Utilizing Solid Sorbent Patents (Class 203/41)
  • Patent number: 7470349
    Abstract: A device for delivering purified water from a reservoir of salt water including a vapor tube supported concentrically inside a barrier tube The vapor tube has apertures that provide a passage of purified condensate from interior of the purified waste to the space between the space between the outside of the vapor tube and the inside of the barrier tube. A pump between the reservoir of salt water and the interior of the vapor tube generates a pressure differential that forces water vapor from the surface of salt water to the inside of the vapor tube. Condensate inside the vapor tube flows as fresh water to outside the vapor tube.
    Type: Grant
    Filed: April 11, 2006
    Date of Patent: December 30, 2008
    Inventor: Joel Miller
  • Patent number: 7435865
    Abstract: A method for separating a mixture of hydrocarbons into fractions enriched in linear, mono-branched, or multi-branched hydrocarbons is disclosed. In particular, mono-branched alkanes are separated from a mixture of alkanes containing multi-branched, mono-branched and linear alkanes, by selectively adsorbing the mono-branched alkanes on a zeolitic adsorbent. The zeolitic adsorbent MCM-22 is particularly suitable for carrying out the method.
    Type: Grant
    Filed: August 17, 2004
    Date of Patent: October 14, 2008
    Assignee: Vrije Universiteit Brussel
    Inventors: Joeri Denayer, Refik Ocakoglu, Gino Baron
  • Patent number: 7410586
    Abstract: Process for the work-up of a mixture comprising ionic liquids and a further substance, wherein the substance present is separated off by means of adsorptive separation processes.
    Type: Grant
    Filed: March 23, 2004
    Date of Patent: August 12, 2008
    Assignee: BASF Aktiengesellschaft
    Inventors: York Alexander Beste, Jürgen Ciprian, Stephan Maurer
  • Patent number: 7384519
    Abstract: A method for the purification of pharmaceutical grade 1,1,1,2-tetrafluoroethane (HFC-134a) and polymer grade chlorodifluoromethane (HCFC-22) by contacting a mixture containing 1,1,1,2-tetrafluoroethane or chlorodifluoromethane and methyl chloride with a zeolite such as a molecular sieve, and recovering from said contacted mixture substantially purified 1,1,1,2-tetrafluoroethane or chlorodifluoromethane.
    Type: Grant
    Filed: December 23, 2003
    Date of Patent: June 10, 2008
    Assignee: Honeywell International Inc.
    Inventors: Stephen A. Cottrell, Robert E. Wilson
  • Publication number: 20080110743
    Abstract: The present invention relates to methods and systems for processing an exhaust stream containing a recyclable component mixed with other components and impurities to produce a high purity product that contains all of the recyclable component. One or more waste streams containing none of the recyclable component are also produced. The present invention particularly relates to the recovery of valuable recyclable components used in the manufacture of semiconductor devices.
    Type: Application
    Filed: November 14, 2006
    Publication date: May 15, 2008
    Inventor: Walter H. Whitlock
  • Publication number: 20080073201
    Abstract: The present invention relates to improved processes to recover acetonitrile from a diluted aqueous low grade acetonitrile feedstock.
    Type: Application
    Filed: October 28, 2004
    Publication date: March 27, 2008
    Applicant: UCB, S.A.
    Inventors: August Van Gysel, Frans Soeterbroeck, Geert Vermeulen
  • Publication number: 20080029381
    Abstract: The invention relates to a distillation installation comprising a system of columns (1, 3) and means for conveying a flow (7, 9) that is to be separated into one column (1) in said system. According to the invention, at least one segment (A, D) of one column contains structured packings comprising packs having a non-modified interface if, in the operating segment, the rate ratio is below a rate ratio threshold, said rate ratio being the ratio between the real reflux rate and the minimum reflux rate of the segment, and/or the charge ratio is above a charge ratio threshold, said charge ratio being the ratio between a falling flow of liquid and the section of the segment. Moreover, at least one segment (C, G) of a column, which is designed to operate with a rate ratio above the rate ratio threshold and/or with a charge ratio below the charge ratio threshold, contains structured packings comprising packs having at least one modified interface.
    Type: Application
    Filed: April 30, 2004
    Publication date: February 7, 2008
    Inventors: Richard Dubettier, Frederic Judas
  • Patent number: 7255777
    Abstract: Improved HETP is obtained in the operation of a distillation column containing trays with a packing of a porous container containing a particulate material intimately associated with a resilient component having at least 50 volume % open space, preferably at least 70 volume % positioned on the trays compared to the trays without the packing. The packing may contain a catalytic particulate material and the distillation may involve reaction and distillation of the reaction products. The particulate material may also be inert and the distillation of the conventional type to separate components in the distillation mixture without reaction.
