One A Filming Distillation Patents (Class 203/72)
  • Patent number: 9719047
    Abstract: The present invention pertains to a process for refining of crude tall oil (CTO). The process comprises fractionation under vacuum of a refined CTO into at least one stream of refined tall diesel (RTD) or tall oil fatty acids (TOFA), the RTD or TOFA comprises from 2-30% by volume of resin acids and from 20-90% by volume of fatty acids, and at least one stream of resin acid(s) (RA) comprising less than 5% by volume of fatty acids. The stream of RTD or TOFA is deoxygenated forming hydrocarbon compounds in a subsequent step. This invention also relates to a refined tall diesel. Furthermore, a process for the production of a refined tall diesel (RTD) composition, wherein crude sulphate turpentine(s) (CST) is added to the refined tall diesel (RTD) composition, is described.
    Type: Grant
    Filed: December 20, 2013
    Date of Patent: August 1, 2017
    Assignee: Sunpine AB
    Inventors: Lars Stigsson, Valeri Naydenov, Johan Lundback
  • Patent number: 9347112
    Abstract: In pretreating a pyridine ring-containing chelate resin which is used in the step for adsorption and collection of a heavy metal ion and a bromide ion derived from a catalyst from the oxidation reaction mother liquid in the process of producing a terephthalic acid, there may occur phenomena such as swelling of the resin, heat generation of the resin, and air bubbles generation, thereby causing fracture and deterioration of the resin. As a first treatment, Br? conversion, under a certain condition, of a pyridine ring-containing chelate resin with an aqueous solution of hydrobromic acid is performed, and then as a second treatment, replacement with acetic acid solvent is performed, thereby making it possible to prevent fracture and deterioration of the resin.
    Type: Grant
    Filed: February 18, 2011
    Date of Patent: May 24, 2016
    Assignee: MITSUBISHI GAS CHEMICAL COMPANY, INC.
    Inventors: Fumiya Zaima, Hideaki Fujita
  • Patent number: 8986508
    Abstract: A thermal desalination system adapted to produce distilled water from feed water which may be sea water, based on a forward feed evaporator made up of a main water feed line, a vapor feed line, a distilled water main line and any number of effect groups. The effect groups include any number of effects which in turn include vapor inlets, water inflow lines, concentrate outflow lines that drain into a common concentrate drainage line, a vapor and water outlet in fluid communication with the distilled water main line, and heat transfer means that condense part of an inlet vapor to produce the distilled water.
    Type: Grant
    Filed: October 21, 2013
    Date of Patent: March 24, 2015
    Assignee: I.D.E. Technologies Ltd.
    Inventors: Avraham Ophir, Joseph Weinberg
  • Patent number: 8951392
    Abstract: A modular portable evaporator system for use in a Steam Assisted Gravity Drainage (SAGD) systems having an evaporator, with a sump including an oil skimming weir, a short tube vertical falling film heat exchanger including an outer shell containing short tubes provided for lower water circulation rate. The system further having external to the evaporator, a compressor for compressing evaporated steam from the tube side of the heat exchanger and routing to the shell side of the same exchanger, a distillate tank to collect hot distilled water, a recirculation pump to introduce liquids from the sump into the heat exchanger and an external suction drum protecting the compressor from liquid impurities. The evaporator system receives produced water from the SAGD process into the sump and provides cleaned hot water to a boiler.
    Type: Grant
    Filed: April 15, 2011
    Date of Patent: February 10, 2015
    Assignee: 1nSite Technologies Ltd.
    Inventor: Kenneth James
  • Publication number: 20140275465
    Abstract: A process of purifying 1,4-butanediol (1,4-BDO) from a fermentation broth including separating solid materials, salts and water, and subjecting the resulting material to a two, three or four column distillation system, that can include a wiped film evaporator to produce a purified 1,4-butanediol.
    Type: Application
    Filed: March 14, 2014
    Publication date: September 18, 2014
    Inventors: SVB Janardhan Garikipati, Michael Japs, Ishmael M. Sonico
  • Publication number: 20140183031
    Abstract: A process is proposed for the treatment of a recycling stream (1) from a plant for the production of polyarylene ether sulfones via polycondensation of aromatic bishalogen compounds and of aromatic bisphenols or their salts in the presence of at least one alkali metal carbonate or ammonium carbonate or alkali metal hydrogencarbonate or ammonium hydrogencarbonate in an N-alkyl-2-pyrrolidone as solvent, comprising from 60 to 90% by weight of water, from 10 to 40% by weight of the N-alkyl-2-pyrrolidone and, as contaminant detrimental to specification, up to 5000 ppm by weight of the N-alkylsuccinimide corresponding to the N-alkyl-2-pyrrolidone and, alongside this, up to 1000 ppm by weight of other substances with higher boiling point than the N-alkyl-2-pyrrolidone, in particular inorganic salts, based in each case on the total weight of the recycling stream (1), where the entirety of the components gives 100% by weight, giving a pure N-alkyl-2-pyrrolidone stream (2) which can be returned to the plant for the p
    Type: Application
    Filed: December 26, 2013
    Publication date: July 3, 2014
    Applicant: BASF SE
    Inventors: Christoph Sigwart, Cornelies Hendricus De Ruiter, Jörg Erbes, Gerhard Lange, Tobias Kortekamp
  • Publication number: 20130245301
    Abstract: The present invention relates to a process and an apparatus for purifying a mixture of terpene material and tall oil material for the production of biofuels and components thereof. The present invention relates further to hydroprocessing of the purified material to obtain biofuels and components thereof.
