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8178066 |
Method for stabilizing calcium phosphates fine particles, method for manufacturing calcium phosphates fine particles by using the method, and use thereof
The present invention provides a method for stabilizing fine particles of calcium phosphates without lowering their solid phase forming activity. It is possible to stabilize the fine particles of...
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7820057 |
Method for removing at least one constituent from a solution
The invention relates to a method for removing at least one constituent from a solution, comprising:—forming a liquid mixture by bringing together said solution (1) and a particulate seed m...
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7763223 |
Method for manufacturing porous silica crystal
In a synthetic method for porous silica crystals through a hydrothermal reaction, a method for synthesizing porous silica crystals with a size of 0.5 mm or larger in high reproducibility and...
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7736614 |
Process for removing aluminum and other metal chlorides from chlorosilanes
A process for removing aluminum and other metal chlorides from liquid chlorosilanes with the steps of: introducing a source of seed into a source of impure liquid chlorosilanes, initiating the...
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7637965 |
Process for controlling a hydraulic wash column
A process for operating a hydraulic wash column, in which the position of the buildup front in the wash column is positioned by means of the flow rates of control liquor conducted into the wash...
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7520932 |
Method of analyzing carbon concentration in crystalline silicon
A method of analyzing carbon concentration in crystalline silicon includes providing a section from a zoned and annealed silicon core. The zoned and annealed core is extracted from a...
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7438729 |
Fluid bed granulation process
In order to produce granules granulometrically polidispersed in a very little range, a fluid bed granulation process of the type comprising the steps of preparing a fluid bed of seeds (S1) of the...
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7357835 |
Production of crystalline materials by using high intensity ultrasound
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...
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7270752 |
Process for purifying lactams
A process is described for purifying lactams, in particular the lactams obtained by cyclizing hydrolysis of an aminoalkylnitrile, and more particularly to the purification by crystallization of...
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7011708 |
Heat transfer device
A device includes an agitation tank, a liquid circulation means for circulating a liquid along a tank wall of the agitation tank, and at least one auxiliary heat transfer means provided inside the...
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6881231 |
Reduction in mineral salt deposition
A composition for reducing deposition of a mineral salt from an aqueous supersaturated solution onto a solid surface in contact with the aqueous supersaturated solution which composition comprises...
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6855176 |
Emulsion crystallisation with recycle
A method for purifying substances through emulsion crystallisation is described, whereby (a) an emulsion of organic liquid droplets in a continuous water phase containing the impure substance is...
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6670036 |
Silicon seed crystal and method for producing silicon single crystal
There are disclosed a silicon seed crystal which is composed of silicon single crystal and used for the Czochralski method, wherein oxygen concentration in the seed crystal is 15 ppma (JEIDA) or...
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6589906 |
Methods for producing oxides or composites thereof
Disclosed are methods for producing films of a composite comprising a metal oxide in combination with one or more other oxides or metals as a third component, or a composite comprising a metal...
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6566490 |
Seeding crystals for the preparation of peptides or proteins
Disclosed is a method for producing seeding microcrystals for the production of human insulin, the microcrystals being free of non-human pancreatic insulin, the method comprising providing an...
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6478828 |
Process for the crystallization of an inorganic substance
A process for crystallization of an inorganic substance includes preparing a supersaturated solution of the inorganic substance to be crystallized in a solvent which is a liquid; forcing a stream...
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6464736 |
Recrystallization process
The present invention provides a process for producing crystals of a polymorphic compound in a first crystal structure by introduction of the compound in a second crystal structure into a saturated...
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6428583 |
Separation process
A crystallization process is described for separating a desired substance from an aggregate mixture in which an emulsion of droplets in a continuous phase containing the aggregate mixture is formed...
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6364914 |
Method of crystallization with the particle size distribution being controlled
Herein is disclosed a method of crystallization with the particle size distribution being controlled, characterized in that while crystals are being precipitated by vacuum concentration...
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6334878 |
Apparatus and method for crystallization
An apparatus for crystallization, which contains a crystallization vessel, a seed supplying device, a feed solution supplying device and a tube baffle disposed within the crystallization vessel....
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6315966 |
Crystallization process and device
Continuously operated, two-part crystallizer which is particularly suitable for the resolution of racemic mixtures, and process for separating solid mixtures which are difficult to separate, in...
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6267789 |
Method for enriching raw salt
Process for enriching crude salt, in which the crude salt is ground and then cooled in a saturated aqueous sodium chloride solution, to a temperature below the anhydrous sodium chloride to sodium...
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6251182 |
Susceptor for float-zone apparatus
The present invention is an improved susceptor for a float-zone apparatus for the float-zone processing of silicon elements. The susceptor is of a cylindrical design which allows the susceptor to...
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6251358 |
Process for the preparation of sodium fluoride
Process for the preparation of sodium fluoride from sodium hydroxide solution and hydrogen fluoride or hydrofluoric acid, characterized in that <45% strength by weight, preferably 20 to 40%...
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6113657 |
Purification of caustic soda
In a process for preparing crystalline NaOH.3.5H2 O, NaOH.3.5H2 O is allowed to crystallize from an aqueous sodium hydroxide solution which contains sodium chloride and is saturated in respect of...
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6080210 |
Process for producing aluminum fluoride particles
A process for producing aluminum fluoride particles having a smooth surface, comprising the steps of adding aluminum fluoride seed crystals to a super-saturated solution of aluminium fluoride;...
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5985165 |
Process for the purification of aluminum hydroxide and process for the surface treatment of aluminum plate utilizing the purification process
The present invention allows the reproduction of a crystalline aluminum hydroxide having a high particle strength and a high purity which can find wide application such as abrasive from a...
