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| Number | Title | Issue Date |
| 7179435 | Method and apparatus for recovering a pure substance from an impure solution by crystallization The invention relates to an apparatus for the purification of a substance from a solution, a suspension or a mixture of liquids by crystallization, preferably in a continuous manner. The apparatus comprises a first crystallizer (1c) comprising an input... | 02/20/2007 |
| 6916455 | Protein crystallography prescreen kit A kit for prescreening protein concentration for crystallization includes a multiplicity of vials, a multiplicity of pre-selected reagents, and a multiplicity of sample plates. The reagents and a corresponding multiplicity of samples of the protein in solutions of v... | 07/12/2005 |
| 6767520 | Cooling system for polymer processing A system for the solid phase polymerization of polymers wherein cold amorphous polymer is introduced to one or more crystallizers and heated to crystallize the polymer. The crystallized polymer is discharged to a reactor for polymerization of the polymer, and the ho... | 07/27/2004 |
| 6703479 | Process and apparatus for cooling polymer in a reactor A process and apparatus is disclosed for heating or cooling polymer solids in a dispensing section of a solid-state polycondensation reactor. Gas is delivered to the dispensing section of the reactor in which it cools polymer solids in the dispensing sect... | 03/09/2004 |
| 6355218 | Crystallizer with cooling element and sweeping element with sweeping parts, and sweeping element and sweeping part for such a crystallizer A crystallizer comprising an elongate housing with a drivable shaft extending in the longitudinal direction of the housing, at least one cooling element being placed astride on the shaft, which cooling element to that end has a slotted recess, the cooling... | 03/12/2002 |
| 6315967 | Crystallizing process A process for crystallizing a thermoplastic preform or container which utilizes a preheated plug to provide the sole upright support for a workpiece in the crystallizing process. The preheated plug aids in the crystallization process by applying heat to t... | 11/13/2001 |
| 6310239 | Process for manufacturing terephthalic acid This invention relates to a process for manufacturing terephthalic acid and more particularly, to a process for manufacturing and recovering the highly purified terephthalic acid, in accordance with the practice of this invention comprising the following ... | 10/30/2001 |
| 6139811 | EFG crystal growth apparatus A new EFG (Edge-defined Film-fed Growth) crucible/die configuration is provided which (a) overcomes the tendency for silicon feed material to form a solid mass near the center hub region in the hot-zone during the crystal growth and (b) prevent the crucib... | 10/31/2000 |
| 6080374 | Centrifugal crystallization refining apparatus An apparatus for performing centrifugal crystallization of organics, which unifies all the individual steps for the removal of impurities into a single operation. The apparatus consists of two coaxial rotors and stationary parts. A crystallizable feed sto... | 06/27/2000 |
| 5961935 | Method and apparatus for preparing purified terephthalic acid A method and apparatus for purifying crude terephthalic acid from a liquid dispersion thereof also containing impurities selected from unreacted starting materials, solvents, products of side reactions and/or other undesired materials is provided. The met... | 10/05/1999 |
| 5830418 | Method of using ultrasound to promote crystallization of solid substances contained in a flowable material A flowable material, such as a supercooled melt or supersaturated solution, is dispensed onto a take-up member such as a belt or drum. Either prior to, or after being dispensed onto the take-up member, the material is exposed to ultrasound to promote the ... | 11/03/1998 |
| 5700435 | Method and apparatus for separating a substance from a liquid mixture by fractional crystallization The crystalliser (70) has an inlet (77) for the crystal medium to be fractionated and an outlet (84) from which the mother liquor followed by the molten crystals can be withdrawn at the end of the crystallisation process. During the crystallisation proces... | 12/23/1997 |
| 5662870 | Fluid bed cooling system for polymer processing A system for the solid phase polymerization of polymers wherein cold amorphous polymer is introduced to a crystallizer and heated to crystallize the polymer, the crystallized polymer is discharged to a reactor to achieve polymerization of the polymer, and... | 09/02/1997 |