    Type: Application
    Filed: November 25, 2011
    Publication date: September 19, 2013
    Applicant: UPM-KYMMENE CORPORATION
    Inventors: Jaakko Nousiainen, Heli Laumola, Arto Rissanen, Jari Kotoneva, Matti Ristolainen
  • Patent number: 8486223
    Abstract: A falling film evaporator having a shell pass, multiple tubes parallel to each other, a condensed steam outlet, an inlet for an aqueous solution on the top of the tube pass, an outlet for the aqueous solution at the bottom of the tube pass, a distributing assembly having a plurality of distributing trays arranged vertically from top to bottom in incremental diameters and each having multiple holes, and a plate for collecting the aqueous solution below the distributing assembly. The tubes are straight and installed vertically in the evaporator; inner wall of the tubes is smooth, and the top portion of the tubes is protruded above a horizontal plane of the plate. The evaporator is particularly useful for concentrating an aqueous solution containing thermosensitive materials.
    Type: Grant
    Filed: October 7, 2010
    Date of Patent: July 16, 2013
    Assignee: Jiangsu Sinorgchem Technology Co., Ltd.
    Inventors: Xiaogen Feng, Nongyue Wang, Xiaohui Mao, Ruibiao Yu, Qianwen Cheng
  • Patent number: 8404086
    Abstract: Effect separation of a composition of matter that includes at least two seed or plant oil derivatives into at least one desired product stream using at least two separation operations, which are independently selected from among several potential separation operations, in conjunction with at least one recycle stream from a separation operation.
    Type: Grant
    Filed: June 20, 2008
    Date of Patent: March 26, 2013
    Assignee: Dow Global Technologies LLC
    Inventors: George J. Frycek, Shawn D. Feist, Timothy C. Frank, Zenon Lysenko, Joe D. Phillips, Bruce W. Pynnonen
  • Patent number: 8287698
    Abstract: The present invention relates to a process and a system for producing alcohol by distillation with energy optimization using split-feed technology. The process of the present invention comprises the steps of: a) splitting a stream of wine to feed two depuration columns , the depuration column generating a stream of phlegma and the depuration column generating a stream of phlegma and a stream of vinasse; b) feeding the stream of phlegma into at least one rectification column generating a top flow and a stream of hydrated alcohol; c) effecting the heat exchange between the top flow from at least one rectification column and the stream of vinasse from the depuration column in at least one heat exchanger; and d) feeding the stream of phlegma into a rectification column generating a stream of hydrated alcohol. The present invention further relates to hydrated alcohol produced by the process described above and to a process for producing anhydrous alcohol.
    Type: Grant
    Filed: February 7, 2007
    Date of Patent: October 16, 2012
    Assignees: Siemens Ltda., Dedini S/A Industrias de Base
    Inventors: Flávio Martins De Queiroz Guimarães, Carlos Eduardo Fontes Da Costa E Silva, Adler Gomes Moura
  • Patent number: 8231765
    Abstract: A method and a plant are disclosed for purifying lactams, particularly lactams obtained by cyclizing hydrolysis of aminonitrile. The purification of ?-caprolactam obtained by cyclizing hydrolysis of aminocapronitrile is described which includes eliminating the ammonia from the reaction medium of the hydrolysis, then recovering the lactam from the medium in purified form. The recovery is carried out by performing at least a distillation of the lactam in the presence of a base producing optionally a fronts fraction having compounds more volatile than the lactam, a fraction having the lactam to be recovered to the degree of desired purity and a distillation tails having the lactam and compounds less volatile than the lactam. The distillation tails are treated by various processes such as evaporation in thin layers to recover the major part of the caprolactam and recycling the latter in the purification process.
    Type: Grant
    Filed: May 29, 2008
    Date of Patent: July 31, 2012
    Assignee: Rhodia Polyamide Intermediates
    Inventors: Daniel Amoros, Philippe Leconte, Pierre Coqueret
  • Patent number: 8192589
    Abstract: The invention relates to a method and a device for the purification of an aqueous solution of an organic acid having a boiling point at atmospheric pressure of less than 450° C., which further has approximately 275 g carboxylate ions/l or less, preferably 250 g carboxylate ions/l or less, and preferably less than 1% by weight ionic impurities, calculated on the basis of the total solution. In particular, the invention relates to a method and a device for the continuous purification and concentration, on an industrial scale, of an aqueous solution of an organic acid having a boiling point at atmospheric pressure of less than 450° C. According to the method, this solution is subjected to two or more distillation steps, the first distillation step being carried out at a temperature of from 80° to 150° C. and a pressure of from 50 to 250 mbar, and the second distillation step being carried out at a temperature of from 80° to 200° C. and a pressure of from 0.01 to 50 mbar.