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5879647 |
Method for the preparation of fine globular particles of yttrium oxide
An improvement is proposed in the so-called urea method for the preparation of fine particles of yttrium oxide, according to which, while an aqueous reaction mixture containing a water-soluble...
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5814231 |
Separation of liquid eutectic mixtures by crystallization on cold surfaces and apparatus for this purpose
A process for separating a liquid eutectic mixture by crystallization of one eutectic forming substance of the mixture on a cold surface to which seed crystals of the eutectic forming substance...
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5776864 |
Large single domain 123 material produced by seeding with single crystal rare earth barium copper oxide single crystals
A method of fabricating bulk YBa2 Cu3 Ox where compressed powder oxides and/or carbonates of Y and Ba and Cu present in mole ratios to form YBa2 Cu3 Ox are heated in the presence of a Nd1+x Ba2-x...
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5755975 |
Separation of substances from a liquid mixture by crystallization
In a process for separating substances from a liquid mixture by crystallization in a crystallizer, a two-phase seed layer in the form of a melt or solution of the mixture to be separated, with...
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5707406 |
Method of manufacturing aluminum fluoride anhydride
A method of manufacturing aluminum fluoride anhydride by means of a wet method. This method is featured in that a seed crystal of AlF3.3H2 O containing not more than 5% of fine particle 40 μm or ...
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5690700 |
Process for the precipitation of aluminum trihydroxide from a supersaturated sodium aluminate solution
A process for the precipitation of aluminum trihydroxide from a supersaturated sodium aluminate solution, comprising the steps of (a) supplying a stream of supersaturated sodium aluminate solution...
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5503641 |
Process and apparatus for preparing a potassium chloride mixture
A potassium chloride mixture with grains of different sizes is extracted in a first stage with an unsaturated solution at an elevated temperature, whereby the finest grains are completely dissolved...
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5445805 |
Large potassium bicarbonate crystals and process for the preparation thereof
A large size, small surface area, granular crystalline potassium bicarbonate product suitable for application as an active ingredient in pharmaceutical oral unit dosage forms useful for the...
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5168096 |
Method for preparing an oriented and textured magnetic material
A method for preparing an oriented and textured magnetic compound, comprising the steps of preparing a composition at a temperature such that it comprises crystallites of the compound in the...
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5163973 |
Process for producing low soda alumina
In a process for precipitating alumina hydrate from a stream of Bayer process liquor, wherein the stream is first divided into a major portion and a minor portion, the minor portion fed to an...
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5158577 |
Process for precipitating alumina from Bayer process liquor
An improved process for precipitating alumina from Bayer process liquors is disclosed. The process involves dividing an incoming pregnant liquor stream into a minor portion of about 10 to about 25%...
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5123997 |
Plenum type crystal growth process
Crystals are grown in a tank which is divided by a baffle into a crystal growth region above the baffle and a plenum region below the baffle. A turbine blade or stirring wheel is positioned in a...
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5076853 |
Method and apparatus for the preparation of anhydrous crystalline dextrose
A mass constituted by glucose syrup and anhydrous dextrose crystals is led to pass through from top to bottom and with malaxation of crystallization zone 1 of axis preferably substantially vertical...
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4931101 |
Method and installation for the preparation of anhydrous crystalline dextrose
A mass constituted by glucose syrup and anhydrous dextrose crystals is led to pass through from top to bottom and with malaxation a crystallization zone 1 of axis preferably substantially vertical...
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4853066 |
Method for growing compound semiconductor crystal
A method and an apparatus for growing a crystal of a compound semiconductor, in which a heater, used to heat a boat for growing the semiconductor crystal, is disposed around an ampule containing...
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H000560 |
Method of manufacturing dislocation and etch channel free quartz resonator blanks
Dislocation and etch channel-free quartz resonator blanks are made from a cultured quartz stone by visualizing the dislocation-free areas of the cultured quartz stone by X-ray topography, cutting...
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4787985 |
Multi-stage purification unit process
A counter-current process for purifying chemicals using cyrstal purification. The unit process has a purification and recovery section which contain substantially identical stages. In operation,...
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4784715 |
Methods and apparatus for producing coherent or monolithic elements
Methods and apparatus for producing coherent or monolithic elements, such as mono-crystalline semi-conductor rods, preferably by growing or drawing one or more such elements upwardly from an...
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4747917 |
Scale-free process for purifying concentrated alkali metal halide brines containing sulfate ions as an impurity
A process for reducing sulfate ion concentrations in an alkali metal halide brine to be electrolyzed in an electrolytic cell comprises feeding the alkali metal halide brines to a reaction zone...
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4747906 |
Process and apparatus for purifying silicon
Crude silicon is purified by melting the crude silicon, maintaining the molten silicon above the solidification temperature thereof in an inert gas atmosphere, and rotating a hollow rotary cooling...
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4690809 |
Process for the preparation of asbestiform crystalline calcium sodium metaphosphate fibers
Asbestiform crystalline calcium sodium metaphosphate fibers are prepared by (a) forming a homogeneous melt of substantially crystalline calcium sodium metaphosphate having a composition on a dry...
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4666456 |
Process for the continuous partial crystallization and the separation of a liquid mixture
Process for continuous crystallization of a liquid mixture in which the mixture is led through a cascade of cooling sections. The temperature in the first section is such that a part of the mixture...
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4666687 |
Method and apparatus for decomposing sodium aluminate liquors without agitation to produce alumina
The invention concerns a method and apparatus for decomposing a sodium aluminate liquor supersaturated with alumina, obtained from alkaline action on bauxite by the Bayer process, decomposition...
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