Purification Or Recovery Patents (Class 549/541)
  • Patent number: 10035782
    Abstract: A process for recovering an ethylene oxide (EO) enriched product stream from fat absorbent (FA) comprising water, EO, and acetaldehyde. The process comprises passing a feed of FA from a loopgas EO absorber to a multi-stage countercurrent distillation zone, the feed of FA having a concentration of EO in the range of from about 1 to about 15 wt % upon entering the distillation zone; and obtaining from the distillation zone an acetaldehyde enriched stream, a lean absorbent (LA) stream, a vapor stream enriched in light ends, a glycol enriched bottoms stream and an EO enriched product stream. Suitable apparatus is also disclosed.
    Type: Grant
    Filed: September 29, 2015
    Date of Patent: July 31, 2018
    Assignee: SHELL OIL COMPANY
    Inventor: Timothe Johannes Olthof
  • Patent number: 9879113
    Abstract: The invention relates to compositions of ?,?-branched alkane carboxylic acids glycidyl esters with a define isomeric composition where the sum of the concentration of the blocked and of the highly branched isomers is at least 50%, preferably above 60% and most preferably above 75% on total composition.
    Type: Grant
    Filed: December 16, 2011
    Date of Patent: January 30, 2018
    Assignee: HEXION INC.
    Inventors: Christophe Steinbrecher, Cedric Le Fevere De Ten Hove, Robert Van't Sand, Denis Heymans, Aleksandra Joanna Kotlewska
  • Patent number: 9169226
    Abstract: There is provided a process for manipulating the amount of alkyl alcohol in a product stream, e.g., such as an alkylene oxide product stream. More particularly, and in contrast to conventional processes wherein substantially all of the alkyl alcohol must be separated and desirably recycled, in the present process, a greater amount of alkyl alcohol may be allowed to remain in a partially refined alkylene oxide product stream. The residual alkyl alcohol is subsequently substantially entirely reacted to form a downstream product, e.g., a glycol ether, which is more easily separated from the alkylene oxide product stream. Indeed, the amount of alkyl alcohol in the partially refined alkylene oxide product stream can be selected based upon the output of glycol ethers, if desired.
    Type: Grant
    Filed: June 28, 2011
    Date of Patent: October 27, 2015
    Assignee: DOW GLOBAL TECHNOLOGIES LLC
    Inventors: Tina L. Arrowood, Derrick W. Flick, John F. Ackford
  • Publication number: 20150141548
    Abstract: The present invention provides methods of making a low viscosity C15 alkenyl group containing diglycidyl ether composition comprising at least partially distilling a mixture of one or more C15 alkenyl group containing monoglycidyl ether and one or more C15 alkenyl group containing diglycidyl ether in the presence of a free radical inhibitor to remove at least some of the C15 alkenyl group containing monoglycidyl ether. The methods enable high solids, low viscosity epoxy resins from a renewable source. The present invention also provides compositions of C15 alkenyl group containing diglycidyl ether adducts of a polyamine.
    Type: Application
    Filed: November 17, 2014
    Publication date: May 21, 2015
    Inventors: Ray E. Drumright, Robert E. Hefner, JR.
  • Patent number: 8981133
    Abstract: The disclosure relates to a process for separating propylene oxide for a crude propylene oxide stream, for example an intermediate stream from a PO/TBA process. The crude propylene oxide stream can be passed through an extractive distillation column. The distillation column is operated at a pressure in a range of greater than 25 up to 50 psig, and/or at a temperature in a range of from 70 to 150 degrees Celsius using C8-C20 paraffin as extractive solvent with an overhead distillate water wash drum. The crude propylene oxide stream include from 0.001 to 0.1 wt % methanol, based on the total composition of the crude propylene oxide stream. The systems, methods, and apparatuses can produce a propylene oxide stream having less formaldehyde and acetaldehyde than the prior art.
    Type: Grant
    Filed: June 7, 2011
    Date of Patent: March 17, 2015
    Assignees: Lyondell Chemical Technology, L.P., Equistar Chemicals, LP
    Inventors: Xiangmin Li, David W. Leyshon, Te Chang
  • Publication number: 20150031905
    Abstract: A propylene oxide separation system that comprises a distillation column, a decanter, and water wash system. The distillation column is configured to receive a crude propylene oxide stream, discharge an impurity stream that comprises methanol and water, and discharge a bottoms stream that comprises a majority of the propylene oxide entering in the crude propylene oxide stream. The decanter is configured to receive at least a portion of the impurity stream and a hydrocarbon solvent to provide for formation in the decanter of an organic phase and an aqueous phase. The organic phase comprises propylene oxide and hydrocarbon solvent, and is sent to the distillation column. The aqueous phase comprises a majority weight percent of the methanol and the water entering in the impurity stream. The water wash system is configured to receive and purge the aqueous phase from the propylene oxide separation system.