    Type: Grant
    Filed: August 19, 2005
    Date of Patent: August 14, 2007
    Assignee: Catalytic Distillation Technologies
    Inventors: Lawrence A. Smith, Jr., Gary R. Gildert, James R. Fair, A. Frank Seibert
  • Patent number: 7182841
    Abstract: This invention concerns a process for removing carbonyl-containing impurities from impure extractive distillation solvent such as a glycol, comprising: contacting the impure extractive distillation solvent with an acidic ion exchange resin. The purified extractive distillation solvent can be recycled for use as a solvent in an extractive distillation process that removes impurities from alkylene oxide. The extractive distillation solvent can be ethylene glycol monomethyl ether (EGME) used to purify propylene oxide.
    Type: Grant
    Filed: April 23, 2003
    Date of Patent: February 27, 2007
    Assignee: Huntsman International LLC
    Inventors: John R. Sanderson, Mark Mueller, James P. Farone
  • Patent number: 7175696
    Abstract: Herein is disclosed a method and an apparatus for preparing a highly purified gas from a crude liquid comprising the gas and one or more of a metal, particulates, water vapor, or a volatile impurity. The method comprises: (a) vaporizing the crude liquid, to yield (i) a first vapor stream comprising the gas and (ii) a first liquid stream comprising the gas; (b) removing water vapor, particulates, or both from the first vapor stream, to yield a second vapor stream comprising the gas; (c) condensing the second vapor stream, to yield a second liquid stream comprising the gas; and (d) sparging the second liquid stream with an inert gas, to yield (i) a third vapor stream comprising the gas and (ii) a third liquid stream comprising the highly purified gas. Also disclosed is a method for preparing an adsorbent to effectively remove water vapor from the gas, as well as an adsorbent so prepared.
    Type: Grant
    Filed: February 18, 2003
    Date of Patent: February 13, 2007
    Assignees: American Air Liquide, Inc., Air Liquide America L.P.
    Inventors: Derong Zhou, John P. Borzio, Gregory M. Jursich, Earle R. Kebbekus
  • Patent number: 7163636
    Abstract: A multi-phase separation system utilized to remove contaminants from fluids includes a pre-filtering module for filtering a contaminated fluid to provide a filtered contaminated fluid. A condenser module receives the filtered contaminated fluid and a contaminated gas phase for condensing the contaminated gas phase to a contaminated liquid. A phase reaction chamber converts the filtered contaminated fluid to a contaminated mist wherein the mist is subjected to a low energy, high vacuum environment for providing a first change of phase by separating into a contaminated gas phase and a liquid mist phase. The contaminated gas phase is carried out of the phase reaction chamber by a carrier air. A vacuum pump provides the low energy, high vacuum environment in the phase reaction chamber and delivers the contaminated gas phase to the condenser module for condensation providing a second change of phase.
    Type: Grant
    Filed: August 19, 2005
    Date of Patent: January 16, 2007
    Assignee: Advanced Phase Separation, LLC
    Inventor: Wayne W. Spani
  • Patent number: 7108771
    Abstract: A process for reducing the level(s) of water and/or other impurities from cyclosiloxanes by either azeotropic distillation, or by contacting the cyclosiloxane compositions with an adsorbent bed material. The purified cyclosiloxane material is useful for forming low-dielectric constant thin films having dielectric constants of less than 3.0, more preferably 2.8 to 2.0.
    Type: Grant
    Filed: December 13, 2001
    Date of Patent: September 19, 2006
    Assignee: Advanced Technology Materials, Inc.
    Inventors: Chongying Xu, Thomas H. Baum, Alexander S. Borovik, Ziyun Wang, James T. Y. Lin, Scott Battle, Ravi K. Laxman
  • Patent number: 7074304
    Abstract: A process for purifying alicyclic alcohols by distillation, wherein the alicyclic alcohols are distilled in the presence of from 1 to 550 ppm of acidic compounds.
    Type: Grant
    Filed: December 13, 2002
    Date of Patent: July 11, 2006
    Assignee: Celanese Chemicals Europe GmbH
    Inventors: Wolfgang Dukat, Peter Lappe, Klaus Schmid, Horst Scholz, Edgar Storm
  • Patent number: 7020984
    Abstract: The invention relates to a device for feeding a drying gas to a mixing granulator comprising a mixing chamber and a rotating agitator (3), on which mixer blades (4) are arranged in a radial position with respect to a drive shaft (5). The feeder line (6) for the drying gas is disposed inside the drive shaft (5) of the agitator (3). An exit line (7) is respectively connected in the region of each mixer blade (4), said line terminating in at least one outlet (8) arranged underneath and, in the direction of rotation, behind the mixer blades (s). The outlet (8) extends advantageously in at least partial manner along the mixer blades (4), embodied in the form of a slit or in a flat manner in the form of a porous element.
