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| Number | Title | Issue Date |
| 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 column and/or by means of the flow rate of the suspension conducted into... | 12/29/2009 |
| 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 substance to be granulated, having a free surface (P) substanti... | 10/21/2008 |
| 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 supersaturated, and subjecting the solution to irradiation by high intensity ultra... | 04/15/2008 |
| 7351394 | Method for producing α-alumina powder A method for producing an α-alumina powder is described. The method for producing an α-alumina powder comprises a step of calcining an aluminum salt in the presence of a seed crystal at 600-890° C. ... | 04/01/2008 |
| 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 ε-caprolactam obtained by cyclizing hydrolysis of aminocapronitrile. Th... | 09/18/2007 |
| 7180068 | Scintillation materials with reduced afterglow and method of preparation Scintillation materials of this invention have an alkali halide host material, a (first) scintillation dopant of various types, and a variety of second dopants (co-dopants). In another embodiment, the scintillation materials of this invention have an alkali halide h... | 02/20/2007 |
| 7122249 | Abrasion-resistant agglomerate mineral substance granule, powder comprising such granules and production method therefor Granule comprising an agglomerate of particles of a mineral substance. The agglomerate is coated with a monolithic outer layer, which provides it with improved abrasion resistance. Powder comprising granules according to the invention. Process for manu... | 10/17/2006 |
| 7115243 | Method for preparing α-alumina nano powder The present invention relates to a preparation method of α-alumina nano powder, and more particularly to a preparation method of α-alumina nano powder that has a uniform particle shape and size distribution, is capable of being produced at a low temperature, and c... | 10/03/2006 |
| 7094505 | Photomask assembly and method for protecting the same from contaminants generated during a lithography process A photomask assembly and method for protecting the photomask assembly from contaminants generated during a lithography process are disclosed. A photomask assembly includes a pellicle assembly formed from a pellicle frame and a pellicle film coupled to a first surfac... | 08/22/2006 |
| 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 agitation tank, wherein the auxiliary heat transfer means is constant... | 03/14/2006 |
| 7008599 | High throughput crystal form screening workstation and method of use A filtration assembly operable in connection with a crystal form screening workstation that provides for automated crystal form screening is disclosed. The assembly includes first and second valves, with each valve having an internal passage and first, second and th... | 03/07/2006 |
| 7005072 | Method for removing phosphorus from waste lagoon effluent An apparatus and method for removing phosphorus from a wastewater effluent stream from a hog waste lagoon. The wastewater effluent is introduced to the bottom of an inverted cone-shaped continuous crystallizer including a fluidized bed of struvite therein. An effect... | 02/28/2006 |
| 6994782 | Apparatus for removing phosphorus from waste lagoon effluent An apparatus and method for removing phosphorus from a wastewater effluent stream from a hog waste lagoon. The wastewater effluent is introduced to the bottom of an inverted cone-shaped continuous crystallizer including a fluidized bed of struvite therein. An effect... | 02/07/2006 |
| 6926868 | Continuous slurry polymerization volatile removal A process/apparatus is disclosed for continuously separating a liquid medium comprising diluent and unreacted monomers from a polymerization effluent of a slurry loop reactor containing a flow of slurry therein, comprising a discharge conduit extending a distance in... | 08/09/2005 |
| 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 a dispersion of either (i) seed crystals of the mineral salt in an aq... | 04/19/2005 |
| 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 formed; (b) the emulsion is super-saturated in the substance; (c) cryst... | 02/15/2005 |
| 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 less, a silicon seed crystal which is used for the Czochrals... | 12/30/2003 |
| 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 oxide doped with metal ions as a third component, methods for ... | 07/08/2003 |
| 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 unseeded suspension of human insulin, the suspension being free... | 05/20/2003 |
| 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 of the supersaturated solution upwardly through successivel... | 11/12/2002 |
| 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 brine solution of the compound under conditions in which ... | 10/15/2002 |
| 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 and supersaturated, characterized in that the emulsion is... | 08/06/2002 |
| 6383233 | Separation process A process is described for separating a desired substance from an aggregate mixture in which process a three-phase dispersion is formed, the first phase comprising droplets phase comprising a liquid transport phase, and the third phase comprising a surfac... | 05/07/2002 |
| 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 crystallization, the temperature of the slurry is periodically varied... | 04/02/2002 |
| 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. The tube baffle is provided with a crystallization portion i... | 01/01/2002 |
| 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 particular racemates.... | 11/13/2001 |
| 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 chloride dihydrate transition temperature, a stock of a pow... | 07/31/2001 |
| 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 be positioned around a free end of a silicon element to hea... | 06/26/2001 |
| 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 | 06/26/2001 |
| 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 NaOH.3.5H2 O and the cryst... | 09/05/2000 |
| 6106794 | Process for the preparation of sodium fluoride Process for the preparation of sodium fluoride from sodium hydroxide solution and hydrogen fluoride, characterized in that at least 45% strength by weight, in particular 50% strength by weight, sodium hydroxide solution and anhydrous hydrogen fluoride are... | 08/22/2000 |
| 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; allowing aluminum fluoride particles to be precipitated under ... | 06/27/2000 |
| 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 supersaturated sodium aluminate solution which is being recycled in... | 11/16/1999 |
| 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 yttrium salt, e.g., nitrate, and urea dissolved therein in spe... | 03/09/1999 |
| 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 have been applied in the form of a seed crystal layer, and su... | 09/29/1998 |
| 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 Nd | 07/07/1998 |
| 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 crystals suspended therein, is applied, prior to the crystalli... | 05/26/1998 |
| 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 AlF3.3H.sub.2 O containing not more than 5% of fine particle 40 μm or less in diameter is added into the super-sa... | 01/13/1998 |
| 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 and a first stream of aluminum trihydroxide particles as seed p... | 11/25/1997 |
| 5575923 | Salt basket for crystallizer and method of use in zero liquid discharge industrial facilities An improved salt basket for dewatering solids, particularly salts resulting from evaporation of industrial wastewaters. The salt basket system includes a pressurizable vessel having a screen floor situated above a bottom liquid collection head, an inlet f... | 11/19/1996 |