    Type: Application
    Filed: July 21, 2014
    Publication date: January 29, 2015
    Inventors: Xiangmin Li, Te Chang, David W. Leyshon, Walter S. Dubner, Elizabeth I. Ross-Medgaarden
  • Patent number: 8877017
    Abstract: The present invention provides a novel method for separating hexafluoropropylene oxide (HFPO) from hexafluoropropylene (HFP), which is capable of reducing the burden on the environment. A mixture including HFPO and HFP is subjected to an extractive distillation operation using, as a solvent, at least one of a fluorine-containing saturated compound represented by the general formula CnHaFb (wherein n, a and b are integers which satisfy: n=3 to 8, 0?a?2n+1, and 1?b?2n+2) thereby separating into a first fraction including HFPO and a second fraction including HFP and the solvent. At least one of 1-bromopropane and 2-bromopropane may be u as the solvent in place of the fluorine-containing saturated compound.
    Type: Grant
    Filed: February 18, 2010
    Date of Patent: November 4, 2014
    Assignee: Daikin Industries, Ltd.
    Inventors: Hideki Nakaya, Kazuyoshi Ichihara, Yasuhide Senba, Mikio Nakagoshi, Kazunori Morimoto
  • Patent number: 8845863
    Abstract: Processes and systems for purifying ethylene oxide, including introducing a feed stream including ethylene oxide to a heat exchanger to heat the feed stream, feeding the heated feed stream to a distillation apparatus base below a first stage, removing from the distillation apparatus an impurity fraction as a top exit stream from the distillation apparatus located at a top take-off on the distillation apparatus, removing from the distillation apparatus an ethylene oxide stream of 99.7 weight percent purity, based on the total weight of the ethylene oxide stream, from the distillation apparatus, and removing from the distillation apparatus an aldehyde enriched fraction as a bottom stream from the distillation apparatus, where the aldehyde enriched fraction is fed directly to a glycol reactor.
    Type: Grant
    Filed: July 24, 2009
    Date of Patent: September 30, 2014
    Assignee: Dow Technology Investments LLC
    Inventors: Clarence P. Stadlwieser, Bernie B. Osborne, John P. Dever, Harvey E. Andresen, Michael L. Hutchison, Steven R. Osborne, Liping L. Zhang, Michael Habenschuss, Andrew Addie, Donald R. Culp
  • Patent number: 8834855
    Abstract: The invention concerns methods of treating or preventing the effects of irradiation in a human or non-human animal using carotenoid compounds, preferably diadinoxanthin, diatoxanthin and/or fucoxanthin as well as photoprotective compositions and their use to prepare photoprotective or photoprotected products.
    Type: Grant
    Filed: January 23, 2006
    Date of Patent: September 16, 2014
    Assignee: Promar AS
    Inventors: Geir Johnsen, Per Age Lysaa, Kristin Aamodt
  • Patent number: 8829212
    Abstract: Use a centrifuge, especially a peeler centrifuge, that has a coarse salt particle layer deposited on its screen to effect recovery of an epoxy resin, especially a liquid epoxy resin, from a product slurry, which epoxy resin has a lower residual salt content than an epoxy resin recovered without use of the coarse salt particle layer.
    Type: Grant
    Filed: September 9, 2009
    Date of Patent: September 9, 2014
    Assignee: Dow Global Technologies LLC
    Inventors: Shuji Maeda, Ryosuke Tamai, Takashi Ikeda, Joseph Weber
  • Publication number: 20130310583
    Abstract: Embodiments of the present disclosure include a process for separating phases of a mixture including a liquid aqueous phase, a liquid organic phase, and a solid phase and extracting at least an oxirane from the liquid aqueous phase with an extraction solvent.
    Type: Application
    Filed: February 3, 2012
    Publication date: November 21, 2013
    Applicant: Dow Global Technologies LLC
    Inventors: Philip J. Carlberg, Hannah L. Crampton, Joe J. Longoria
  • Patent number: 8476464
    Abstract: Embodiments of the present disclosure provide processes, columns, and systems for removing acetaldehyde from alkylene oxide in a feed stream and for providing an alkylene oxide-water stream that can be directly transferred to a glycol reaction process. The alkylene oxide purification column includes a first section to convert a feed stream into a gas phase portion and a liquid phase portion and a second section located in the column above the first section to separate alkylene oxide from the acetaldehyde, water, and other impurities that enter the second section from the first section.
