Distillation Of Initial Distillate Patents (Class 203/81)
  • Patent number: 9382181
    Abstract: A process for removing a cyclododecanone-rich target fraction (A) from a dehydrogenation mixture (O) comprising low boilers (LB), cyclododecanone (CDON), medium boilers (MB), cyclododecanol (CDOL) and high boilers (HB) is provided. According to the process, substantially pure CDON is obtained via a distillative sequence of two side draw columns connected in series, wherein the sidestream of the primary side draw column is fed into the secondary side draw column. From the top of each of the two side draw columns, a CDON-rich fraction is drawn off, and these are combined to form a target fraction, which is essentially pure CDON.
    Type: Grant
    Filed: December 13, 2013
    Date of Patent: July 5, 2016
    Assignee: EVONIK DEGUSSA GmbH
    Inventors: Luca Cameretti, Daniel Demicoli, Ralf Meier
  • Patent number: 9278898
    Abstract: A process for removing a cyclododecanone-rich fraction from a dehydrogenation mixture containing low boilers, cyclododecanone, medium boilers, cyclododecanol and high boilers is provided. According to the process, the cyclododecanone is separated from the cyclododecanol in a dividing wall column. The apparatus which is the dividing wall column is also provided within this invention.
    Type: Grant
    Filed: December 13, 2013
    Date of Patent: March 8, 2016
    Assignee: EVONIK DEGUSSA GmbH
    Inventors: Luca Cameretti, Daniel Demicoli, Ralf Meier
  • Patent number: 9174848
    Abstract: Processes and systems for purifying silane-containing streams and, in particular, for purifying silane-containing streams that also contain ethylene are disclosed. The processes and systems may be arranged such that one or more ethylene reactors are downstream of light-end distillation operations.
    Type: Grant
    Filed: November 20, 2014
    Date of Patent: November 3, 2015
    Assignee: SunEdison, Inc.
    Inventors: Baisheng Zou, Zhihui Gu
  • Patent number: 9162898
    Abstract: Systems and methods for removing boron-containing contaminants from a composition comprising trichlorosilane to form a purified product comprising trichlorosilane are disclosed. Purification columns and devices, having various locations of inlet and outlet ports, are fluidly connected to each other in order to remove various types of boron species and other impurities present in TCS.
    Type: Grant
    Filed: November 2, 2012
    Date of Patent: October 20, 2015
    Assignee: GTAT Corporation
    Inventors: Bruce Hazeltine, Scott Fahrenbruck, Wenjun Qin
  • Patent number: 9005405
    Abstract: Recovering high purity benzene from hydrocarbon feedstock containing aromatics and non-aromatics is implemented by simple and low-cost modifications to conventional extractive distillation columns (EDCs). Methyl cyclohexane (MCH) that is generated through non-selective hydrogenation of toluene in hydrodesulfurization (HDS) units is a major contaminant in benzene production. To meet MCH specifications, often times the extractive distillation (ED) process for recovering purified benzene is operated with excessive benzene loss to the overhead raffinate stream, producing a lower quality non-aromatic product.
    Type: Grant
    Filed: March 1, 2012
    Date of Patent: April 14, 2015
    Assignees: CPC Corporation, Taiwan, AMT International, Inc.
    Inventors: Kuang-Yeu Wu, Tzong-Bin Lin, Fu-Ming Lee, Tsung-Min Chiu, Jeng-Cheng Lee
  • Publication number: 20150099904
    Abstract: Recovery of ethanol from a crude ethanol product obtained from the hydrogenation of acetic acid using a low energy process. The crude ethanol product is separated in a column to produce a distillate stream comprising acetaldehyde and a residue stream comprising ethanol, acetic acid, ethyl acetate and water. The ethanol product is recovered from the residue stream.
    Type: Application
    Filed: December 15, 2014
    Publication date: April 9, 2015
    Inventors: David Lee, Fred Ronald Olsson, Adam Orosco, Nathan Kirk Powell, Manuel Salado, Lincoln Sarager, R. Jay Warner, Radmila Wollrab, Victor J. Johnston
  • Patent number: 8961744
    Abstract: In a system and method for recycling a high-boiling-point waste photoresist stripper generated in processes of manufacturing LCDs or semiconductor devices, an expensive high-boiling-point stripper solvent can be easily recycled at high yield and high-purity electronic grade.
