oxalate of the metals and thermally decomposing the metal oxalate in the...
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3975290 |
Aerosol synthesis of ceramic powders
A method of coprecipitating a mixed oxalate to be used as a laser material in which one of the reactants is introduced as droplets formed by an aerosol into a bath containing the second reactant.
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3953578 |
Method for purification of industrial flue gases
Improved methods and apparatus for the purification of industrial flue gases, combustion products and gaseous effluents before their rejection to the atmosphere, said gases and effluents containing...
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3953355 |
Preparation of uranium nitride
A process for preparing actinide-nitrides from massive actinide metal which is suitable for sintering into low density fuel shapes by partially hydriding the massive metal and simultaneously...
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3947542 |
Process for treatment of pyrochlore concentrates
A continuous process for extraction of niobium, rare earths and thorium from niobium ore concentrates which includes digesting the ore with a hot solution containing 13 to 16 moles of sulphuric...
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3923959 |
Method for preparing actinide nitrides
Actinide nitrides, and particularly plutonium and uranium nitrides, are prepared by reacting an ammonia solution of an actinide compound with an ammonia solution of a reactant or reductant metal,...
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