    Type: Grant
    Filed: August 6, 2012
    Date of Patent: July 2, 2013
    Assignee: Dow Technology Investments LLC
    Inventors: John F. Szul, James H. McCain, Floyd L. Pfeffer, Harvey E. Andresen, Phillip R. Fairchild, Kent E. Newman
  • Publication number: 20130123408
    Abstract: Plasticizers are made from oil with a narrowed, fatty acid polydispersity and extracted from a microorganism, such as a natural or genetically modified bacterium or algae. These plasticizers can comprise either a large content of either saturated C4 and/or C6 triglycerides or unsaturated C12 or greater triglycerides that have been chemically modified by one or more of epoxidation, acylation and esterification. The plasticizers of this invention are particularly well-suited for use with polar polymeric resins such as PVC.
    Type: Application
    Filed: July 28, 2011
    Publication date: May 16, 2013
    Inventors: Brian R. Maurer, Robert F. Eaton, Dirk B. Zinkweg, Suh Joon Han
  • Patent number: 8404873
    Abstract: A new purification technique for alkylene oxides is described. The technique is safer than previously reported methods and does not require cooling of the purification vessel. In a solution of a high-boiling point solvent and butyllithium, an alkylene oxide is added and allowed to react at ambient temperature. The impurities readily react with the butyllithium while the alkylene oxide does not. The low-boiling alkylene oxide is then easily distilled out of the high-boiling point solvent as a pure material ready for use in controlled polymerization reactions.
    Type: Grant
    Filed: April 9, 2010
    Date of Patent: March 26, 2013
    Assignee: Seeo, Inc
    Inventor: Hany Basam Eitouni
  • Patent number: 8389750
    Abstract: The invention is a method of purifying propylene oxide containing acetone, water, methanol, methyl formate, aldehydes, and hydrocarbons impurities. The method comprises contacting the propylene oxide with a glycol and a C7 or greater alkane in a liquid/liquid solvent extraction, and separating propylene oxide having reduced impurities content. The purified propylene oxide may be produced by reacting propylene and a hydroperoxide to produce a crude propylene oxide effluent, distilling the crude effluent to produce a propylene oxide stream which contains 1-5 weight percent of the impurities, contacting the propylene oxide stream with a glycol and a C7 or greater alkane in a liquid/liquid solvent extraction, then separating an alkane fraction comprising propylene oxide from a glycol fraction, and distilling the alkane fraction in one or more steps to produce an alkane bottoms stream and a propylene oxide product having less than 0.1 weight percent impurities.
    Type: Grant
    Filed: September 28, 2010
    Date of Patent: March 5, 2013
    Assignee: Lyondell Chemical Technology, L.P.
    Inventor: Gary A. Sawyer
  • Patent number: 8378130
    Abstract: Product containing epichlorohydrin and at least one alkyl glycidyl ether in an amount of less than 0.1 g/kg of product. Use of the product containing epichlorohydrin in the manufacture of epoxy resins, of glycidyl ethers, of glycidyl esters, of glycidyl amides, of glycidyl imides, of products that will be used in food and drink applications, of cationization agents, and of flame retardants, of products which will be used as detergent ingredient and of epichlorohydrin oligomers.
    Type: Grant
    Filed: June 11, 2008
    Date of Patent: February 19, 2013
    Assignee: SOLVAY (Societe Anonyme)
    Inventors: Noel Boulos, Philippe Krafft, Patrick Gilbeau, Dominique Balthasart
  • Patent number: 8343433
    Abstract: Apparatus, methods, and processes are provided for a tube reactor including multiple, substantially parallel reaction tubes arranged within a tube reactor shell, the reaction tubes spaced apart such that a thermal fluid can flow between the tubes and transfer heat between the tubes and the thermal fluid during operation; an inlet head defining an inlet head space, where the inlet head space is in fluid communication with an inlet end of the reaction tubes, and an outlet head including an outlet head shell and at least one insert positioned within an outlet head space defined by the outlet head, where the insert defines a reduced volume outlet head space relative to that defined by the outlet head, and where the reduced volume outlet head space is in fluid communication with an outlet end of the reaction tubes and in fluid communication with a reactor outlet.