    Type: Grant
    Filed: February 19, 2014
    Date of Patent: February 24, 2015
    Assignee: Korex Corporation
    Inventors: Ho Kyung Lee, In Gyoo Lee, Myung Jun Park, Kee-Kahb Koo, Jae-Kyeong Kim
  • Publication number: 20150041308
    Abstract: The present invention relates to a dividing wall distillation column for producing high-purity n-butanol, and a method for the production of high-purity n-butanol by fractional distillation. More particularly, the present invention relates to a method which provides a dividing wall distillation column with crude n-butanol as a feed to perform a fractional distillation of n-butanol, and an apparatus thereof. The dividing wall distillation column of the present invention exhibits the effects of a two distillation column from only one distillation column, thereby reducing energy and the costs of installing the apparatus as compared to conventional distillation systems.
    Type: Application
    Filed: August 26, 2014
    Publication date: February 12, 2015
    Inventors: Sung-Kyu LEE, Joon-HO SHIN, Jong-Ku LEE
  • Publication number: 20140343329
    Abstract: The present invention relates to a process for preparing deodorized 1,2-propanediol, to the use of the purified propanediol and to an apparatus for performing the process.
    Type: Application
    Filed: July 11, 2014
    Publication date: November 20, 2014
    Inventors: Stephan Maurer, Roman Prochazka, Oliver Bey, Jochen Steiner, Jochem Henkelmann, Gerhard Theis, Peter Wahl, Frank Heimann
  • Publication number: 20140284202
    Abstract: Distillative process for obtaining ditrimethylolpropane from solutions includes separating ditrimethylolpropane from the solution in a first distillation unit into a first tops fraction comprising low-boiling compounds having a lower boiling point than ditrimethylolpropane and a first bottoms fraction; introducing the first bottoms fraction into a second distillation unit having at least 5 theoretical plates, said unit being configured as a thin-film evaporator with a column attachement and drawing off a second tops fraction comprising intermediate-boiling compounds having a lower boiling point than ditrimethylolpropane as well as withdrawing a second bottoms fraction from the second distillation unit and introducing the second bottoms fraction into a third distillation unit having at least 4 theoretical plates, said unit being configured as a thin-film evaporator with a column attachement, such that ditrimethylolpropane is obtained as a third tops fraction and high boilers are removed as a third bottoms frac
    Type: Application
    Filed: October 24, 2012
    Publication date: September 25, 2014
    Inventors: Guido D. Frey, Norman Nowotny, Kurt Schalapski, Heinz Strutz
  • Publication number: 20140262732
    Abstract: An onsite purification plant/system to delivery high and ultra high purity product, such as, process chemicals, industrial and specialty gases to manufacturing processes within the onsite plant turndown ratio from 0% to 100% while preserving the predetermined purity of the supplied substances within a predefined specification range is provided. Preserving liquid/vapor ratio in at least one of the purification means/units ensuring that product purity range stays unchanged is achieved by redirecting the product back into the onsite purification plant/system.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 18, 2014
    Applicant: Air Products and Chemicals, Inc.
    Inventors: Timothy Edward Conway, Vladimir Yliy Gershtein, Jeffrey Alan Hopkins, Brian M. Lindenmuth, Thomas M. Booth
  • 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
  • Patent number: 8709238
    Abstract: Crude tall oil is subjected to a distillation process that substantially removes impurities. The process produces a combined pitch and a distillate of free fatty acids and rosin acids from two vacuum columns. The distillate stream is amenable to further downstream hydroprocessing.
    Type: Grant
    Filed: May 18, 2012
    Date of Patent: April 29, 2014
    Assignee: UOP LLC
    Inventor: John A. Petri
  • Publication number: 20140058131
    Abstract: This invention relates to processes for producing acetic acid and, in particular, to improved processes for recovering permanganate reducing compounds formed during the carbonylation of methanol in the presence of a carbonylation catalyst to produce acetic acid. Alkyl halides are removed or reduced from the recovered permanganate reducing compounds.
