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7357835 |
A crystalline material sufficiently pure for use in pharmaceuticals may be made by forming a saturated solution of the material, changing the temperature of the solution so it becomes supersaturated, and subjecting the solution to irradi...
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7128840 |
Improved methods for the extraction or dissolution of metals, metalloids or their oxides, especially lanthanides, actinides, uranium or their oxides, into supercritical solvents containing an extractant are disclosed. The disclosed embod...
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7097671 |
A methanol/water scrubbing solution containing colloidal metal sulfides formed from metal carbonyls and resulting from the scrubbing of industrial gases, such as synthesis gas, is subjected to agglomeration of the metal sulfides before t...
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6960256 |
Small crystals are made by mixing a solution of a desired substance with an anti-solvent in a fluidic vortex mixer in which the residence time is less than 1 s, for example 10 ms. The liquid within the fluidic vortex mixer ( 12 ) is subj...
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6821339 |
The invention relates to a process for the crystallization of substances having a narrow metastable supersaturation zone. In the process the saturation of a solution is gradually increased and the solution is seeded for the crystallizati...
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6818142 |
A solution comprising potassium hydrogen peroxymonosulfate containing an elevated level of KHSO 5 and having a weight ratio of SO 5 to SO 4 of greater than 1.0:1, and its use in microetching metal substrates is disclosed.
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6652822 |
Spherical and polyhedral particles of boron nitride and method of preparing them. Spherical and polyhedral particles of boron nitride are produced from precursor particles of hexagonal phase boron nitride suspended in an aerosol gas. The...
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6610267 |
The invention relates to a method for manufacturing a homogeneous and ammonium free calcium nitrate melt with high solidification temperature, suitable for conventional particulation methods, by mixing a potassium source with a calcium n...
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6541426 |
The present invention relates to a method to produce suspension concentrates of pesticides, pharmaceuticals, biocides, and similar materials, using a melt emulsification process. The method is particularly applicable to pesticides which ...
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6364920 |
CMP formulations comprising alumina particles and an iodate oxidizer can be stabilized against pH drift during use by acidification using an organic acid. Formulation pH stability can be further enhanced by treating the formulation at an...
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6333019 |
The invention relates to injection of fluids (gas, liquid, suspension or other mixtures) in a controlled typically uniform way within a vessel containing another fluid or fluidized medium. Said injection device consists of pipes or chann...
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6217622 |
A method of forming and classifying a precipitate containing large, coarse and fine particles from a super-saturated precipitating mother slurry, e.g. sodium aluminate from the Bayer process. The method comprises separating the precipita...
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6162263 |
Metal cyanide suitable for shipment is prepared by introducing an aqueous metal cyanide feed stream to a crystallizer to form a slurry of metal cyanide crystals in their mother liquor. The crystallization step occurs at a temperature bet...
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6159252 |
This invention relates to a process for the production of granulates by fluidized bed spray granulation and to a device for this purpose. Liquid starting materials may be converted into granulates by fluidized bed spray granulation. In o...
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6110438 |
The specification describes a method for producing black phosphorus from red phosphorus by thermally cycling red phosphorus in a vacuum between 360-400° C. and 200-240° C., whereupon the red phosphorous undergoes an allotropic phase ch...
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6056791 |
In a novel process for the production of particles or powders, a substance or mixture of substances to be treated is provided in a pressure vessel. A highly compressible fluid is dissolved under pressure in the substance or mixture of su...
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5969044 |
Process for airtight and/or moisture-proof packaging of air-sensitive and/or moisture-sensitive materials for the introduction of the packaged materials in a chemical reactor. Described is a process for the airtight and/or moisture-proof...
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5935275 |
A description is given of a process for producing weakly agglomerated, densified and/or crystallized nanosize particles which is characterized in that either (a) a suspension containing amorphous or partially crystalline nanosize part...
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5837211 |
Methods of reducing foam in Bayer process liquor are provided, said methods comprising adding a composition to the Bayer process liquor that comprises a tri(alkoxy alkyl) phosphate and a hydroxyl group containing carrier.
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5807410 |
The invention relates to a process for removing elemental sulfur which is present in a gas in the form of vapor and/or entrained particles, in which process the gas to be treated is cooled. The gas to be treated is introduced into a heat...
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5660599 |
Compacted ITO material is ground to a powder with particles in the size range of less than 500 μm, whereupon the powder thus obtained is molded into new target blanks, either alone or in a mixture with unused ITO powder, under the simul...
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5578285 |
A process for reducing the average particle size of an ammonium paratungstate powder having the steps of heating the ammonium paratungstate powder at a temperature of between about 110° C. to about 205° C. for a time sufficient to redu...
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5433932 |
In a process for recovering an alkali metal azide from a waste gas generating material containing the alkali metal azide and a metal oxide reactable with the azide, the gas generating material is mixed with a solvent for the alkali metal...
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5395806 |
A novel alkaline earth metal carbonate product for use as a raw material in the glass manufacturing process is disclosed. The alkaline earth metal carbonate becomes a part of the liquid phase in the glass furnace more readily and at a lo...
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5383940 |
Invention relates to a process of producing solid sodium cyanide. The process according to the invention is characterized in that an aqueous sodium cyanide solution (1) of 30 to 45% by mass, containing up to 5% by mass solids, is granula...