    Type: Grant
    Filed: December 8, 2008
    Date of Patent: January 1, 2013
    Assignee: Dow Technology Investments LLC
    Inventors: Fred A. Conneway, Harvey E. Andresen, Clarence P. Stadlwieser, Donald L. Kurle, Bernie B. Osborne
  • Publication number: 20120302776
    Abstract: Embodiments of the present disclosure provide processes, columns, and systems for removing acetaldehyde from alkylene oxide in a feed stream and for providing an alkylene oxide-water stream that can be directly transferred to a glycol reaction process. The alkylene oxide purification column includes a first section to convert a feed stream into a gas phase portion and a liquid phase portion and a second section located in the column above the first section to separate alkylene oxide from the acetaldehyde, water, and other impurities that enter the second section from the first section.
    Type: Application
    Filed: August 6, 2012
    Publication date: November 29, 2012
    Applicant: DOW TECHNOLOGY INVESTMENTS LLC
    Inventors: John F. Szul, James H. McCain, Floyd L. Pfeffer, Harvey E. Andresen, Phillip R. Fairchild, Kent E. Newman
  • Patent number: 8304564
    Abstract: The invention relates to a process for removing poly(propylene oxide) from propylene oxide by membrane separation, wherein a membrane having an average pore size of from 0 to 5 nm is used. In said process, a liquid feed comprising propylene oxide and poly(propylene oxide) may be separated by the membrane into a permeate comprising propylene oxide and either no poly(propylene oxide) or poly(propylene oxide) at a concentration which is lower than the poly(propylene oxide) concentration in the feed, and a retentate comprising propylene oxide and poly(propylene oxide) at a concentration which is higher than the poly(propylene oxide) concentration in the feed.
    Type: Grant
    Filed: December 18, 2007
    Date of Patent: November 6, 2012
    Assignee: Shell Oil Company
    Inventors: Johannes Gerhardus Joseph Beckers, Johannes Leendert Willem Cornelis Den Boestert, Nigel Wagstaff
  • Patent number: 8299280
    Abstract: A process for recovering hexafluoropropylene and hexafluoropropylene oxide from a liquid mixture of these components is provided. The process includes, in a stripping stage, contacting the mixture with a gaseous stripping agent, thereby to strip hexafluoropropylene from the mixture. A gaseous product comprising hexafluoropropylene and gaseous stripping agent is withdrawn from the stripping stage, as is a liquid product comprising hexafluoropropylene oxide.
    Type: Grant
    Filed: October 27, 2009
    Date of Patent: October 30, 2012
    Assignee: University of Kwazulu-Natal
    Inventors: Deresh Ramjugernath, Paramespri Naidoo, Clinton Shalendra Subramoney, Michael Wayne Nelson
  • Patent number: 8257558
    Abstract: Embodiments of the present disclosure provide processes, columns, and systems for removing acetaldehyde from alkylene oxide in a feed stream and for providing an alkylene oxide-water stream that can be directly transferred to a glycol reaction process. The alkylene oxide purification column includes a first section to convert a feed stream into a gas phase portion and a liquid phase portion and a second section located in the column above the first section to separate alkylene oxide from the acetaldehyde, water, and other impurities that enter the second section from the first section.
    Type: Grant
    Filed: July 24, 2009
    Date of Patent: September 4, 2012
    Assignee: Dow Technology Investments LLC
    Inventors: John F. Szul, James H. Mccain, Floyd L. Pfeffer, Harvey E. Andresen, Phillip R. Fairchild, Kent E. Newman
  • Patent number: 8183400
    Abstract: Embodiments of the present disclosure include processes and systems for recovering alkylene oxide. System embodiments include a stripping section located in an alkylene oxide recovery column to convert a feed stream comprising to a first gas phase portion comprising alkylene oxide, a condensing zone comprising at least a first condenser and a second condenser configured in series, and a reabsorption region located in the alkylene oxide recovery column above the last of the at least two condensers.
    Type: Grant
    Filed: July 24, 2009
    Date of Patent: May 22, 2012
    Assignee: Dow Technology Investments LLC
    Inventors: John F. Szul, James H. Mccain, Floyd L. Pfeffer, Harvey E. Andresen, Phillip R. Fairchild, Kent E. Newman
  • Patent number: 8163942
    Abstract: The invention relates to purification of (2S,3S)-3-[[(1S)-1-isobutoxymethyl-3-methylbutyl]carbamoyl]oxirane-2-carboxylic acid [hereinafter, referred to as the carboxylic acid] using the salt of the carboxylic acid with an organic amine selected from the group consisting of piperazine, adamantane amines and others. The invention also relates to providing crystalline sodium salt of the carboxylic acid. The sodium salt is usable as a material for preparing medicaments and improved in storage stability, and has the following characteristics: DSC: exothermic peak observed at a temperature in the range of 170 to 175° C. with weight decrease; and characteristic absorption bands of infrared absorption spectrum (KBr tablet): 3255, 2950, 2860, 1670, 1630, 1550, 1460, 1435, 1395, 1365, 1310, 1260, 1110, 890 cm?1.