    Type: Application
    Filed: August 21, 2012
    Publication date: February 27, 2014
    Applicant: Celanese International Corporation
    Inventors: Robert Glenn Golightly, Oyeyemi Oyerinde, Mark O. Scates, Ronald D. Shaver
  • Patent number: 8642827
    Abstract: Processes for the separation of a hydrocarbon-containing feed streams are described herein.
    Type: Grant
    Filed: July 17, 2008
    Date of Patent: February 4, 2014
    Assignee: Total Petrochemicals Research Feluy
    Inventor: Bernard Van Der Schrick
  • Publication number: 20140018581
    Abstract: A fermentation liquid feed including water and a product alcohol and optionally CO2 is at least partially vaporized such that a vapor stream is produced. The vapor stream is contacted with an absorption liquid under suitable conditions wherein an amount of the product alcohol is absorbed. The portion of the vapor stream that is absorbed can include an amount of each of the water, the product alcohol and optionally the CO2. The temperature at the onset of the absorption of the vapor stream into the absorption liquid can be greater than the temperature at the onset of condensation of the vapor stream in the absence of the absorption liquid. The product alcohol can be separated from the absorption liquid whereby the absorption liquid is regenerated. The absorption liquid can include a water soluble organic molecule such as an amine.
    Type: Application
    Filed: September 23, 2013
    Publication date: January 16, 2014
    Applicant: BUTAMAX ADVANCED BIOFUELS LLC
    Inventors: Michael Charles Grady, William D. Parten, Robert W. Sylvester, Joseph J. Zaher
  • Patent number: 8628643
    Abstract: A fermentation liquid feed including water and a product alcohol and optionally CO2 is at least partially vaporized such that a vapor stream is produced. The vapor stream is contacted with an absorption liquid under suitable conditions wherein an amount of the product alcohol is absorbed. The portion of the vapor stream that is absorbed can include an amount of each of the water, the product alcohol and optionally the CO2. The temperature at the onset of the absorption of the vapor stream into the absorption liquid can be greater than the temperature at the onset of condensation of the vapor stream in the absence of the absorption liquid. The product alcohol can be separated from the absorption liquid whereby the absorption liquid is regenerated. The absorption liquid can include a water soluble organic molecule such as an amine.
    Type: Grant
    Filed: August 10, 2011
    Date of Patent: January 14, 2014
    Assignee: Butamax Advanced Biofuels LLC
    Inventors: Michael Charles Grady, William D. Parten, Robert W. Sylvester, Joseph J. Zaher
  • Publication number: 20130334029
    Abstract: A dividing wall distillation column for producing high-purity 2-ethyl hexanol including a condenser, a reboiler and a main column having a dividing wall. The main column is divided into a column-top zone, an upper feed zone, an upper outflow zone, a lower feed zone, a lower outflow zone and a column-bottom zone. A crude 2-ethyl hexanol raw material (F) flows in a middle inflow plate NR1 in which the upper feed zone and the lower feed zone come in contact with each other, a low boiling point component (D) flows out from the column-top zone, a high boiling point component (B) flows out from the column-bottom zone, and a middle boiling point component (S) flows out through a middle outflow plate NR2 in which the upper outflow zone and the lower outflow zone come in contact with each other, where the middle boiling point component is 2-ethyl hexanol.
    Type: Application
    Filed: July 16, 2013
    Publication date: December 19, 2013
    Inventors: Sung Kyu LEE, Jong Ku LEE, Joon Ho SHIN
  • Patent number: 8562792
    Abstract: Dividing wall fractional distillation columns and methods of operating these columns with greater flexibility, especially in terms of the ability to adjust the composition of the heartcut, intermediate or sidecut product fraction, are described. In particular, this composition may be advantageously “biased” toward higher or lower molecular weight components, depending on operating needs. Changes in feedstock composition may also be managed more effectively. These benefits are obtained by varying the flow rate of vapor and liquid to each side of the dividing wall. The vapor flowrate rising from an undivided portion of the column interior below the dividing wall is varied to the feed and/or product sections on opposite sides of the dividing wall. Also, the liquid flowrate falling from an undivided portion of the column interior above the dividing wall is varied to the feed and/or product sections on opposite sides of the dividing wall.