    Type: Grant
    Filed: December 20, 2010
    Date of Patent: June 5, 2012
    Assignee: Purac Biochem B.V.
    Inventors: Hendrik Martinus Winkelaar, Jan Van Breugel, Margarita Camprubi Vilá, José Maria Vidal Lancis
  • Patent number: 8092656
    Abstract: A process for treatment of an aqueous stream to produce a low solute containing distillate stream and a high solute/solids containing blowdown stream utilizing a method to increase the efficiency of an evaporator while providing an essentially scale free environment for the heat transfer surface. Multi-valent ions and non-hydroxide alkalinity are removed from aqueous feed streams to very low levels and then the pH is increased preferably to about 9 or higher to increase the ionization of low ionizable constituents in the aqueous solution. In this manner, species such as silica and boron become highly ionized, and their solubility in the concentrated solution that is present in the evaporation equipment is significantly increased. The result of this is high allowable concentration factors and a corresponding increase in the recovery of high quality reusable water with essentially no scaling.
    Type: Grant
    Filed: October 17, 2003
    Date of Patent: January 10, 2012
    Assignee: Aquatech International Corporation
    Inventors: Keith R. Minnich, Ramkumar Karlupudi, Richard M. Schoen
  • Publication number: 20110226606
    Abstract: A falling film evaporator having a shell pass, multiple tubes parallel to each other, a condensed steam outlet, an inlet for an aqueous solution on the top of the tube pass, an outlet for the aqueous solution at the bottom of the tube pass, a distributing assembly having a plurality of distributing trays arranged vertically from top to bottom in incremental diameters and each having multiple holes, and a plate for collecting the aqueous solution below the distributing assembly. The tubes are straight and installed vertically in the evaporator; inner wall of the tubes is smooth, and the top portion of the tubes is protruded above a horizontal plane of the plate. The evaporator is particularly useful for concentrating an aqueous solution containing thermosensitive materials.
    Type: Application
    Filed: October 7, 2010
    Publication date: September 22, 2011
    Applicant: Jiangsu Sinorgchem Technology Co., Ltd.
    Inventors: Xiaogen FENG, Nongyue WANG, Xiaohui MAO, Ruibiao YU, Qianwen CHENG
  • Publication number: 20110089016
    Abstract: The invention relates to a method and a device for the purification of an aqueous solution of an organic acid having a boiling point at atmospheric pressure of less than 450° C., which further has approximately 275 g carboxylate ions/l or less, preferably 250 g carboxylate ions/l or less, and preferably less than 1% by weight ionic impurities, calculated on the basis of the total solution. In particular, the invention relates to a method and a device for the continuous purification and concentration, on an industrial scale, of an aqueous solution of an organic acid having a boiling point at atmospheric pressure of less than 450° C. According to the method, this solution is subjected to two or more distillation steps, the first distillation step being carried out at a temperature of from 80° to 150° C. and a pressure of from 50 to 250 mbar, and the second distillation step being carried out at a temperature of from 80° to 200° C. and a pressure of from 0.01 to 50 mbar.
    Type: Application
    Filed: December 20, 2010
    Publication date: April 21, 2011
    Inventors: Hendrik Martinus Winkelaar, Jan Van Breugel, Margarita Camprubi Vila, Jose Maria Vidal Lancis
  • Publication number: 20110031102
    Abstract: Effect separation of a composition of matter that includes at least two seed or plant oil derivatives into at least one desired product stream using at least two separation operations, which are independently selected from among several potential separation operations, in conjunction with at least one recycle stream from a separation operation.
    Type: Application
    Filed: June 20, 2008
    Publication date: February 10, 2011
    Inventors: George J. Frycek, Shawn D. Feist, Timothy C. Frank, Zenon Lysenko, Joe D. Phillips, Bruce W. Pynnonen
  • Patent number: 7799178
    Abstract: An improved method for efficiently adding additional heat values into a distillation process to optimize the production of distillate from water.
    Type: Grant
    Filed: December 22, 2005
    Date of Patent: September 21, 2010
    Assignee: Black & Veatch Holding Company
    Inventor: Michael J. Eddington
  • Patent number: 7670456
    Abstract: In a multi-effect falling-film evaporator, purified water for special purposes is produced. In each effect, a steam phase and a water phase is produced from the feed water. The steam phase is used for heating in the subsequent effect, whereby it condenses to product water, and the water phase becomes the feed stream for the subsequent effect. A reject stream is removed from the process to carry off impurities separated from the water. According to the invention, a reject stream is removed from each effect. Preferably, each reject stream is a condensed fraction of the steam generated in the respective effect.