    Type: Grant
    Filed: May 31, 2002
    Date of Patent: April 4, 2006
    Assignee: Glatt Systemtechnik Dresden GmbH
    Inventors: Wolfgang Knorr, Barbara Jaensch
  • Patent number: 6977047
    Abstract: A method is provided for manufacturing pharmaceutical water by means of distillation and sanitizing the equipment used in said manufacturing. The method comprises the removal of suspended solids from chlorine-containing water by means of a multimedia filter, followed by a water-softening step and a dechlorination step. Ammonia is then removed from the dechlorinated water before subjecting the water to distillation in a mechanical vapor compression distillation unit. A portion of the generated low-pressure-steam is used to sanitize the manufacturing equipment at certain prescribed locations, and the distilled water, exhibiting United States Pharmacopoeia purified water quality, is withdrawn from the still and stored as pharmaceutical water product. No reverse osmosis operation is required. A system for carrying out the process is also provided. Sanitization is carried out while the system is in a standby mode.
    Type: Grant
    Filed: September 15, 2003
    Date of Patent: December 20, 2005
    Assignee: Mechanical Equipment Company, Inc.
    Inventor: Chet Ray Nunez
  • Patent number: 6964728
    Abstract: Bisphenol-A-bis(neopentylglycolphosphate) products of enhanced properties and processes for preparing them are described. One of the processes includes (a) mixing and reacting neopentyl glycol and bisphenol-A-bis(dichlorophosphate) in an inert polar organic solvent which (1) if mixed by itself with an equal volume of water at 25° C., will form a separate phase, (2) the solvent by itself will dissolve at least about 10 wt % of bisphenol-A-bis(neopentylglycolphosphate) at a temperature in the range of 25 to 50° C., and optionally but preferably (3) the solvent by itself can be completely vaporized at a temperature below about 180° C.; (b) washing bisphenol-A-bis(neopentylglycolphosphate) product formed in a) while dissolved in inert organic solvent having such characteristics at least once with an aqueous alkaline washing solution; and (c) optionally but preferably, recovering bisphenol-A-bis(neopentylglycolphosphate) product from organic solvent having such characteristics.
    Type: Grant
    Filed: May 16, 2002
    Date of Patent: November 15, 2005
    Inventors: Bonnie G. McKinnie, Robert E. Williams, Gary L. Sharp, Alireza M. Dadgar
  • Patent number: 6964730
    Abstract: Disclosed is a purification apparatus and method. The purification apparatus includes: a mobile phase distillation part for distilling a mobile phase; a mobile phase liquefaction part for liquefying the distilled mobile phase; and a purification part disposed between the mobile phase distillation part and the mobile phase liquefaction part, for mixing the mobile phase liquefied at the mobile liquefaction part with to-be-purified material, removing impurities from the mixture through a bonded phase, and sending the impurity-removed purified material to the mobile phase distillation part.
    Type: Grant
    Filed: September 29, 2003
    Date of Patent: November 15, 2005
    Assignee: LG Electronics Inc.
    Inventors: Kyung Hoon Lee, Jeong Dae Seo, Hyoung Yun Oh
  • Patent number: 6905576
    Abstract: This invention relates to a continuous process for the preparation of silane by catalytic disproportionation of trichlorosilane in a reactive/distillative reaction zone having a catalyst bed of catalytically active solid.
    Type: Grant
    Filed: December 14, 1999
    Date of Patent: June 14, 2005
    Assignee: SolarWorld AG
    Inventors: Hans-Dieter Block, Hans-Joachim Leimkühler, Dirk Müller, Johannes-Peter Schäfer, Georg Ronge
  • Publication number: 20040211658
    Abstract: This invention concerns a process for removing carbonyl-containing impurities from impure extractive distillation solvent such as a glycol, comprising: contacting the impure extractive distillation solvent with an acidic ion exchange resin. The purified extractive distillation solvent can be recycled for use as a solvent in an extractive distillation process that removes impurities from alkylene oxide. The extractive distillation solvent can be ethylene glycol monomethyl ether (EGME) used to purify propylene oxide.
