Hydraulic Classifier With Crystallizer Patents (Class 422/252)
  • Patent number: 9254452
    Abstract: To provide a crystallization device with a simple structure and high classification performance in crystallization at a center part of an upper part in a vertical container having a classification leg on a bottom portion, rotor blade unit for generating a swirling flow of a raw material liquid of a suspension slurry in the container along an inner circumferential surface of the container is provided, and at a center part on a bottom surface of the container, liquid-flow direction changing unit for causing the raw material liquid to flow upward at the center part of the container is provided, and the liquid-flow direction changing unit is formed of baffles, each being made of a band-shaped plate, provided radially on the bottom surface.
    Type: Grant
    Filed: July 17, 2012
    Date of Patent: February 9, 2016
    Assignees: SATAKE CHEMICAL EQUIPMENT MFG LTD., HADO CO., LTD.
    Inventor: Yoshikazu Kato
  • Patent number: 8702863
    Abstract: A method for the evaporative production of phenol-BPA adduct crystals in a crystallizer is provided. First, a supersaturated BPA solution is introduced into a crystallizer that includes a cylindrical vessel and a concentrically-disposed draft tube that defines an annular space between the vessel and tube. Next, the BPA solution is circulated through the draft tube and annular space while a coolant is uniformly distributed in the circulating flow by radially injecting a volatile hydrocarbon compound at between about 30% and 60% of a radial extent of the annular space of to form a BPA mixture. Phenol-BPA adduct crystals are produced in the vessel by evaporating the volatile hydrocarbon compound out of the BPA mixture. The method provides a consistent and uniform concentration of coolant across the surface of the boiling zone that prevents or at least reduces unwanted crystal nucleation.
    Type: Grant
    Filed: March 1, 2013
    Date of Patent: April 22, 2014
    Assignee: Badger Licensing LLC
    Inventor: Stephen W. Fetsko
  • Patent number: 8431084
    Abstract: A crystallizer for the evaporative production of phenol-BPA adduct crystals is provided that achieves more uniform crystal growth while suppressing undesired crystal nucleation. The crystallizer includes a cylindrical vessel; a draft tube concentrically disposed within the cylindrical vessel such that an annular space is defined between the vessel and tube; an impeller that circulates liquid in the vessel through the draft tube and the annular space, and a plurality of nozzles mounted around an inner wall of said cylindrical vessel that introduce an evaporative coolant into the vessel. Each of the nozzles includes a discharge end disposed between about 30% and 60% of a radial extent of the annular space, and is located below an upper end of the draft tube a distance of between about 50% to 150% of the diameter of the vessel. Such a nozzle arrangement provides a consistent and uniform concentration of coolant across the surface of the boiling zone that prevents or at least reduces unwanted crystal nucleation.
    Type: Grant
    Filed: June 23, 2010
    Date of Patent: April 30, 2013
    Assignee: Badger Licensing LLC
    Inventor: Stephen W. Fetsko
  • Publication number: 20100183489
    Abstract: A crystallizer for crystallizing solute contained in a solution has first (2) and second (1) communicating chambers, for the solution, and a heat exchanger (20) for keeping a state of supersaturation therein. A first circuit extracts from a calm zone (15) of the latter chamber a first stream of liquid containing small crystals and recycles this stream into the first chamber. A second circuit extracts from the second chamber a second stream of liquid containing coarse crystals and brings this second stream into the first chamber. The downstream end (26) of the first circuit runs into the second circuit so that the first and second liquid streams are made to flow in the same direction into said second circuit.
    Type: Application
    Filed: June 23, 2008
    Publication date: July 22, 2010
    Applicant: CRYSTAL-EVAP CONSULT
    Inventor: Michel Malfand
  • Patent number: 7540884
    Abstract: A process for purifying removal of crystals from their suspension in mother liquor by means of a washing column having forced transport in which the process chamber is encased by a metal wall which, on its side facing away from the process chamber, is heated at least along the length of the pure melt zone.