    Type: Grant
    Filed: May 14, 2004
    Date of Patent: March 2, 2010
    Assignee: STERIS Europe Inc. Suomen Sivuliike
    Inventors: Teppo Nurminen, Mauri Salmisuo
  • Patent number: 7666281
    Abstract: Purified water for special purposes is produced using a falling-film multieffect evaporator. From the feed water, each effect produces a steam phase and a water phase. The steam phase is used for heating in the subsequent evaporating step, whereby the steam phase condenses to product water, and the water phase becomes feed water for the subsequent evaporation step. According to the invention, the product water may be wholly or partly recycled to the initial feed water, allowing process startup and sterilisation of the plant without conducting hot product water to the drain.
    Type: Grant
    Filed: May 12, 2004
    Date of Patent: February 23, 2010
    Assignee: STERIS Europe Inc. Suomen Sivuliike
    Inventors: Ilkka Olavi Laitinen, Teppo Nurminen, Mauri Salmisuo
  • Patent number: 7410556
    Abstract: The invention relates to a method and a device for the purification of an aqueous solution of an organic acid having a boiling point at atmospheric pressure of less than 450° C., which further has approximately 275 g carboxylate ions/1 or less, preferably 250 g carboxylate ions/1 or less, and preferably less than 1% by weight ionic impurities, calculated on the basis of the total solution. In particular, the invention relates to a method and a device for the continuous purification and concentration, on an industrial scale, of an aqueous solution of an organic acid having a boiling point at atmospheric pressure of less than 450° C. According to the method, this solution is subjected to two or more distillation steps, the first distillation step being carried out at a temperature of from 80° to 150° C. and a pressure of from 50 to 250 mbar, and the second distillation step being carried out at a temperature of from 80° to 200° C. and a pressure of from 0.01 to 50 mbar.
    Type: Grant
    Filed: November 27, 2000
    Date of Patent: August 12, 2008
    Assignee: Purac Biochem B.V.
    Inventors: Hendrik Martinus Winkelaar, Jan Van Breugel, Margarita Camprubi Vila, Jose Maria Vidal Lancis
  • Patent number: 7384518
    Abstract: A method and a plant are disclosed for purifying lactams, particularly lactams obtained by cyclizing hydrolysis of aminonitrile. The purification of ?-caprolactam obtained by cyclizing hydrolysis of aminocapronitrile is described which includes eliminating the ammonia from the reaction medium of the hydrolysis, then recovering the lactam from said medium in purified form. The recovery is carried out by performing at least a distillation of the lactam in the presence of a base producing optionally a fronts fraction comprising compounds more volatile than the lactam, a fraction comprising the lactam to be recovered to the degree of desired purity and a distillation tails comprising the lactam and compounds less volatile than the lactam. The distillation tails are treated by various processes such as evaporation in thin layers to recover the major part of the caprolactam and recycling the latter in the purification process.
    Type: Grant
    Filed: May 28, 2001
    Date of Patent: June 10, 2008
    Assignee: Rhodia Polyamide Intermediates
    Inventors: Daniel Amoros, Philippe Leconte, Pierre Coqueret
  • Patent number: 7182840
    Abstract: The invention relates to a method and a device for the optimal use of reaction heat resulting from the production of 1,2-dichloroethane from ethene and chlorine. The aim of the invention is achieved by extracting reaction heat liberated during the reaction of chlorine with ethene and the reaction heat contained in 1,2-dichloroethane. Extraction of said reaction heat from the reaction chamber occurs using at least one part of gaseous 1,2-dichloroethane (latent heat) and at least one part of liquid 1,2-dichloroethane (feelable heat) removed from the reaction chamber. Said reaction heat is used to heat two fractioning columns in order to purify 1,2-dichloroethane of impurities having a boiling point higher than 1,2-dichloroethane.
    Type: Grant
    Filed: October 28, 2000
    Date of Patent: February 27, 2007
    Assignee: UHDE GmbH
    Inventors: Michael Benje, Peter Porscha, Stefan Von Egelstein
  • Patent number: 6998026
    Abstract: A tert-C4–C8-alkyl (meth)acrylate is prepared by reacting (meth)acrylic acid with an olefin of the formula where R1 and R2, which may be identical or different, are methyl or ethyl and R3 is H, methyl or ethyl, in homogeneous phase in the presence of an acidic catalyst and isolating the tert-C4–C8-alkyl (meth)acrylate from the reaction mixture, by a process in which the catalyst is separated off as residue by a two-stage distillation of the reaction mixture and the tert-C4–C8-alkyl (meth)acrylate is isolated from the distillates. The novel process makes it possible to use acetic acid-containing (meth)acrylic acid. The danger of cleavage of the ester and of polymerization of (meth)acrylic compounds is reduced.
    Type: Grant
    Filed: July 27, 2001
    Date of Patent: February 14, 2006
    Assignee: BASF Aktiengesellschaft
    Inventors: Ruprecht Kroker, Gerhard Nestler, Werner Schmitt, Winfried Schumm
  • Patent number: 6780288
    Abstract: Process for the manufacture of a concentrated solution, like a concentrated aqueous hydrogen peroxide solution, by distillation and evaporation of a dilute solution, in which the distillation and the evaporation are carried out in two distinct pieces of equipment which are easy to dismantle and to transport. Aqueous hydrogen peroxide solutions having a concentration of at least 90% are obtainable.