    Type: Application
    Filed: April 23, 2003
    Publication date: October 28, 2004
    Applicant: Huntsman Petrochemical Company
    Inventors: John R. Sanderson, Mark Mueller, James P. Farone
  • Patent number: 6673945
    Abstract: This invention provides a method of separating tocopherols by using a weakly basic polyvinyl pyridine resin. The resin has the capacity to selectively bind tocopherols, allowing other impurities typically found in a tocopherol production plant stream to separate from the tocopherols. After loading a tocopherol-containing mixture onto a separatory column packed with the resin, the loaded column is eluted with a solvent followed by an alcohol. The eluate is collected in fractions, and the tocopherol-containing fractions are combined and concentrated to yield a purified tocopherol composition. It has been found that the present invention produces highly purified tocopherol compositions (90+%), and is particularly useful for preparing highly purified tocopherol compositions, specifically enriched in &agr;-tocopherol.
    Type: Grant
    Filed: November 1, 2002
    Date of Patent: January 6, 2004
    Assignee: Archer-Daniels Midland Company
    Inventors: Thomas P. Binder, Ahmad K. Hilaly
  • Publication number: 20040000472
    Abstract: Improved HETP is obtained in the operation of a distillation column containing trays with a packing of a porous container containing a particulate material intimately associated with a resilient component having at least 50 volume % open space, preferably at least 70 volume % positioned on the trays compared to the trays without the packing. The packing may contain a catalytic particulate material and the distillation may involve reaction and distillation of the reaction products. The particulate material may also be inert and the distillation of the conventional type to separate components in the distillation mixture without reaction.
    Type: Application
    Filed: November 20, 2002
    Publication date: January 1, 2004
    Applicant: CATALYTIC DISTILLATION TECHNOLOGIES
    Inventors: Lawrence A. Smith, Gary R. Gildert, James R. Fair, A. Frank Seibert
  • Publication number: 20030213689
    Abstract: A process is described for preventing plugging of distillation equipment when the distillable liquid comprises a mixture of different liquids containing a dissolved substance tending to precipitate from the distillate. An adjuvant is provided to the mixture to be distilled, which adjuvant forms a composition with the dissolved substance that, if isolated, melts at a lower temperature than the distillation temperature.
    Type: Application
    Filed: May 16, 2002
    Publication date: November 20, 2003
    Inventors: Bonnie G. McKinnie, Robert E. Williams, Gary L. Sharp, Alireza M. Dadgar
  • Publication number: 20030116421
    Abstract: A process for reducing the level(s) of water and/or other impurities from cyclosiloxanes by either azeotropic distillation, or by contacting the cyclosiloxane compositions with an adsorbent bed material. The purified cyclosiloxane material is useful for forming low-dielectric constant thin films having dielectric constants of less than 3.0, more preferably 2.8 to 2.0.
    Type: Application
    Filed: December 13, 2001
    Publication date: June 26, 2003
    Inventors: Chongying Xu, Thomas H. Baum, Alexander S. Borovik, Ziyun Wang, James T.Y. Lin, Scott Battle, Ravi K. Laxman
  • Patent number: 6570026
    Abstract: On-spec phthalic anhydride is prepared by distillative purification of crude phthalic anhydride by a process in which crude phthalic anhydride is fed to a distillation column which is operated at reduced pressure, the low boilers are removed at the top or in the vicinity of the top of the distillation column and the on-spec phthalic anhydride is removed from the column via a side take-off.
    Type: Grant
    Filed: February 19, 2002
    Date of Patent: May 27, 2003
    Assignee: BASF Aktiengesellschaft
    Inventors: Werner Peschel, Bernd Bessling, Peter Reuter, Peter Michael Lorz, Bernhard Ulrich, Jean Werner Knab, Matthias Kummer, Thomas Rühl
  • Patent number: 6508915
    Abstract: A distilling apparatus and method use a two step distillation and purification process for processing a waste liquid, such as an impure sulfuric acid solution, to form a highly concentrated sulfuric acid solution. First, the waste liquid is stored in a concentrating column, where it is heated. A condenser, which uses the waste liquid as a cooling medium, condenses the vapor generated by the heater. The condensed vapor is passed through a filter, which separates impurities out of the waste liquid, prior to feeding the waste liquid back into the concentrating column. Water is then removed from the waste liquid via a distilling process. The resulting concentrated liquid is then fed to a purifying column, where it is again heated, to remove residue, and condensed, resulting in a highly pure waste liquid.