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5374766 |
This invention relates to a novel ester which presents as (CF 1) and a method for the production of the same as well as a process for hydrolysis and a method for the determination of an optical purity using this ester, and the object the...
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5366513 |
A method for preparing granulated alkaline earth metal carbonate, particularly barium carbonate or strontium carbonate, by adding a binding agent and optionally water; granulating the resulting mixture, preferably in the presence of wate...
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5346511 |
A method for defoaming a Bayer process liquor, the method comprising the steps of adding to the Bayer process liquor an effective amount of an antifoam/defoamer composition comprising a polyether surfactant and a polyhydric alcohol fatty...
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5336271 |
A method for increasing the proportion of a crystalline organic compound which remains amorphous and suppressing recrystallization in which a crystalline organic compound and a hydrophilic polymer substance are fixed onto a surface of co...
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5286470 |
The characteristics of compacted sodium silicate, in particular the attrition resistance,are improved by contacting the material with water in an agitated bed. A preferred route for adding moisture is the use of steam which gives efficie...
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5281242 |
A simple, efficient and inexpensive method of purifying magnesium sulfate from mixtures of epsomite and halite. The method allows for the preparation of substantially pure magnesium sulfate products. The method generally involves heating...
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5275793 |
The present invention describes a method and apparatus in which solid gelatin chunks are liquefied, tempered, and debubbled in a single operation. The debubbling step is accomplished by evacuating and sealing off the loaded solid reservo...
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5269817 |
A melt is crystallized by introducing the melt into a gap formed between two belts. The gap-forming flights of the belts travel in opposite directions. An upper one of the flights is cooled so that an upper surface of the melt crystalliz...
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5201923 |
The object of the present invention is to provide a stoichiometric B1-type tantalum nitride and a sintered body thereof. A B1-type tantalum nitride and a sintered body thereof, wherein a stoichiometric B1-type tantalum nitride is produce...
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5194067 |
A process is provided whereby the hydrogen peroxide-containing oxidate from methyl benzyl alcohol oxidation is extracted with water and with ethyl benzene extractive solvent and an aqueous hydrogen peroxide phase is separated from an eth...
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5169406 |
The invention concerns a method of preparing brine by dissolving salt in water, the salt containing sodium chloride but also calcium sulfate and/or other soluble impurities with a slower dissolution rate than sodium chloride, wherein the...
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5164263 |
Methods are described for preparing aluminum nitride of controllable morphology for ceramic and heat conduction applications. The methods comprise forming spherical particles or flakes of an intermediate, RAlNH, followed by heating the s...
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5160470 |
The present invention is a simple method for densifying colloidal silica. The method comprises feeding colloidal silica, recovered from a smelting process and having a density within a range of about 50 kg/m 3 to 300 kg/m 3 , by a nearl...
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5147412 |
The invention relates to a process in which a melt is mixed with, and emulsified in a colder aqueous phase at a temperature below the crystallization point of the molten compound, the melt only solidifying in the form of the dispersed pa...
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5087335 |
A process for cooling gaseous chlorine in which gaseous chlorine at elevated temperature and at a pressure of greater than 0.5 bar gauge, for example, up to 12 bar gauge, is cooled by directly contacting the gaseous chlorine with an aque...
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5066441 |
A process for treating calcium phosphate fine particles which includes the step of compacting the particles under pressure to form a sheet.
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5011819 |
A process is disclosed for the formation of a uniform and homogeneous mixture of a plurality of compounds in a desired stoichiometric ratio as a precipitate from a fluid under supercritical processing conditions which comprises dissolvin...
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4938946 |
A manufacturing plant and process for production of hydrogen on the moon uses lunar minerals as feed and a minimum of earth-imported, process materials. Lunar feedstock is the pulverized surface layer of lunar soil known as regolith. The...
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4908197 |
Methods are described for preparing aluminum nitride of controllable morphology for ceramic and heat conduction applications. The methods comprise forming spherical particles or flakes of an intermediate, RA1NH, followed by heating the s...
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4902301 |
A process for manufacturing, shipping and unloading substantially solid, ice-like sodium cyanide dihydrate containing essentially no liquid water. A slurry of 58 weight percent or higher sodium cyanide is rapidly cooled to the anhydrous/...
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4897085 |
A process is provided whereby the hydrogen peroxide-containing oxidate from methyl benzyl alcohol oxidation is contacted with ethyl benzene extractive solvent and a hydrogen peroxide phase is separated from a solvent phase which also con...
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4888308 |
A glass manufacturing process using a granular, free-flowing form of alkaline earth metal carbonate, e.g., barium or strontium carbonate, is disclosed. The alkaline earth metal carbonate has a relatively high bulk density and is made wit...
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4888161 |
A method of converting fine particle size alkaline earth metal carbonate, e.g., barium or strontium carbonate, into a free-flowing granular form with relatively high bulk density, without sintering, grinding, or briquetting, is disclosed...
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4877595 |
Pyrogenically prepared silicic acid is compressed by a rotary filter equipped with a pressing band.
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4849194 |
The crystallization of a crystalline silicate product from an crystallization mixture is monitored by measuring the specific electrical conductivity of the mixture. The crystallization of metallosilicates, such as aluminosilicate zeolite...
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