    Type: Grant
    Filed: October 5, 2000
    Date of Patent: August 24, 2004
    Assignee: Solvay S.A.
    Inventors: Stephen Bloomfield, Graham E. Williams
  • Patent number: 6746567
    Abstract: A film or tape has one of its major surfaces defined by microstructured features including a plurality of channels defined by spaced apart protrusions. The microstructured film is able to acquire liquids and to control the directional transport of such liquids for subsequent removal therefrom. The transport can be passive or active (i.e., caused or enhanced by an applied potential). The inventive microstructured films and tapes have applications in laminate floor assemblies (for spill removal) and industrial articles such as computer keyboards and other devices and assemblies that benefit from fluid removal. The invention also has application in evaporative and condensation applications. In one embodiment, at least one cross-channel is formed on the microstructured surface to join adjacent channels for liquid flow therebetween.
    Type: Grant
    Filed: December 20, 2002
    Date of Patent: June 8, 2004
    Assignee: 3M Innovative Properties Company
    Inventors: Raymond P. Johnston, Sara B. Mortenson, Douglas A. Huntley, Stephanie B. Castiglione
  • Patent number: 6635150
    Abstract: A method for distilling a fluid which is useful, for instance, in eliminating salt from brackish and/or sea water includes percolating films on plates with multiple effects having several evaporating zones and condensation zones. The evaporation zones (EVAP) and the condensation zones (COND) are vertically arranged. The liquid to be distilled emerges in the top part of the evaporation zone (EVAP). The vapors produced in the evaporation zone (EVAP) are horizontally transferred into the condensation zone (COND) through a communicating connection. The condensed liquid percolates vertically along the walls of the condensation zone and is evacuated from the lower part of the condensation zone. A distilling plant is also provided for implementing the distilling method, and includes plural cascades made up of elementary cells alternatingly assembled in thermal series.
    Type: Grant
    Filed: January 23, 2001
    Date of Patent: October 21, 2003
    Assignee: Centre International de l'Eau de Nancy - Nancie
    Inventors: Pierre Le Goff, Jean-Marie Hornut, Viviane Renaudin
  • Publication number: 20030178295
    Abstract: A process for the preparation of citalopram of formula (I) 1
    Type: Application
    Filed: February 10, 2003
    Publication date: September 25, 2003
    Applicant: H. LUNDBECK A/S
    Inventors: Andrea Castellin, Giulio Volpe, Federico Sbrogio
  • Patent number: 6623546
    Abstract: According to the invention, the vapor is taken from the condensation chamber of the dehydrator and, prior to being compressed and at a temperature substantially equal to 100° C., it is caused to pass in succession through a series of purifiers, and in each of the purifiers it is forced through rain containing a purifying solution, at least one of the rain solutions being water, another containing an acid, and another containing a base. The invention is applicable to treating the vapor that results from dehydrating a variety of kinds of matter, such as farmyard manure, in particular.
    Type: Grant
    Filed: July 25, 2001
    Date of Patent: September 23, 2003
    Assignee: Sirven
    Inventor: Jacques Bourdel
  • Publication number: 20030173205
    Abstract: A process vessel containing both an evaporation zone for evaporating a liquid feed and a treatment zone for treating the resulting vapor comprises an injector having an orifice, the orifice being in the evaporation zone, at least one evaporation surface for evaporating feed and generating vapor, the evaporation surface being located in the evaporation zone, wherein the injector orifice and the evaporation surface are positioned to prevent the formation of a drop at the orifice, a treatment zone for treating the vapor and at least one heater associated with at least a portion of the process vessel.
    Type: Application
    Filed: March 12, 2002
    Publication date: September 18, 2003
    Inventors: Arne Karlsson, Ivar M. Dahl, Jonny Engedahl, Mark A. Krawczyk, Ara J. Alexanian
  • Patent number: 6605191
    Abstract: A process for the work up of a reaction mixture obtained from the preparation of diaryl carbonate by direct carbonylation of aromatic hydroxy compounds is disclosed. The process entails obtaining a reaction mixture that contains diaryl carbonate, aromatic hydroxy compound, water, base and quaternary salt, separating the mixture in a distillation apparatus having only one theoretical separation stage into a liquid phase and a gas phase and recycling the liquid phase without further work up to the reaction step of the direct carbonylation.