    Type: Grant
    Filed: December 17, 1997
    Date of Patent: January 21, 2003
    Assignee: Fujitsu Limited
    Inventors: Hiroshi Osuda, Toru Matoba, Daisuke Adachi, Masataka Fukuizumi
  • Patent number: 6402961
    Abstract: A process for preparing epoxysilanes by reacting a hydrogensilane with an allyl glycidyl ether in the presence of a catalyst and working up the crude product obtained, where the catalyst is removed from the crude product and the crude product is subsequently distilled.
    Type: Grant
    Filed: July 21, 2000
    Date of Patent: June 11, 2002
    Assignee: Degussa AG
    Inventors: Stefan Bade, Uwe Schoen, Hartwig Rauleder
  • Patent number: 6398917
    Abstract: An apparatus for the purification of crude N,N′-diphenyl-p-phenylenediamine (DPPD) in which there is an extraction unit containing a liquid permeable container and an adsorption layer downstream of the container, a solvent evaporator downstream of the adsorption layer, a filter unit, a line for returning the filtrate to the solvent evaporator, and a condenser for returning solvent to the extraction unit.
    Type: Grant
    Filed: January 11, 2000
    Date of Patent: June 4, 2002
    Assignee: Degussa-Huels Aktiengesellschaft
    Inventors: Albert-Johannes Frings, Michael Horn, Peter Jenker, Jaroslaw Monkiewicz, Hans-Guenther Srebny, Burkhard Standke, Bertram Trautvetter
  • Publication number: 20020063052
    Abstract: The invention relates to a novel process for removing arsenic compounds using amino/ammonium-functionalized anion exchangers from the distillation bottoms obtained in the purification of hydrogen fluoride by distillation.
    Type: Application
    Filed: October 4, 2001
    Publication date: May 30, 2002
    Inventors: Axel Peters, Gunter Lailach, Reinhold Klipper
  • Patent number: 6379507
    Abstract: A process for producing methylal that involves feeding a liquid containing methanol, formaldehyde and water to an uppermost reactor of at least four solid acid catalyst-filled reactors which are each externally connected to an intermediate portion of a distillation column; and forcibly circulating a liquid containing methanol, formaldehyde, water and produced methylal in a temperature range of 80° C. to 100° C.
    Type: Grant
    Filed: August 3, 1999
    Date of Patent: April 30, 2002
    Assignee: Asahi Kasei Kabushiki Kaisha
    Inventors: Seinosuke Satoh, Yukio Tanigawa
  • Publication number: 20020029954
    Abstract: A process for separating ethylene glycol from its aqueous mixture with organic acids, salts and unidentified UV light absorbers, the process comprising the steps of
    Type: Application
    Filed: May 31, 2001
    Publication date: March 14, 2002
    Inventors: Hendrikus Jacob Baars, Alouisius Nicolaas Rene Bos, Jelte Kars
  • Patent number: 6332949
    Abstract: A process for concentrating spent sulphuric acids particularly sulphuric acids which arise during the nitration of hydrocarbons with nitric acid in the presence of sulphuric acid, wherein single- or multi-stage concentration is effected under vacuum.
    Type: Grant
    Filed: March 30, 1999
    Date of Patent: December 25, 2001
    Assignee: Bayer Aktiengesellschaft
    Inventors: Heiko Beckhaus, Jürgen Münnig, Wolfgang Lorenz, Karl Schumacher
  • Publication number: 20010022957
    Abstract: A process for purifying anhydrous HF by contacting anhydrous HF containing phosphate impurities with an effective amount of activated carbon so that the phosphate impurities are adsorbed on the activated carbon, and anhydrous hydrogen fluoride having a reduced phosphate impurity content is obtained.
    Type: Application
    Filed: December 19, 2000
    Publication date: September 20, 2001
    Inventors: Somanahalli Naranappa Subbanna, Charles Lewis Redmon, Robert Andrew Smith, Paul Frederick Kunkel
  • Patent number: 6258215
    Abstract: The system for the recovery of water from urine aboard spacecraft includes a urine intake and pretreatment unit, a unit for water reclamation from urine and a condensate purification unit. The unit for water reclamation from urine is made on the basis of a rotary multistage vacuum distiller, each stage of which is formed by at least one heat-transfer plate and comprises an evaporation zone and a condensation zone. The stages of the distiller are separated from each other by separation plates, a chamber for collecting condensate and noncondensable gases being disposed downstream of the last stage and communicated with all the condensation zones of all the stages through water seals of condensate overflow and openings for the removal of noncondensable gases in disks mounted in the condensation zones.