    Type: Grant
    Filed: November 8, 2002
    Date of Patent: June 2, 2009
    Assignee: BASF Aktiengesellschaft
    Inventors: Ulrich Hammon, Dieter Baumann, Joerg Heilek, Klaus Joachim Mueller-Engel, Bernd Eck
  • Patent number: 7510690
    Abstract: A crystallization system is provided comprising a trial generation station configured to generate crystallization trials in trial zones of a crystallization plate; an imaging station configured to take images of crystallization trials in the crystallization plate; a transport mechanism configured to transport the crystallization plate to the imaging station after generation of the crystallization trials; and a controller including logic for causing the trial generation station to generate the crystallization trials in the crystallization plate, logic for causing the transport mechanism to transport the crystallization plate to the imaging station and logic for causing the imaging station to take images of the crystallization trials.
    Type: Grant
    Filed: December 16, 2004
    Date of Patent: March 31, 2009
    Assignee: Takeda San Diego, Inc.
    Inventors: Laurent Martin, John W. Palan
  • Patent number: 7452419
    Abstract: A method is provided for operating a crystallization system comprising identifying a screen storage plate from among the plurality of screen storage plates stored in a screen storage station, each screen storage plate having a plurality of wells that contain a screen solution and at least a portion of the screen storage plates having a selection of screen solutions that is different from the selection of screen solutions held in other screen storage plates; having a transport mechanism transport the identified screen storage plate to a screen replicator; transporting a plurality of crystallization plates to the screen replicators; and having the screen replicator transfer the screen solutions from the identified screen storage plate to the plurality of crystallization plates.
    Type: Grant
    Filed: December 16, 2004
    Date of Patent: November 18, 2008
    Assignee: Takeda San Diego, Inc.
    Inventors: Laurent Martin, John W. Palan
  • Patent number: 7435397
    Abstract: A crystallization system is provided comprising a screen generation station; a screen storage station; including a housing configured to store a plurality of screen storage plates and mechanics for retrieving a selected screen storage plate from among the plurality of screen storage plates for transport to another station a transport mechanism configured to transport a screen storage plate containing the screen solutions generated at the screen generation station to the screen storage station; and a controller.
    Type: Grant
    Filed: December 16, 2004
    Date of Patent: October 14, 2008
    Assignee: Takeda San Diego, Inc.
    Inventors: Laurent Martin, John W. Palan
  • Patent number: 7431769
    Abstract: A method is provided that comprises generating a screen storage plate that contains screen solutions at a screen generation station; employing a transport mechanism to transport the screen storage plate from the screen generation station to a screen storage station; storing the screen storage plate in the screen storage station among a plurality of screen storage plates; having the screen storage station retrieve screen storage plate from among the plurality of screen storage plates stored within the screen storage station; and having a crystallization trial generation station generate crystallization trials in a crystallization plate incorporating the screen in the retrieved screen storage plate; wherein the method is performed in a single automated system.
    Type: Grant
    Filed: December 16, 2004
    Date of Patent: October 7, 2008
    Assignee: Takeda San Diego, Inc.
    Inventors: Laurent Martin, John W. Palan
  • Patent number: 7431768
    Abstract: A crystallization system is provided comprising: a screen replicator configured to transfer screen solutions from wells of a screen storage plate into well regions of multiple crystallization plates; a trial generation station configured to generate crystallization trials in the trial zones of a crystallization plate; a transport mechanism configured to transport crystallization plates from the screen replicator to the trial generation station; and a controller having logic for causing the screen replicator to transfer the screen solutions from the screen storage plate to multiple crystallization plates, logic for causing the transport mechanism to transport the crystallization plates from the screen replicator to the trial generation station and logic for causing the trial generation station to generate crystallization trials in the crystallization plates.
    Type: Grant
    Filed: December 16, 2004
    Date of Patent: October 7, 2008
    Assignee: Takeda San Diego, Inc.
    Inventors: Laurent Martin, John W. Palan
  • Patent number: 7416710
    Abstract: A crystallization system is provided that comprises a screen replicator having a transfer mechanism configured to transfer portions of different screen solutions contained in a screen storage plate to well regions of a crystallization plate; a screen storage station including a housing configured to store a plurality of screen storage plates and mechanics for retrieving a selected screen storage plate from among the plurality of screen storage plates for transport to the screen replicator; a transport mechanism configured to transport a screen storage plate retrieved by the screen storage station to the screen replicator; and a controller including logic for causing the screen storage station to retrieve the selected screen storage plate from among the plurality of screen storage plates, logic for causing the transport mechanism to transport the selected screen storage plate from the screen storage station to the screen replicator, and logic for causing the screen replicator to transfer portions of different
    Type: Grant
    Filed: December 1, 2004
    Date of Patent: August 26, 2008
    Assignee: Takeda San Diego, Inc.