    Type: Grant
    Filed: June 15, 2001
    Date of Patent: August 12, 2003
    Assignee: Bayer Aktiengesellschaft
    Inventors: Carsten Hesse, Ursula Jansen, Johann Rechner, Claus-Peter Reisinger, Rob Eek, Kaspar Hallenberger, Martin Friedrich
  • Publication number: 20030127315
    Abstract: A tert-C4-C8-alkyl (meth)acrylate is prepared by reacting (meth)acrylic acid with an olefin of the formula 1
    Type: Application
    Filed: January 27, 2003
    Publication date: July 10, 2003
    Inventors: Ruprecht Kroker, Gerhard Nestler, Werner Schmitt, Winfried Schumm
  • Patent number: 6423187
    Abstract: A thin film distiller is provided which applies distilland to an evaporative side by the use of wicks which work by capillary action. The evaporated vapor is transferred to the condensate side after being compressed to a higher pressure where it is condensed and removed by similar wicks. The condensing and evaporating surfaces are formed on opposing sides of a bellows-like sheet of heat conducting material. The sheet would preferably be formed into a cylindrical shape with the evaporative stage on the outside and the condensing stage on the inside of the cylinder. Either the wicks or the heat conducting material are moved with respect to the other such that the wicks place a thin film of distilland on the evaporative surface. Removal of condensate is performed in a similar manner by the wicks in the condensate stage.
    Type: Grant
    Filed: December 11, 1998
    Date of Patent: July 23, 2002
    Assignee: Ovation Products Corporation
    Inventor: William H. Zebuhr
  • Publication number: 20020040844
    Abstract: A thin film distiller is provided which applies distilland to an evaporative side by the use of wicks which work by capillary action. The evaporated vapor is transferred to the condensate side after being compressed to a higher pressure where it is condensed and removed by similar wicks. The condensing and evaporating surfaces are formed on opposing sides of a bellows-like sheet of heat conducting material. The sheet would preferably be formed into a cylindrical shape with the evaporative stage on the outside and the condensing stage on the inside of the cylinder. Either the wicks or the heat conducting material are moved with respect to the other such that the wicks place a thin film of distilland on the evaporative surface. Removal of condensate is performed in a similar manner by the wicks in the condensate stage.
    Type: Application
    Filed: December 11, 1998
    Publication date: April 11, 2002
    Inventor: WILLIAM H. ZEBUHR
  • Publication number: 20020038760
    Abstract: An evaporation product discharged from a lower end a falling-film evaporator (1, 2) enters a downpipe (7), makes a 180° turn at a bottom of the downpipe, and moves upward through an annular rising channel (9) defined between the downpipe and an intermediate housing (10). As the evaporation product moves along a spiral path (12) defined by the spiral fins, centrifugal forces urges water droplets and impurities to a radial outward periphery where they pass through openings (13) in the intermediate shell as pure steam continues through the spiral path and out a pure steam outlet (21). A cooling jacket (15) chills a peripheral wall of an outer shell (14) adjacent the holes such that the discharged water droplets condense on the outer shell and flow down a reject water return path to a reject water reservoir at the bottom of the outer shell.
    Type: Application
    Filed: September 21, 2001
    Publication date: April 4, 2002
    Applicant: STERIS EUROPE, INC.
    Inventor: Mauri J. Salmisuo
  • Patent number: 6350352
    Abstract: A process for distillative separation of pure (meth)acrylic acid from mixtures which include comprise (meth)acrylic acid and dimers and oligomers of (meth)acrylic acid and are essentially free from aldehydes and from components whose boiling point is lower than that of (meth)acrylic acid, using a distillation apparatus which has a thin-film evaporator, a condenser and a connection which contains a baffle device and links the thin-film evaporator and the condenser.
    Type: Grant
    Filed: February 22, 1999
    Date of Patent: February 26, 2002
    Assignee: BASF Aktiengesellschaft
    Inventors: Ruprecht Kroker, Manfred Wiedemann
  • Patent number: 6336997
    Abstract: A heat-deteriorative compound contained in a liquid mixture is refined by a distillation procedure using a distillation column in which a vapor fraction and a liquid fraction containing the heat-deteriorative compound are generated from the liquid mixture, and a liquid film-falling reboiler in which the liquid fraction falls in the form of liquid films along inner surfaces of a plurality of vertical heat-conductive pipes at a Reynolds number (Re) of 700 to 10,000 and heated to a temperature lower than the heat-deterioration temperature of the heat deteriorative compound to such an extent that 1 to 15% by weight of the liquid fraction is evaporated per pass through the reboiler, the heated liquid fraction being returned into the distillation column to generate the vapor fraction from the liquid mixture fed into the distillation column.
    Type: Grant
    Filed: February 1, 1999
    Date of Patent: January 8, 2002
    Assignee: Ube Industries, Ltd.
    Inventors: Yukio Inaba, Kazunori Fujita, Hiroshi Kofuji
  • Patent number: 6334935
    Abstract: A (meth)acryloxy-bearing alkoxysilane is isolated and purified to a high purity by distilling a reaction solution containing the (meth)acryloxy-bearing alkoxysilane in a thin-layer distillation device at a temperature of 90-160° C. and a vacuum of 1-15 mmHg. The resulting alkoxysilane product does not give rise to the quality problem that the product will gradually whiten during storage owing to contact with air. The occurrence of self-polymerization of the alkoxysilane is restrained.