    Type: Grant
    Filed: July 6, 1999
    Date of Patent: July 10, 2001
    Assignee: Otkrytoe aktsionernoe obschestvo “Nauchno-Issledovatelsky I Konstruktosky Institut Kkhimicheskogo Mashinostroenia (A. O. Neikhimmash”)
    Inventors: Nikolai Mikhailovich Samsonov, Leonid Sergeevich Bobe, Vladimir Gustavovich Rifert, Petr Alexeevich Barabash, Vladimir Viktorovich Komolov, Vadim Iliich Margulis, Vladimir Mikhailovich Novikov, Boris Yakovlevich Pinsky, Nikolai Nikolaevich Protasov, Valentin Vasilievich Rakov, Nikolai Sergeevich Farafonov
  • Patent number: 5951829
    Abstract: A method of separating heteropoly compounds from mixtures of polyethers, polyesters and/or polyether esters, a protic component and heteropoly compounds, wherein the protic component is removed from the mixture and subsequently separating off the heteropoly compound as a separate phase. The polymer phase which remains is preferably brought into further contact with a solid adsorbent that is capable of adsorbing heteropoly compounds.
    Type: Grant
    Filed: March 27, 1997
    Date of Patent: September 14, 1999
    Assignee: BASF Aktiengesellschaft
    Inventors: Hans-Jurgen Weyer, Rolf Fischer, Gerhard Jeschek, Herbert Muller
  • Patent number: 5876685
    Abstract: A method for the removal and purification of substantially all of the fluoride ions contained in a solution containing greater than 10 parts per million (ppm) fluoride ion, a mixture of other anions, silicon in the form of a fluorosilicic acid, silicic acid, silicates, or silicon tetrafluoride, and optionally also containing complex metal fluorides, to produce an ultrapure hydrofluoric acid, comprising the steps of (a) adjusting the pH of the solution to an alkaline pH to hydrolyze the fluorosilicic acid and any complex metal fluorides; (b) removing the fluoride ions and other anions from the solution by passing the solution through an ion exchange resin, where the ion exchange resin is adapted to adsorb substantially all of the fluoride passed over the ion exchange resin; (c) displacing the fluoride ions and other anions bound to the ion exchange resin, thereby forming a mixture of anions in an effluent emanating from resin; (d) optionally concentrating the effluent at a high pH and then lowering the pH; and
    Type: Grant
    Filed: September 11, 1996
    Date of Patent: March 2, 1999
    Assignee: IPEC Clean, Inc.
    Inventors: Gerald A. Krulik, John A. Adams, Dieter Dornisch, David W. Persichini, Christopher S. Blatt
  • Patent number: 5873263
    Abstract: Equipment and process for fluid purification and recovery for separating at least two matters contained in a gas or fluid including cooling a fluid to a low temperature range by use of a cooling system so that the matters in the fluid exhibit at least two phases, and filtering at least one of the matters using a filter device. The fluid may be distilled using a heating system prior to its entrance into the cooling system so as to help separate and purify the matters.
    Type: Grant
    Filed: April 17, 1997
    Date of Patent: February 23, 1999
    Assignee: Industrial Technology Research Institute
    Inventor: Ching-Hui Chang
  • Patent number: 5837106
    Abstract: A halohydrocarbon solvent recovery process. The process in one embodiment included heating a gross mixture including solvent, fatty-acid impurities and water in a bath to vaporize at least a portion of the solvent and the impurities. A portion of the vapor is then condensed in a reflux condenser to form a condensate mixture. After drying and impurity adsorption, a solvent product of at least 99% purity may be recovered. In one embodiment, the gross mixture is obtained from steam stripping dry-cleaner filter cartridges.
    Type: Grant
    Filed: December 12, 1994
    Date of Patent: November 17, 1998
    Assignee: Technichem Engineering, Ltd.
    Inventors: Mark J. Ng, Bruce T. Maeda
  • Patent number: 5776319
    Abstract: A method for continuously extracting a solute from a carrier medium. A volatile solvent is placed in a lower distillation chamber of a vessel, the vessel including a convergent baffle disposed to separate the vessel into a lower distillation chamber and an upper extraction chamber. The convergent baffle is contoured to converge to define a conduit riser projecting upwardly into the extraction chamber and terminating in a vaporized solvent port placing the distillation chamber in fluid flow communication with the extraction chamber. A carrier medium containing a solute to be extracted is placed in the extraction chamber. The volatile solvent in the distillation chamber is then vaporized. The vaporized solvent flows upwardly and is converged through the convergent baffle and conduit riser. The converged vapor stream passes through the vaporized solvent port into the carrier medium, flowing through the carrier medium and inducing a linear-torroidal flow in the carrier medium.
    Type: Grant
    Filed: April 16, 1996
    Date of Patent: July 7, 1998
    Assignee: H-O-H Research Inc.