    Inventors: Laurent Martin, John W. Palan
  • Patent number: 7416709
    Abstract: A method is provided that comprises having a trial generation station generate crystallization trials in a crystallization plate transporting the crystallization plate to an imaging station; and having the imaging station take images of the crystallization trials within 30 minutes of the formation of the crystallization trials; wherein the method is performed in a single automated system.
    Type: Grant
    Filed: December 16, 2004
    Date of Patent: August 26, 2008
    Assignee: Takeda San Diego, Inc.
    Inventors: Laurent Martin, John W. Palan
  • Patent number: 7179435
    Abstract: 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 (1) for receiving a liquid comprising the substance and an output (4) for discharging a slurry of liquid and crystals. The apparatus comprises also a first separator (1s) connected to the output 4 of the first crystallizer (1c) having a product output (2), and being with a residue output (5) connected to an input of a second crystallizer (2c), and a second separator (2s) being with an input connected to an output (6) of the second crystallizer (2c), a crystal output (7) of the second separator (2s) being connected to an input of the first crystallizer (1c).
    Type: Grant
    Filed: September 10, 2003
    Date of Patent: February 20, 2007
    Assignee: Niro Process Technology B.V.
    Inventors: Ray Sircy Ruemekorf, Reinhard Uwe Scholz
  • Patent number: 7048898
    Abstract: The invention provides an apparatus for preparing a fluid for a medical procedure by mixing of at least one medicament in the form of powder with water, the medicament is held in a vessel which defines a bottom, a side wall, and a top opening which is closed by an membrane for sealing the inside of the vessel. The apparatus includes an opener for opening the membrane of the vessel.
    Type: Grant
    Filed: December 21, 1999
    Date of Patent: May 23, 2006
    Assignees: Teijin Linited, Aksys Ltd.
    Inventors: Naohiko Moriyama, Tetsuya Yano, Ken Imai, Tsuneo Deguchi
  • Patent number: 6454853
    Abstract: The present invention pertains to a process for the purification of an organic product by fractionated crystallization, characterized in that the organic product is purified by circulation in filled tubes by varying the circulation rate at each purification and concentration stage. The invention also pertains to an apparatus for the purification of an organic product by fractionated crystallization designed for the implementation of said process.
    Type: Grant
    Filed: November 6, 2000
    Date of Patent: September 24, 2002
    Assignee: Befs Prokem S.A.
    Inventors: Guenaël Drouglazet, René Genin, Edouard Schwartzman
  • Patent number: 6267934
    Abstract: The present invention relates to an apparatus for the continuous manufacture of solid particles of alkali metal persalts by reaction of an aqueous hydrogen peroxide solution with an aqueous solution of an alkali metal salt and crystallization of the persalt. The persalt is formed in a crystallizer classifier, which is made up of stirred region and a growth region for the persalt crystals a non-stirred clarifying region for the solution and a classification region for the particles obtained by elutriation in a liquid stream withdrawn in the clarifying region.
    Type: Grant
    Filed: February 22, 1999
    Date of Patent: July 31, 2001
    Assignee: Solvay Interox (Société Anonyme)
    Inventors: Romano Pardini, Soraya Parvaneh, Corrado Baccani
  • Patent number: 5906660
    Abstract: Continuous process for the manufacture of solid particles of alkali metal persalts by reaction of an aqueous hydrogen peroxide solution with an aqueous solution of an alkali metal salt and crystallization of the persalt formed in a crystallizer-classifier comprising a stirred formation and growth region for the persalt crystals, a nonstirred clarifying region for the solution and a classification region for the particles obtained by elutriation in a liquid stream withdrawn in the clarifying region.Plant for manufacturing the said particles.