    Type: Grant
    Filed: October 28, 2010
    Date of Patent: October 22, 2013
    Assignee: UOP LLC
    Inventors: Stephen Thomas King, Joe Haas
  • Patent number: 8551298
    Abstract: Processes and systems for purifying silane-containing streams are disclosed with relatively less silane being lost in impurity streams by use of distillation and/or condensation operations.
    Type: Grant
    Filed: September 27, 2011
    Date of Patent: October 8, 2013
    Assignee: MEMC Electronic Materials, Inc.
    Inventors: Timothy Dinh Truong, Zhihui Gu, Puneet Gupta
  • Patent number: 8545703
    Abstract: Process and steps for the production of biodiesel and/or glycerin from feedstock are provided.
    Type: Grant
    Filed: November 27, 2012
    Date of Patent: October 1, 2013
    Assignee: Menlo Energy Management, LLC
    Inventors: Gaurav Shah, Sunil Suri
  • Patent number: 8545702
    Abstract: Process and steps for the production of biodiesel and/or glycerin from feedstock are provided.
    Type: Grant
    Filed: November 27, 2012
    Date of Patent: October 1, 2013
    Assignee: Menlo Energy Management, LLC
    Inventors: Gaurav Shah, Sunil Suri
  • Patent number: 8540881
    Abstract: Process and steps for the production of biodiesel and/or glycerin from feedstock are provided.
    Type: Grant
    Filed: November 27, 2012
    Date of Patent: September 24, 2013
    Assignee: Menlo Energy Management, LLC
    Inventors: Gaurav Shah, Sunil Suri
  • Patent number: 8540880
    Abstract: Process and steps for the production of biodiesel and/or glycerin from feedstock are provided.
    Type: Grant
    Filed: November 27, 2012
    Date of Patent: September 24, 2013
    Assignee: Menlo Energy Management, LLC
    Inventors: Gaurav Shah, Sunil Suri
  • Patent number: 8524048
    Abstract: Processes and systems for purifying silane-containing streams are disclosed with relatively less silane being lost in impurity streams by use of distillation and/or condensation operations.
    Type: Grant
    Filed: October 5, 2010
    Date of Patent: September 3, 2013
    Assignee: MEMC Electronic Materials, Inc.
    Inventors: Zhihui Gu, Timothy D. Truong, Puneet Gupta
  • Publication number: 20130206577
    Abstract: For the distillation of temperature-sensitive liquids, in particular acrylic acid and its esters, the liquid is heated in a column and at least partly evaporated. The vapor is guided through a condenser provided inside the column, in which the vapor is at least partly condensed. The condensed liquid is at least partly withdrawn from the column. The distillation is characterized in that the vapor not condensed yet is guided through the condenser cocurrently to the condensed liquid.
    Type: Application
    Filed: June 8, 2011
    Publication date: August 15, 2013
    Applicant: Lurgi GmbH
    Inventors: Jochen Bauer, Frank Castillo-Welter, Klaus Kirsten, Markus Kreich, Christoph Steden, Dominic Walter, Rudolf Zeyen
  • Publication number: 20130211030
    Abstract: The present invention relates to water and solvent-free polymers, in particular water and solvent-free synthetic rubber products like styrene butadiene rubber products and butadiene rubber products as well as a process for the production thereof. The invention further relates to a device suitable to accomplish said process.