    Inventor: Michael W. Mar
  • Patent number: 5685957
    Abstract: Acidic and salt impurities are removed from a condensed phase obtained from dimethyl carbonate synthesis by obtaining the condensed phase from the effluent of a reactor in which carbon monoxide, oxygen and methanol are reacted to form dimethyl carbonate, the condensed phase containing acid and salt impurities, and partially evaporating the condensed phase in an evaporator thereby preparing an evaporated stream substantially free of impurities and a residual bottom stream.
    Type: Grant
    Filed: May 31, 1995
    Date of Patent: November 11, 1997
    Assignee: Enichem Synthesis S.p.A.
    Inventors: Franco Rivetti, Daniele Delledonne
  • Patent number: 5587055
    Abstract: A water distillation apparatus and method include an improved control system for operation and maintenance, condensers with plastic to metal seals between a plastic condenser manifold and metallic cooling tubes, and a filter with steam bypass to allow for easy sterilization of the filter and remaining distillation system. The control system includes a three pronged probe assembly for monitoring conditions within an evaporation chamber. One of the three probes monitors steam conductivity and provides a steam fault signal to indicate an upper level of contaminants in the steam. A purge pump is responsive to fault signals, including the steam fault signal, to pump water from the evaporation chamber. Improved techniques are also provided for periodically dumping a portion or all of the water in the heating pan to reduce contamination of the system.
    Type: Grant
    Filed: October 21, 1994
    Date of Patent: December 24, 1996
    Assignee: Michael O. Hartman
    Inventors: Michael O. Hartman, Dale J. Kinder, Randy E. Rainey, Arthur R. Helmich, Daniel E. Willis
  • Patent number: 5571387
    Abstract: The present invention is a process for separating at least a first component from a second component of at least a first stream within a single vessel having at least one distillation zone and an adsorption zone. The invention may be applied to separates an alcohol from a mixture of the alcohol and water, such as separating isopropyl alcohol from a mixture of isopropyl alcohol and water. The invention may be applied to more complex systems such as separating isopropyl alcohol and separating diisopropyl ether from the effluents of each reactor of a two-stage diisopropyl ether production process. The benefit of the invention is a high purity separation process at reduced capital equipment costs.
    Type: Grant
    Filed: September 13, 1994
    Date of Patent: November 5, 1996
    Assignee: UOP
    Inventors: Terry L. Marker, Santi Kulprathipanja, Simon H. Hobbs
  • Patent number: 5565066
    Abstract: The present invention is a single vessel apparatus for separating at least a first component from a second component of a process stream. The apparatus has a vertically-elongated vessel which contains a plurality of vertically spaced apart distillation contactors for vapor and liquid distillation and an adsorbent-retaining volume defined at least in part by a solids-impermeable member located above the contactors for passing a fluid into the retaining volume. The apparatus also contains a mechanism for adding adsorbent above the solids-impermeable member and a mechanism for withdrawing adsorbent particles from the retaining volume to contact the fluid with adsorbent particles and to provide at least intermittent downward gravity flow of adsorbent particles through the retaining volume and to selectively adsorb a portion of the fluid.
    Type: Grant
    Filed: October 7, 1994
    Date of Patent: October 15, 1996
    Assignee: UOP
    Inventors: Terry L. Marker, Santi Kulprathipanja, Simon H. Hobbs
  • Patent number: 5547582
    Abstract: A multiple-stage process for the collection and treatment of biological waste, and for rendering the biological waste biologically inactive for the safe and economical environmentally non-contaminating disposal thereof. Moreover, also disclosed is an arrangement for the collection and treatment of biological waste utilizing the inventive process, and is especially adapted for the collection and treatment of biological waste which is generated during a surgical or medical procedure implemented on a patient or during an autopsy.
    Type: Grant
    Filed: February 28, 1995
    Date of Patent: August 20, 1996
    Inventor: Peter J. Waibel
  • Patent number: 5534280
    Abstract: A process for treating a solid food product having water soluble and water insoluble volatiles soluble in alcohol and ether. The process includes cutting the product into pieces, placing the product pieces in a volume of water containing an anti-oxidant, and drawing a vacuum on the product pieces in the water to pull air out of the cells of the product pieces. The vacuum is released to cause water, and the anti-oxidant to enter the cells of the product pieces. The product pieces are then heated to dry the pieces and to drive off a mixture of water vapor or steam and the water soluble and water insoluble volatiles. The mixture is directed through an adsorbent to remove the water soluble and water insoluble volatiles from the mixture by an adsorption. Steam is passed through the adsorbent to remove the water soluble volatiles from the adsorbent. Ethyl alcohol is passed through the adsorbent to remove the alcohol soluble, water insoluble volatiles from the adsorbent.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: July 9, 1996
    Inventor: George Welch
  • Patent number: 5507921
    Abstract: A method and apparatus for quenching a gas stream in the production of vinyl chloride monomer includes the use of a knock back condenser and a plurality of column fractional distillation trays disposed within the quench column, and a liquid stream of 1,2-dichloroethane, vinyl chloride, and hydrogen chloride may be removed from the bottom column fractional distillation tray.