| 5593496 | Slurry crystallization method using bubbles directed at a heat exchanger A surface-cooled fluid bed crystallizer apparatus and method are disclosed wherein submerged heat exchanger surfaces (typically heat exchanger tubes or plates through which a coolant is passed) are bathed with a stream of gas bubbles (preferably air). The... | 01/14/1997 |
| 5523064 | Crystallization apparatus A surface-cooled fluid bed crystallizer apparatus and method are disclosed wherein submerged heat exchanger surfaces (typically heat exchanger tubes or plates through which a coolant is passed) are bathed with a stream of gas bubbles (preferably air). The... | 06/04/1996 |
| 5500189 | Apparatus for crystallization of organic matter Adiabatic self-evaporation cooling of a refrigerant is performed in a crystallizer for a treated organic matter which contains the refrigerant and is fed into the crystallizer. Crystals produced by the adiabatic self-evaporation cooling are withdrawn from... | 03/19/1996 |
| 5338519 | Process and apparatus for separating substances by crystallization A process is provided for the separation of substances by melt crystallization. The organic mixtures which are difficult to crystallize are heated to a temperature sufficient to obtain a melt with the melt then being moved through a three-dimensional crys... | 08/16/1994 |
| 5230769 | Process and apparatus for separating substances by crystallization A process is provided for the separation of substances by melt crystallization. The organic mixtures which are difficult to crystallize are heated to a temperature sufficient to obtain a melt with the melt then being moved through a three-dimensional crys... | 07/27/1993 |
| 5178840 | Single wafer regrowth of silicon A wafer chuck is used to support a circular silicon wafer, which was formed from a single wafer casting process, in order to perform monocrystalline silicon regrowth. The cast wafer, having a monocrystalline silicon seed, located at its center, rests atop... | 01/12/1993 |
| 5133829 | Single wafer regrowth of silicon A wafer chuck is used to support a circular silicon wafer, which has formed from a single wafer casting process, in order to perform monocrystalline silicon regrowth. The cast wafer, having a monocrystalline silicon seed, located at its center, rests atop... | 07/28/1992 |
| 5127921 | Multistage recrystallization for superpurifying crystallizable substances A method and apparatus are provided for superpurifying crystallizable substances to a purity level of 99.999 percent. Included is controlling the reflux ratio by controlling and/or metering transfers of crystals and mother liquor at selected locations and... | 07/07/1992 |
| 5089082 | Process and apparatus for producing silicon ingots having high oxygen content by crucible-free zone pulling, silicon ingots obtainable thereby and silicon wafers produced therefrom Silicon ingots, in particular, with diameters of approximately 75 mm and greater, can be produced by zone pulling with an oxygen content comparable to crucible-pulled material if a flat quartz element is brought into contact with the molten cap during the... | 02/18/1992 |
| 5034199 | Zone melt recrystallization apparatus The improved zone-melt recrystallization apparatus is comprised of a port system for providing a thermal barrier between the recrystallization chamber and the loader assembly. A bellows system is used to lift a plurality of pins that support a silicon waf... | 07/23/1991 |
| 4978509 | Lamella settler crystallizer A crystallizer which incorporates a lamella settler and which is particularly applicable for use in batteries and power cells for electric vehicles or stationary applications. The lamella settler can be utilized for coarse particle separation or for agglo... | 12/18/1990 |
| 4891191 | High efficiency column crystallizer An improved countercurrent solid-liquid contacting apparatus, and more particularly an improved counter-current crystallizer column is disclosed. The present invention embraces the discover that column efficiency and product purity can be substantially en... | 01/02/1990 |
| 4891190 | Incrustation resistive crystallizer employing multifrequency vibrations An incrustation resistive crystallizer apparatus is disclosed. The crystallizer housing has conduit means for ingress of solution to be crystallized, separate conduit means for ingress and egress of cooling fluid, means for recovery of mother liquor and p... | 01/02/1990 |