    Type: Application
    Filed: March 23, 2011
    Publication date: August 15, 2013
    Applicant: LANXESS DEUTSCHLAND GMBH
    Inventors: Paul Wagner, Hanns-Ingolf Paul, Rolf Feller, Wolfgang Krumbe, Alicia Le-Sattler, Heike Kloppenburg, Martin Siebuerger, John Lovegrove
  • Publication number: 20130211031
    Abstract: The present invention relates to specific water and solvent-free nitrile rubbers having specific functional groups and/or end groups, a process for the production thereof and the use thereof. This process involves removing volatile compounds from a fluid (F) containing (1) at least one nitrile rubber and (2) at least one volatile compound, wherein the process comprises at least the steps of a.) treating the fluid (F) in at least one conversation unit, b.) retreating the concentrated fluid from step a.) in at least one retreating unit and c.) feeding the retreated concentrated fluid from step b.) into at least one retreating unit.
    Type: Application
    Filed: March 21, 2011
    Publication date: August 15, 2013
    Applicants: LANXESS INTERNATIONAL S.A., LANXESS DEUTSCHLAND GMBH
    Inventors: Matthias Soddemann, Werner Obrecht, Franz-Josef Mersmann, Hanns-Ingolf Paul, Paul Wagner, Rolf Feller, Thomas Köenig, Jörg Kirchhoff, Werner Bäcker, John Lovegrove
  • Publication number: 20130046113
    Abstract: Purifying and/or recovery of ethanol from a crude ethanol product obtained from the hydrogenation of acetic acid. Separation and purification processes of crude ethanol mixture are employed to allow recovery of ethanol and remove impurities. In addition, the process involves returning acetaldehyde separated from the crude ethanol product to the reactor.
    Type: Application
    Filed: September 11, 2012
    Publication date: February 21, 2013
    Applicant: CELANESE INTERNATIONAL CORPORATION
    Inventors: Radmila Wollrab, Nathan Bower, Josefina T. Chapman, Gerald Grusendorf, Victor J. Johnston, Lincoln Sarager, R. Jay Warner, Heiko Weiner
  • Publication number: 20130035522
    Abstract: A process for reducing ethyl acetate and/or diethyl acetal concentration of a crude ethanol product by hydrolysis is disclosed. A portion of the water is initially separated from the crude ethanol product in a first column residue. Ethyl acetate in the first column distillate is hydrolyzed to form additional ethanol and acetic acid. Product ethanol is recovered in a second distillation column preferably in a side stream and acetic acid is removed in the second column residue.
    Type: Application
    Filed: August 3, 2011
    Publication date: February 7, 2013
    Applicant: CELANESE INTERNATIONAL CORPORATION
    Inventors: Adam Orosco, Manuel Salado, Lincoln Sarager, R. Jay Warner, Trinity Horton
  • Publication number: 20130035519
    Abstract: To reduce acetal and/or ester concentrations when separating ethanol from a crude product in one or more distillation column, at least one of the columns is operated at a higher pressure to increase the equilibrium constant that favors hydrolysis of the acetal. The crude product may comprise ethanol, acetaldehyde, water, ethyl acetate and one or more acetals, such as diethyl acetal. The acetal and/or ester concentration may be reduced thus reducing the need to separate acetal and/or ester from the crude product.
    Type: Application
    Filed: August 3, 2011
    Publication date: February 7, 2013
    Applicant: CELANESE INTERNATIONAL CORPORATION
    Inventors: David LEE, Adam OROSCO, Lincoln SARAGER, Victor J. JOHNSTON
  • Publication number: 20130035518
    Abstract: To reduce acetal concentrations when separating ethanol from a crude product in one or more distillation column, at least one of the columns is operated at a higher pressure to increase the equilibrium constant that favors hydrolysis of the acetal. The crude product may comprise ethanol, acetaldehyde, water and one or more acetals, such as diethyl acetal. The acetal concentration may be reduced thus reducing the need to separate acetal from the crude product.
    Type: Application
    Filed: August 3, 2011
    Publication date: February 7, 2013
    Applicant: CELANESE INTERNATIONAL CORPORATION
    Inventors: David LEE, Adam OROSCO, Lincoln SARAGER, R. Jay WARNER, Victor J. JOHNSTON
  • Publication number: 20130035523
    Abstract: To reduce acetal concentrations when separating ethanol from a crude product in one or more distillation column, at least one of the columns is operated at a higher pressure to increase the equilibrium constant that favors hydrolysis of the acetal. The crude product may comprise ethanol, acetaldehyde, water and one or more acetals, such as diethyl acetal. The acetal concentration may be reduced thus reducing the need to separate acetal from the crude product.