    Type: Grant
    Filed: May 15, 1997
    Date of Patent: May 25, 1999
    Assignee: Solvay Interox (Societe Anonyme)
    Inventors: Romano Pardini, Soraya Parvaneh, Corrado Baccani
  • Patent number: 5338519
    Abstract: 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 crystallization matrix having a large specific area. The melt is slowly cooled over a temperature range so as to achieve a selective crystallization from the supersaturated melt in the carrier matrix. A deposited crystal phase is thereafter melted and separated from the carrier matrix and removed by centrifugation. The carrier matrix may have a crystallization-promoting microstructure surface and may consist of an openpored foam.
    Type: Grant
    Filed: March 24, 1993
    Date of Patent: August 16, 1994
    Assignee: Sulzer Brothers Limited
    Inventors: Slobodan Jancic, Evangelos Sakellariou
  • Patent number: 5296000
    Abstract: Process and installation for crystallising an inorganic substance in a fluidised bed of crystals (14), which is generated by subjecting a solution supersaturated in the substance to be crystallised to an ascending circulation across a distributor (12), located below the bed (14), of a fluidised-bed reactor, a fraction (22) of the supersaturated solution being taken off upstream of the distributor (12) and being recycled downstream of the distributor (12) into the fluidised bed (14) or into the mother liquor from the crystallisation, and the mother liquor being supersaturated for reconstituting the said supersaturated solution.
    Type: Grant
    Filed: December 17, 1992
    Date of Patent: March 22, 1994
    Assignee: Solvay (Societe Anonyme)
    Inventors: Jacques Darmont, Leopold Detry
  • Patent number: 5292486
    Abstract: A method and an apparatus are proposed for pulling crystals from the melt. The recharging of the melt (4) is performed such that the crucible (3) is raised and lowered with respect to the crystal pulling system while keeping the position of the melt surface (25) constant with respect to the crystal pulling system.
    Type: Grant
    Filed: August 20, 1991
    Date of Patent: March 8, 1994
    Assignee: Leybold Aktiengesellschaft
    Inventor: Dieter Drechsel
  • Patent number: 5234664
    Abstract: A pulling shaft carries a seed crystal holder and moves it vertically to pull a crystal upward from a melt in a crucible. The pulling shaft is rotated by a drive to cause the crystal to rotate while being pulled. A slippage device is provided to permit a difference between rotational speeds of the pulling shaft and the seed crystal. The slippage device may be incorporated in a crystal holder having an inner holder fixed to the seed crystal, an outer holder fixed to the shaft, and a friction bearing therebetween which prevents undue torsional stress from being transmitted to the crystal.
    Type: Grant
    Filed: August 20, 1991
    Date of Patent: August 10, 1993
    Assignee: Leybold Aktiengesellschaft
    Inventor: Dieter Drechsel
  • Patent number: 5124265
    Abstract: A crystallizer control method and apparatus that generate control signals to manipulated process parameters on the basis of on-line information derived from the measurement of the crystal population in a selected size range in the crystallizer slurry. According to one embodiment of the invention, a particle counter probe is immersed directly into the fines removal circuit of the crystallizer for on-line measurement of crystal population in the 16 to 32 micron size range. The data so collected are then used directly in a standard proportional controller apparatus to manipulate certain operating parameters, such as fines removal rate and feed rate, to effect the desired result. Applying this model-independent control method to a KCl crystallizer, the steady-state conditions of the crystal size distributions were reestablished after an upset in approximately half the time required when no control was applied.
    Type: Grant
    Filed: October 15, 1990
    Date of Patent: June 23, 1992
    Assignee: Arizona Technology Development Corporation
    Inventor: Alan D. Randolph
  • Patent number: 4954388
    Abstract: An abrasion-resistant, tear-resistant, multilayer composite membrane, useful in electrolysis, is provided comprising a continuous perfluoro ion exchange polymer film attached to a reinforcing fabric by means of a porous, expanded polytetrafluoroethylene (EPTFE) interlayer. The fabric and EPTFE are rendered hydrophilic and non-gas-locking by coating the interior and exterior surfaces thereof with a perfluoro ion exchange resin of equivalent weight less than 1000. The composite preferably is treated with an ionic perfluoro surfactant. Also provided is a multilayer composite according to the above in which the continuous perfluoro ion exchange film is itself a multilayer construction of a perfluorosulfonate polymer and a thin layer of perfluorocarboxylate polymer in which the perfluorosulfonate polymer interfaces with the EPTFE and the interior and exterior surfaces of the EPTFE and fabric are coated with perfluorosulfonate polymer.