| 4806318 | Apparatus for purifying crystals An apparatus for purifying crystals comprises a crystal purifying tower having a transverse cross-section of two partially overlapping circles, stirrers each comprising a rotational shaft passing through the center of each of the circles and having blade ... | 02/21/1989 |
| 4743434 | Apparatus for treatment of suspended particles with a liquid in countercurrent An apparatus for treating in counter current of suspended particles with a liquid, whereby the particles and the liquid are transferred in opposite directions through a contact zone which, at some places, spaced in axial direction, is stirred in planes pe... | 05/10/1988 |
| 4735781 | Apparatus for concentrating a suspension An apparatus for concentrating a suspension consisting of a hollow cylinder in which one or more tubes of a constant outward diameter extend in axial direction, in the wall of each tube at least one filter being mounted forming the only direct connection ... | 04/05/1988 |
| 4727218 | Procedure and means for separating or purifying organic substances Method and apparatus for separating and/or purifying a substance from a molten mixture by crystallization, in which the molten mixture is conducted into an annular space defined by two substantially curvilinearly-shaped surfaces, one of the surfaces being... | 02/23/1988 |
| 4711697 | Method for investigating the formation of crystals in a transparent material A method of observing crystal formation in a transparent specimen (58 of FIG. 5) comprising the steps of melting a portion of the specimen in a heating zone (22 of FIG. 2) freezing the melted portion of the specimen 58 by a cooling zone (20 of FIG. 2) spa... | 12/08/1987 |
| 4623372 | Crystallization process An improved crystallization process is disclosed for separating a crystallizable material and an excluded material which is at least partially excluded from the solid phase of the crystallizable material obtained upon freezing a liquid phase of the materi... | 11/18/1986 |
| 4597768 | Method for treatment in counter current of suspended particles with a liquid A method for treating in counter current of suspended particles with a liquid, whereby the particles and the liquid are transferred in opposite directions through a contact zone which, at some places, spaced in axial direction, is stirred in planes perpen... | 07/01/1986 |
| 4588562 | Apparatus for purifying crystals Crystals containing a molten liquid at the bottom of a purifying tower are cooled, so that three effects i.e., washing, sweating and recrystallization are improved while maintaining a heat balance within a tower to thereby obtain highly pure crystals. The... | 05/13/1986 |
| 4481169 | Washing column A washing column for the continuous separation between a solid chemical fed in a liquid multi-component system, on the one hand, and the mother liquor in which the solid chemical is suspended, on the other. In a cylindrical working space a stationary, st... | 11/06/1984 |
| 4400189 | Pulsed crystallization column and method of countercurrent crystallization In a multistage countercurrent crystallization apparatus for multistage crystallization by adiabatic recrystallization and extractive washing comprising a vertical column containing a feed line, a waste material discharge, a purified product discharge, a ... | 08/23/1983 |
| 4312846 | Method of silicon purification A method for purifying silicon comprises the steps of providing a body of molten silicon-rich material in a vessel having an upwardly removable first bottom therein and extracting heat therefrom to provide a solid phase containing silicon in crystal form ... | 01/26/1982 |
| 4309878 | Process and apparatus for separating and purifying a crystalline material An apparatus and process for purifying and separating a crystalline compound from its impurities in a slurry containing same, said process comprising introducing said slurry under pressure into a cylindrical pressurized filter-washer having a substantiall... | 01/12/1982 |
| 4248601 | Process for reducing the sodium chloride content of a potassium salt A process for reducing the sodium chloride content of crystalline potassium salts without the use of successive recrystallization. The crystalline potassium salts having a sodium chloride content greater than about 0.8 percent by weight are subjected to c... | 02/03/1981 |
| 4235796 | Process for fractional crystallization of lipids Crystallizable lipid is fractionally crystallized from a fugitive solvent therefor in a crystallization zone wherefrom a washed crystal containing slurry substantially depleted in liquid lipid is withdrawn and the crystals are separated from such washed s... | 11/25/1980 |