    Type: Grant
    Filed: December 14, 1994
    Date of Patent: April 16, 1996
    Assignee: Westlake Monomers Corporation
    Inventor: James E. Best
  • Patent number: 5507919
    Abstract: An apparatus and method are provided for the defluorination of a liquid hydrocarbon mixture, containing organic fluorides, produced during the conversion of hydrocarbons using a fluorine-containing catalyst. In one embodiment, both a thermal means and a contacting material are used to effectuate a more complete defluorination. The liquid hydrocarbon mixture is extracted from a distillation column and heated sufficiently in the thermal means to decompose at least some of the organic fluorides. The effluent from the thermal means is separated into a vaporous and a liquid effluent. The liquid effluent is passed to the bottom of the distillation column where it undergoes further defluorination through contact with the contacting material.
    Type: Grant
    Filed: August 1, 1994
    Date of Patent: April 16, 1996
    Assignee: Phillips Petroleum Company
    Inventors: Scott D. Love, Stone P. Washer
  • Patent number: 5507920
    Abstract: In the preparation of vinyl chloride by thermal cracking of 1,2-dichloroethane, three distillation stages are used to distill off first hydrogen chloride, then vinyl chloride and finally entrained hydrogen chloride with vinyl chloride. If, in the last stage, entrained water is not drawn off via the bottom, it is recirculated with the top product to the first stage and causes corrosion. Removal of the water at the top of the third distillation stage, advantageously by drying, prevents the corrosion.
    Type: Grant
    Filed: December 7, 1994
    Date of Patent: April 16, 1996
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Peter Schwarzmaier, Peter Kammerhofer, Manfred Stoger, Helmut Kalliwoda, Ingolf Mielke
  • Patent number: 5500098
    Abstract: Volatile acids containing metal salt impurities, such as metal pickling solutions-are regenerated by a process in which the acid is subjected to sulfuric acid distillation. Resulting volatile acid vapor is condensed and recycled to the pickle tank, while the residual acid mixture is treated in an acid sorption unit, preferably of the acid retardation type. Acid sorbed in the acid sorption unit is periodically eluted with water and recycled, while metal impurities are rejected in a deacidified by-product solution.
    Type: Grant
    Filed: August 5, 1993
    Date of Patent: March 19, 1996
    Assignee: Eco-Tec Limited
    Inventors: Craig J. Brown, Michael A. Sheedy
  • Patent number: 5490907
    Abstract: A method for the separation and recovery of volatiles from a sludge containing about 1 to 80% by weight liquid solvents and 20 to 99% by weight solids, in which said sludge is fed with a reagent powder material in an amount effective to form a mixture having a high surface area to a distillation vessel, said mixture is heated to a temperature up to about 350.degree. C. while said mixture is advanced through the vessel for a time sufficient to distil a sufficient portion of the solvents to yield a solid residue powder, distilled solvents are condensed, and the solid residue powder recovered. The vessel preferably is a mechanical fluidized bed distillation vessel and said mixture is fluidized while being heated therein under a partial vacuum in a non-oxidizing atmosphere. The effective amount of reagent powder material includes about 5 to 70 wt % of the reagent powder material.
    Type: Grant
    Filed: October 12, 1993
    Date of Patent: February 13, 1996
    Assignee: Agglo Inc.
    Inventors: Peter Weinwurm, Paul S. Weinwurm
  • Patent number: 5489366
    Abstract: A distillation method for the purification of crude propylene oxide containing contaminating quantities of water and methanol by partially purifying the crude propylene oxide in a plural stage distillation zone to provide a vaporized overhead distillate propylene oxide fraction containing a minor contaminating amount of vaporized water, andpassing the propylene oxide vapor fraction through a drying chamber containing a porous hygroscopic solid absorbent to selectively absorb water vapor onto the absorbent,and liquefying and recovering the thus-dehydrated purified propylene oxide.
    Type: Grant
    Filed: March 28, 1994
    Date of Patent: February 6, 1996
    Assignee: Texaco Chemical Inc.
    Inventor: Huibert S. Jongenburger