    Type: Grant
    Filed: November 30, 1988
    Date of Patent: September 4, 1990
    Inventors: Robert S. Mallouk, Phillip A. Branca, Randal L. Perry
  • Patent number: 4946739
    Abstract: This invention is directed to an enamel paint receptive flexible laminate and its method of manufacture. The laminate is useful for making banners, flags, signs and the like that are decorated with enamel poster paints. The laminates of the present invention comprise a base fabric material, a first film coating of a plasticized polyvinyl chloride and a second coating of thermosetting vinyl acrylic copolymer. The thermosetting vinyl acrylic copolymer promotes increased adhesion and decreased drying time of poster paints and lettering enamel when they are applied to the coating.
    Type: Grant
    Filed: December 13, 1988
    Date of Patent: August 7, 1990
    Assignee: Borden, Inc.
    Inventors: Dwight E. Chapman, David R. Morse
  • Patent number: 4933231
    Abstract: An abrasion and tear resistant, high strength composite laminated padded fabric material for use in the fabrication of tradesmen and craftsmen work items such as aprons and nail bags, tool pouches and tool holders, cordless tool holsters, belts and back support pads, knee pads and the like. The composite fabric material of the invention is a heat and pressure formed double laminate of like outer primary layers of tight-woven threads of high-tenacity nylon fibers and an intermediate padding layer of cross-linked, high-density, closed-cell or open-cell, flexible synthetic polymer foam. The composite laminated fabric material is formed by first bonding one of the outer nylon fabric layers to one side of the intermediate foam layer and thereafter bonding the other outer nylon fabric layers to the other side of the intermediate foam layer.
    Type: Grant
    Filed: February 6, 1989
    Date of Patent: June 12, 1990
    Assignee: McGuire-Nicholas Company, Inc.
    Inventor: Brett P. Seber
  • Patent number: 4801436
    Abstract: An apparatus for growing free-floating, buoyant crystals to a predetermined size. Crystals having a positive buoyancy such as water crystals (ice) grow due to immersion in a stream of supercooled feed water that flows downward in a tapered incubation duct with a velocity that decreases as the cross-sectional area of the duct increases with increased depth. As the crystals grow, their terminal buoyant velocity increases until it exceeds the peak stream velocity. At this time the crystals float upward and out of the apparatus. A plurality of interconnected incubation ducts may be stacked vertically one above the other. The apparatus may be combined with apparatus to grow free-floating crystals having a negative buoyancy from a supersaturated salt solution that is discharged from the bottom of the apparatus for growing crystals having a positive buoyancy.
    Type: Grant
    Filed: December 19, 1986
    Date of Patent: January 31, 1989
    Assignee: Living Water Corporation
    Inventor: Colin A. Connery
  • Patent number: 4735781
    Abstract: 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 between the interior of the tube and the interior of the cylinder. Two or more of such apparatus can be connected in series in order to form a cascade.
    Type: Grant
    Filed: July 19, 1985
    Date of Patent: April 5, 1988
    Assignee: Nederlandse Centrale Organisatie Voor Toegepast Natuurwetenschappelijk onderzoek Juliana Van Stolberglaan
    Inventors: Henricus A. C. Thijssen, Gerardus J. Arkenbout
  • Patent number: 4597950
    Abstract: Apparatus and a method for separating gases and vapors from a geopressure or hydropressured brine without allowing precipitation of scale deposits on the walls of vessels and pipes. The apparatus includes a reactor having an inlet pipe provided with a Venturi throat and an expansion nozzle coupled with the throat to depressurize the brine to cause separation of the gases and vapors from the liquid and solid fractions of the brine. The gases and vapors travel out of the reactor through a central pipe extending downwardly and through the reactor. The brine in the form of a slurry gravitates in the reactor toward a first outlet pipe while clarified brine rises past in internal baffle and leaves the reactor through a second outlet pipe.