    Type: Application
    Filed: August 3, 2011
    Publication date: February 7, 2013
    Applicant: CELANESE INTERNATIONAL CORPORATION
    Inventors: David Lee, Adam Orosco, Lincoln Sarager, R. Jay Warner, Radmila Jevtic, Victor J. Johnston
  • Publication number: 20130018197
    Abstract: The present invention provides certain improvements in methods for processing vegetable oils and apparatus for carrying out such methods. One embodiment provides a method for processing a partially processed oil including glycerides and a volatilizable impurity fraction. The partially processed oil may processed by driving off a first volatiles stream comprising a portion of the glycerides and at least a portion of the volatilizable impurity fraction, leaving a deodorized oil. The first volatiles stream may be introduced into a first condensing chamber and a glyceride-rich, impurity-poor first condensate may be condensed from the first volatiles stream, leaving a glyceride-poor, impurity-rich second volatiles stream. The second volatiles stream may be passed into a second condensing chamber and a glyceride-poor, impurity-rich second condensate may be condensed from the second volatiles stream.
    Type: Application
    Filed: July 18, 2012
    Publication date: January 17, 2013
    Applicant: Cargill, Incorporated
    Inventor: Marco KRUIDENBERG
  • Publication number: 20120277490
    Abstract: Recovery of ethanol from a crude ethanol product obtained from the hydrogenation of acetic acid using a low energy process. The crude ethanol product is separated in a column to produce a distillate stream comprising acetaldehyde and a residue stream comprising ethanol, acetic acid, ethyl acetate and water. The ethanol product is recovered from the residue stream.
    Type: Application
    Filed: November 9, 2011
    Publication date: November 1, 2012
    Applicant: Celanese International Corporation
    Inventors: David Lee, Fred Ronald Olsson, Adam Orosco, Nathan Kirk Powell, Manuel Salado, Lincoln Sarager, R. Jay Warner, Radmila Jevtic, Victor J. Johnston
  • Publication number: 20120277487
    Abstract: A process for purifying an ethanol stream that comprises byproduct, such as aldehyde, acetals, and/or esters, but withdrawing a sidestream comprising ethanol from a distillation column. The sidestream may have a reduced concentration of aldehyde that reduces the formation of acetals in subsequent purification of the ethanol stream.
    Type: Application
    Filed: August 3, 2011
    Publication date: November 1, 2012
    Applicant: CELANESE INTERNATIONAL CORPORATION
    Inventors: David Lee, Adam Orosco, Lincoln Sarager, R. Jay Warner, Radmila Jevtic
  • Publication number: 20120267233
    Abstract: Provided is a distillation column assembly combining two distillation columns used in a distillation process. The distillation column assembly is characterized in that a dividing wall column (DWC) that has one inflow point, three outflow points and an internal dividing wall and a typical distillation column that has two inflow points and two outflow points are sequentially connected to each other, and in that streams of the two outflow points of the DWC are introduced into the two inflow points of the typical distillation column. The distillation column assembly improves an existing process apparatus based on two distillation columns, so that it can be easily installed, has a high energy-saving effect, and can be applied to the case where a separation pressure difference and a utility temperature difference are great.
    Type: Application
    Filed: July 19, 2010
    Publication date: October 25, 2012
    Inventors: Sung Kyu Lee, Jong Ku Lee, Joon Ho Shin
  • Publication number: 20120261252
    Abstract: Disclosed herein are processes for separation of 2,3,3,3-tetrafluoropropene and hydrogen fluoride using azeotropic distillation. Additionally, disclosed are processes for separating mixtures of 2,3,3,3-tetrafluoropropene, hydrogen fluoride and 1,1,1,2,3-pentafluoropropane (HFC-245eb) and/or 1,1,1,2,2-pentafluoropropane (HFC-245cb) by azeotropic distillation.