    Type: Grant
    Filed: June 18, 1999
    Date of Patent: January 1, 2002
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Katsuhiro Uehara, Mikio Endo, Tohru Kubota, Satoshi Uchida, Kanji Murofushi
  • Publication number: 20010050216
    Abstract: A process for distillative separation of pure (meth)acrylic acid from mixtures which comprise (meth)acrylic acid and dimers and oligomers of (meth)acrylic acid and are essentially free from aldehydes and from components whose boiling point is lower than that of (meth)acrylic acid, using a distillation apparatus which has a thin-film evaporator, a condenser and a connection which contains a baffle device and links the thin-film evaporator and the condenser.
    Type: Application
    Filed: February 22, 1999
    Publication date: December 13, 2001
    Inventors: RUPRECHT KROKER, MANFRED WIEDEMANN
  • Publication number: 20010050217
    Abstract: A (meth)acryloxy-bearing alkoxysilane is isolated and purified to a high purity by distilling a reaction solution containing the (meth)acryloxy-bearing alkoxysilane in a thin-layer distillation device at a temperature of 90-160° C. and a vacuum of 1-15 mmHg. The resulting alkoxysilane product does not give rise to the quality problem that the product will gradually whiten during storage owing to contact with air. The occurrence of self-polymerization of the alkoxysilane is restrained.
    Type: Application
    Filed: June 18, 1999
    Publication date: December 13, 2001
    Inventors: KATSUHIRO UEHARA, MIKIO ENDO, TOHRU KUBOTA, SATOSHI UCHIDA, KANJI MUROFUSHI
  • Patent number: 6258206
    Abstract: A process for evaporating spent liquor or other waste liquids from cellulose cooking, The evaporation is performed in a multiplicity of evaporators which are coupled in series and in which the evaporation is driven using the liquor steam. The condensates from the steam are divided, in one of more effects, into at least two fractions with respect to purity. The parer fraction from one effect is conveyed, at a high level, into a subsequent effect in the direction of movement of the liquor, while the dirtier fraction is conveyed, at a high level or at the very top, into a preceding effect in the direction of movement of the liquor.
    Type: Grant
    Filed: August 19, 1998
    Date of Patent: July 10, 2001
    Assignee: Kvaerner Pulping AB
    Inventors: Lars Gunnar Olausson, Lars Eric Pettersson, Olof Tryggve Wennberg, Anders Henrik Wernqvist
  • Patent number: 6156160
    Abstract: This invention concerns a process to provide high purity alkylene carbonate though use of multiple distillations wherein the unused fractions are recycled to the reactor.
    Type: Grant
    Filed: October 7, 1998
    Date of Patent: December 5, 2000
    Assignee: Huntsman Petrochemical Corporation
    Inventors: Edward T. Marquis, Mercy Mathai Varghese
  • Patent number: 6152994
    Abstract: A process for the purification of an aqueous alkanolamine which process involves subjecting the alkanolamine to a distillation process carried out in one or more film-type evaporators and involves at least two steps, wherein in the first step water is removed from the aqueous alkanolamine and in the second step the de-watered alkanolamine is further purified.
    Type: Grant
    Filed: October 26, 1998
    Date of Patent: November 28, 2000
    Assignee: Shell Oil Company
    Inventors: Petrus Franciscus Antonius Van Grinsven, Gijsbert Jan Van Heeringen
  • Patent number: 6048441
    Abstract: Neopentyl glycol hydroxypivalate (NGH) is isolated from a mixture containing NGH, lower- and higher-boiling products and inorganic salts and purified in a two-stage process, whereinin a first separation stage, the inorganic salts and part of the higher-boiling products are separated off in a wiped-film evaporator and a vapor stream consisting of NGH, lower- and higher-boiling products is discharged and fed to a heat exchanger and condensed therein,and, in a second separation stage, the resulting condensate is distilled in a rectification column from which NGH is taken off in a side stream and condensed. Further discharges of the rectification column containing lower-boiling products or higher-boiling products are separately taken off. The higher-boiling products which comprise residual NGH are partly or completely recycled to the lower region of the rectification column.
    Type: Grant
    Filed: July 24, 1998
    Date of Patent: April 11, 2000
    Assignee: BASF Aktiengesellschaft
    Inventors: Heinz Auer, Siegfried Kruger, Stephan Scholl, Theodor Weber, Johann-Peter Melder
  • Patent number: 5853549
    Abstract: A large and economical type of multi-stack vertical tube evaporator (MS-VTE) having units of multiple stacks of vertical tube bundles or stages mounted in a single vessel, and having its liquid feed pumped to the uppermost VTE bundle stack or stage and having the feed then cascading downward through the lower bundle stacks in series flow, and wherein all the tube bundles are heated with the same waste steam of no or low $-value, e. g. with turbine reject steam in parallel flow under vacuum into the steam-sides of all tube bundles in the unit through a common steam conduit; and wherein the feed liquid is progressively evaporated from stage to stage or stack to stack and the vapors produced in the tubes of each bundle during the partial evaporation of the feed are separated between the stacks and condensed by parallel flow into one or more condensers.