    Type: Grant
    Filed: June 11, 1984
    Date of Patent: July 1, 1986
    Assignee: Bechtel International Corporation
    Inventors: Alfred N. Rogers, Leon Awerbuch
  • Patent number: 4590038
    Abstract: To permit the output of a vertical fluidizing-cell column to be increased, its cross-sectional area to be enlarged, and the installation of plates in the column to be simplified, the plates are made conical or pyramidal with their concave and convex sides alternately directed upwardly. The plates have central openings for the passage of one stream of material, and are mounted in the column with peripheral passages for another stream of material. Preferably the plates are movable relative to each other and have movable center pieces variably closing some of the central openings for varying the operation of the column.
    Type: Grant
    Filed: March 17, 1983
    Date of Patent: May 20, 1986
    Assignee: Georg Schreiber
    Inventors: Georg Schreiber, Heinrich Lob
  • Patent number: 4332592
    Abstract: A process for the continuous crystallization of at least one crystallizable material from a solution wherein a series of crystallization stages are utilized, with partial crystallization taking place in each stage. The process includes the classification of partially crystallized suspension between each stage, and the suspension from the final stage is passed to a separator wherein it is separated into a concentrated suspension containing crystals and a spent liquor, the concentrated suspension being returned to the final stage and the spent liquor being discharged. Product crystals are taken from the first stage of the series.
    Type: Grant
    Filed: May 8, 1979
    Date of Patent: June 1, 1982
    Inventor: Tore B. Muller
  • Patent number: 4323623
    Abstract: Core sandwich structure comprised of a lightweight core material in the form of a low density thermosetting resin matrix composition containing glass microballoons, particularly an epoxy resin containing glass microballoons, sandwiched between high strength fiber-thermosetting resin matrix outer sheets, particularly woven graphite-epoxy sheets. Employing epoxy resin as the preferred thermosetting resin, the epoxy core material is B-staged, placed between sheets of pre-preg woven graphite-epoxy material, and the assembly co-cured under pressure to form the core sandwich structure.
    Type: Grant
    Filed: October 27, 1978
    Date of Patent: April 6, 1982
    Assignee: McDonnell Douglas Corporation
    Inventors: Robert O. Ahrens, Jerry L. Merkel
  • Patent number: 4174382
    Abstract: A process for selectively recovering coarse crystalline K.sub.2 SO.sub.4 from a crystallizer is disclosed. A classifier comprising an elongated cylindrical vessel which is located separate from the crystallizer is employed in the process. Crystallization is effected in the crystallizer and supernatant liquor recovered as overflow during crystallization is passed from the crystallizer into the lower portion of the elongated cylindrical vessel. Slurry is recovered from the bottom of the crystallizer and introduced into a middle portion of the elongated cylindrical vessel. Coarse crystalline K.sub.2 SO.sub.4 falls to the bottom of the elongated cylindrical vessel and is recovered therefrom. Fine crystalline K.sub.2 SO.sub.4 is entrained in the upwardly flowing liquor and passed upwardly therewith. The upwardly flowing liquor and fine crystalline K.sub.2 SO.sub.4 are withdrawn from the top of the elongated cylindrical vessel and recycled to the crystallizer.
    Type: Grant
    Filed: June 8, 1977
    Date of Patent: November 13, 1979
    Assignee: Kali und Salz AG
    Inventor: Eckhard Menche
  • Patent number: 4158039
    Abstract: Apparatus for continuously separating sulfur from an aqueous sulfur suspension which is heated above the melting point of sulfur. The apparatus comprises a pressure vessel having heating and stirring means in its upper part, the lower part of the vessel serving as a settling tank where sulfur is precipitated out of the aqueous solution and withdrawn through an outlet in the bottom of the vessel. Intermediate the upper and lower parts of the vessel is a substantially horizontal, shallow conical partition which has apertures or slots therein to permit the suspension to pass from the upper part to the lower part. A steam-heated jacket surrounds the vessel; while pressure sensing devices are utilized to maintain the level of the water in the top part and the boundary surface between the water phase and the sulfur phase in the bottom part at desired heights.
    Type: Grant
    Filed: July 21, 1977
    Date of Patent: June 12, 1979
    Assignee: Dr. C. Otto & Comp. G.m.b.H.
    Inventor: Hansjurgen Ullrich