    Type: Application
    Filed: February 19, 2009
    Publication date: October 18, 2012
    Applicant: E.I. DU PONT DE NEMOURS AND COMPANY
    Inventor: Jeffrey P. Knapp
  • Publication number: 20120241309
    Abstract: A closed loop process for recovering purified processing fluid from contaminated processing fluid. The contaminated processing fluid is subjected to a first separation step, and there is recovered a first stream comprising the bulk of the processing fluid substantially free of contaminants, and a second stream containing processing fluid with concentrated levels of contaminants. The second stream is subjected to a second separation zone to produce a third stream comprising purified processing fluid and a fourth stream comprising contaminants.
    Type: Application
    Filed: November 2, 2010
    Publication date: September 27, 2012
    Inventor: Michael G. Millard
  • Publication number: 20120241308
    Abstract: A thermal distillation system comprises heating means and cooling means arranged to heat and cool, respectively, treatable liquid in a liquid circuit having a first section between a heating means output and cooling means input, and a second section between an a cooling means output and heating means input, and further comprises distillation stages, each including an evaporator on the first section and a condenser on the second section in heat exchange relationship with liquid in the second section, a carrier gas circuit, on which the evaporator and condenser are arranged, and an output for outputting liquid extracted, wherein the stages are arranged such that their evaporators are disposed along the first section in a direction from the heating means to the cooling means and their condensers are disposed in corresponding order along the second section in a direction from the heating means to the cooling means.
    Type: Application
    Filed: September 21, 2010
    Publication date: September 27, 2012
    Applicant: Phoenix Water
    Inventors: Peter M. Urwin, Michael John O'Connell, Kathryn Moira Wilson, Glenn Rees
  • Publication number: 20120228116
    Abstract: An evaporator or distillation apparatus includes an inlet supply line for supplying an influent liquid, a heater configured to heat the influent liquid supplied by the inlet supply line, and a plurality of cells. Each cell includes an outer surface defining an interior chamber, an inlet, a vapor outlet, a concentrate outlet, and an inner conduit in fluid communication with the inlet. At least a portion of the inner conduit is positioned within the interior chamber. The vapor outlets of the plurality of cells are connected to each other in a parallel configuration and the inlet supply line is connected to the inlet of each cell.
    Type: Application
    Filed: March 8, 2011
    Publication date: September 13, 2012
    Applicant: ENVIRONMENTAL PROCESS SOLUTIONS LLC
    Inventor: Michael Presutti
  • Patent number: 8246791
    Abstract: A method and apparatus for separating draw solution solutes and product solvent from a draw solution using a plurality of distillation columns is disclosed. In one embodiment, the draw solution is used in a Forward Osmosis (FO) water desalination process. In this embodiment, the draw solution is directed to the plurality of distillation columns in parallel while the energy stream (heat) is directed to the plurality of distillation columns in series such that the efficiency of heat use is improved and in turn the cost of the heat is reduced.
    Type: Grant
    Filed: June 7, 2007
    Date of Patent: August 21, 2012
    Assignee: Yale University
    Inventors: Robert L. McGinnis, Menachem Elimelech
  • Publication number: 20120193214
    Abstract: The invention relates to a process for purifying chlorosilanes by distillation, which includes providing a boron-containing mixture of chlorosilanes containing TCS, DCS and STC and purifying the mixture of chlorosilanes by distillation in a plurality of distillation columns, wherein low-boiling boron compounds are branched off from the distillation columns by means of overhead streams containing boron-enriched DCS and high-boiling boron compounds are branched off by means of a boron-enriched bottom stream containing high boilers.
    Type: Application
    Filed: January 26, 2012
    Publication date: August 2, 2012
    Applicant: WACKER CHEMIE AG
    Inventors: Uwe PAETZOLD, Walter HAECKL, Jan PROCHASKA
  • Publication number: 20120157695
    Abstract: Crude fluoroethylene carbonate obtained by the fluorination of ethylene carbonate and elemental fluorine containing not more than 5% by weight of HF is purified by at least two subsequent distillation steps. The bulk of HF can be removed, if desired, in a preliminary HF removal step, e.g., by stripping, before performing the distillation. Further, if desired, a second HF removal step can be performed by contacting the crude mixture or the distillate obtained after the first distillation step with an adsorbent for HF, e.g., silica gel. The distillation can be performed batch wise. It is preferred to perform the distillation continuously. It yields purified fluoroethylene carbonate with an HF content of equal to or less than 30 ppm. The purified fluoroethylene carbonate can be applied as solvent additive for lithium ion batteries.