    Type: Grant
    Filed: October 4, 1996
    Date of Patent: December 29, 1998
    Inventor: Hugo H. Sephton
  • Patent number: 5770020
    Abstract: The invention relates to a distillation apparatus (1) which is suitable in particular for the distillation of sea water into fresh water. The apparatus includes a plurality of flat, bag-like elements (3) formed from a thin film material such as plastic film and placed one against the other, the elements serving as heat exchangers between a vaporizing liquid flowing along the exterior surfaces of the element and a condensing vapor directed to the inside of the element, and a compressor (15) for increasing the pressure and temperature of the generated vapor before it is directed to the inside of the elements. The essential idea of the invention is that at the upper end of each bag-like element (3) there is a honeycomb-structured end strip (4) having substantially the width of the element, the strip containing parallel feeding ducts (26) separated from each other by partition walls, the ducts distributing the liquid to be evaporated over the entire width of the element surface.
    Type: Grant
    Filed: November 18, 1996
    Date of Patent: June 23, 1998
    Assignee: Keeran Corporation N.V.
    Inventors: Peter Koistinen, Reijo Rantala
  • Patent number: 5660691
    Abstract: Disclosed is an improved process for the preparation of tocotrienol/tocopherol blend concentrates from vegetable oil distillates which are enriched in tocotrienols. Tocotrienol/tocopherol blend concentrates are obtained containing 20-80% tocotrienols/tocopherols by weight, with an overall recovery of tocotrienols/tocopherols of 72% to 97%. The process is comprised first of an esterification reaction where the more volatile alcohols are converted to their less volatile fatty acid esters, followed by a series of distillation steps where components boiling higher and lower than the tocotrienols/tocopherols are separated from tocotrienols/tocopherols and other like boiling substances. Advantages of the process are that tocotrienol/tocopherol blend concentrates are produced efficiently and economically in a minimum number of steps without the use of solvents and with a relatively small capital investment.
    Type: Grant
    Filed: November 13, 1995
    Date of Patent: August 26, 1997
    Assignee: Eastman Chemical Company
    Inventors: Scott Donald Barnicki, Charles Edwan Sumner, Jr., Hampton Loyd Chip Williams, III
  • Patent number: 5630914
    Abstract: A method for decontaminating a liquid of a contaminant having a vapor pressure which is higher than the vapor pressure of the liquid. A contaminated liquid is directed through an inclined conduit. A gas is directed into the inclined conduit, whereby the gas contacts the liquid and transports the contaminant, which has volatilized in the inclined conduit, out of the inclined conduit, thereby decontaminating the liquid. The liquid is discharged from the inclined conduit.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: May 20, 1997
    Assignee: Pharm-Eco Laboratories, Inc.
    Inventors: Yesh P. Sachdeva, Richard L. Gabriel
  • Patent number: 5628901
    Abstract: A single vessel with no moving parts is constructed to perform the functions of coalescing, vacuum dehydration, and thin film evaporation.
    Type: Grant
    Filed: April 30, 1993
    Date of Patent: May 13, 1997
    Assignee: Castrol Industrial North America Inc.
    Inventors: William L. Lawrence, Robert D. Coyle
  • Patent number: 5582692
    Abstract: A method for the separation and purification in a single pass of a heat or oxygen-sensitive liquid feed, such as a plant derived liquid feed mixture of fatty acids, tocopherol compounds and sterols, into a low boiling point purified fraction of Vitamin E tocopherol compounds and a high boiling point concentrate fraction of triglycerides, which method can be maintained in the presence of an inert gas to provide reduced degradation and increased purity of the Vitamin E fraction.
    Type: Grant
    Filed: October 7, 1994
    Date of Patent: December 10, 1996
    Assignee: Artisan Industries, Inc.
    Inventor: James L. Baird
  • Patent number: 5562808
    Abstract: A method and apparatus are disclosed for decontaminating a liquid surfactant of a dioxane having a vapor pressure which is higher than the surfactant. A contaminated liquid surfactant is directed through an inclined conduit. A gas is directed into the inclined conduit, whereby the gas contacts the surfactant and transports the dioxane contaminant, which has volatilized in the inclined conduit, out of the inclined conduit, thereby decontaminating the surfactant. The liquid surfactant is discharged from the inclined conduit.
    Type: Grant
    Filed: September 21, 1993
    Date of Patent: October 8, 1996
    Assignee: Pharm-Eco Laboratories, Inc.
    Inventors: Yesh P. Sachdeva, Richard L. Gabriel
  • Patent number: 5238964
    Abstract: A method for the treatment of cerebrovascular contraction in mammals involving administration of a pharmaceutical composition containing as an effective ingredient a p-guanidinobenzoic acid derivative represented by the formula ##STR1## wherein R denotes a group represented by the formula ##STR2## or a pharmaceutically acceptable salt thereof, and a pharmaceutically acceptable carrier.
    Type: Grant
    Filed: February 13, 1992
    Date of Patent: August 24, 1993
    Assignee: Torii & Co., Ltd.
    Inventors: Haruhiko Kikuchi, Hiroji Yanamoto