    Type: Application
    Filed: August 17, 2010
    Publication date: June 21, 2012
    Applicant: SOLVAY FLUOR GMBH
    Inventors: Alain Lambert, Christoph Sommer, Harald Krueger, Jens Olschimke
  • Patent number: 8187361
    Abstract: Purified SiHCl3 and/or SiCl4 are used as a sweep gas across a permeate side of a gas separation membrane receiving effluent gas from a polysilicon reactor. The combined sweep gas and permeate is recycled to the reactor.
    Type: Grant
    Filed: July 2, 2009
    Date of Patent: May 29, 2012
    Assignee: America Air Liquide, Inc.
    Inventors: Sarang Gadre, Madhava R. Kosuri
  • Publication number: 20120116140
    Abstract: The invention is a method for processing a mixture containing water, 3-methyl-1-butene and at least one other methylbutene. The method comprises primary distillation of the mixture, giving a gaseous primary overhead product containing methylbutene and water and a water-free primary bottom product containing 3-methyl-1-butene; condensation of the gaseous primary overhead product so as to give a condensate comprising a liquid aqueous phase and a liquid organic phase; separation of the condensate into a liquid aqueous phase and a liquid organic phase; discharge of the liquid aqueous phase; recirculation of the organic phase to the primary distillation; and finally secondary distillation of the water-free primary bottom product from the primary distillation so as to give a secondary overhead product comprising 3-methyl-1-butene and a secondary bottom product. The secondary overhead product obtained has a purity which enables it to be used directly as monomer or comonomer for preparing polymers or copolymers.
    Type: Application
    Filed: April 29, 2010
    Publication date: May 10, 2012
    Applicant: EVONIK OXENO GMBH
    Inventors: Markus Winterberg, Alfred Kaizik, Armin Rix, Michael Grass, Wilfried Bueschken, Marc Becker
  • Publication number: 20120080304
    Abstract: Processes and systems for purifying silane-containing streams are disclosed with relatively less silane being lost in impurity streams by use of distillation and/or condensation operations.
    Type: Application
    Filed: October 5, 2010
    Publication date: April 5, 2012
    Applicant: MEMC ELECTRONIC MATERIALS, INC.
    Inventors: Zhihui Gu, Timothy D. Truong, Puneet Gupta
  • Publication number: 20120010447
    Abstract: Recovery of ethanol from a crude ethanol product obtained from the hydrogenation of acetic acid and recovery of unreacted acetic acid from a weak acid stream. The unreacted acetic acid may be recovered as a dry acetic acid composition and may be directly or indirectly fed to the hydrogenation reactor.
    Type: Application
    Filed: April 26, 2011
    Publication date: January 12, 2012
    Applicant: CELANESE INTERNATIONAL CORPORATION
    Inventors: R. Jay WARNER, Trinity HORTON, Radmila JEVTIC, Victor J. JOHNSTON, David LEE, Adam OROSCO, Lincoln SARAGER
  • Publication number: 20120010438
    Abstract: Recovery of alcohols, in particular ethanol, from a crude ethanol product obtained from the hydrogenation of acetic acid using a reduced energy process. The crude ethanol product may be fed to a distillation column in which a substantial portion of the water is removed with the acetic acid in the residue. The ethanol product is obtained from the distillate.
    Type: Application
    Filed: April 26, 2011
    Publication date: January 12, 2012
    Applicant: CELANESE INTERNATIONAL CORPORATION
    Inventors: David LEE, Adam OROSCO, Nathan POWELL, Manuel SALADO, Lincoln SARAGER, R. Jay WARNER, Trinity HORTON, Radmila JEVTIC, Victor JOHNSTON