    Type: Grant
    Filed: September 13, 2010
    Date of Patent: April 24, 2012
    Assignee: Velcura Therapeutics, Inc.
    Inventors: Atsushi Tendo, Toshihiro Takahashi, Tomio Yamakawa, Kazuki Okai, Susumu Nihashi
  • Publication number: 20120077999
    Abstract: The invention relates to a method for the selective extraction of functionalised fatty acid esters from seeds of oleaginous plants, wherein said method includes: a) at least one step of extracting fatty acid esters that comprises simultaneously feeding into a reactor containing said seeds a light anhydrous alcohol, a basic catalyst and an extraction solvent non-miscible with said light alcohol and in which said functionalised fatty ester is not soluble in order to obtain a mixture of esters and glycerol; b) and at least one step of selectively extracting hydroxylated fatty acid esters by feeding into the reactor said extraction solvent in a backflush direction relative to the light alcohol in order to obtain an alcohol phase enriched with fatty acid esters, a glycerol phase and a cake.
    Type: Application
    Filed: January 13, 2010
    Publication date: March 29, 2012
    Applicant: Arkema France
    Inventors: Antoine Piccirilli, Jacques Barbier, Julien Magne, Jean-Luc Dubois
  • Publication number: 20120077996
    Abstract: The invention is a method of purifying propylene oxide containing acetone, water, methanol, methyl formate, aldehydes, and hydrocarbons impurities. The method comprises contacting the propylene oxide with a glycol and a C7 or greater alkane in a liquid/liquid solvent extraction, and separating propylene oxide having reduced impurities content. The purified propylene oxide may be produced by reacting propylene and a hydroperoxide to produce a crude propylene oxide effluent, distilling the crude effluent to produce a propylene oxide stream which contains 1-5 weight percent of the impurities, contacting the propylene oxide stream with a glycol and a C7 or greater alkane in a liquid/liquid solvent extraction, then separating an alkane fraction comprising propylene oxide from a glycol fraction, and distilling the alkane fraction in one or more steps to produce an alkane bottoms stream and a propylene oxide product having less than 0.1 weight percent impurities.
    Type: Application
    Filed: September 28, 2010
    Publication date: March 29, 2012
    Inventor: Gary A. Sawyer
  • Patent number: 8129551
    Abstract: The invention relates to improved systems for recovery of alkylene oxide from feed streams containing the same in an alkylene oxide recovery column. The invention also relates to improved processes for recovery of alkylene oxide from feed streams containing the same in an alkylene oxide recovery column.
    Type: Grant
    Filed: July 24, 2009
    Date of Patent: March 6, 2012
    Assignee: Dow Technology Investments LLC
    Inventors: John F. Szul, James H. Mccain, Floyd L. Pfeffer, Harvey E. Andresen, Phillip R. Fairchild, Kent E. Newman
  • Patent number: 8093412
    Abstract: A method of purifying propylene oxide, which comprises subjecting the propylene oxide containing methyl formate as an impurity to extractive distillation using a hydrocarbon of 7 to 10 carbon atoms as an extractant with an extractive distillation column, adding water to the distillate from the overhead of the extractive distillation column to conduct oil-water separation, recycling the oil layer separated to the extractive distillation column, removing the aqueous layer outside the system thereby to obtain propylene oxide in which a methyl formate concentration is reduced as a bottom liquid of the extractive distillation column.
    Type: Grant
    Filed: June 21, 2005
    Date of Patent: January 10, 2012
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Toshio Nakayama, Junpei Tsuji, Noriaki Oku, Koji Shinohara
  • Patent number: 8080678
    Abstract: The invention is a method of purifying propylene oxide containing 25-100 ppm aldehyde impurities. The method comprises contacting the propylene oxide in the liquid phase with an amine-functionalized ion exchange resin, and recovering a purified propylene oxide product containing 10 ppm, or less, aldehydes.
    Type: Grant
    Filed: April 1, 2010
    Date of Patent: December 20, 2011
    Assignee: Lyondell Chemical Technology, L.P.
    Inventors: Xiangmin Li, Lawrence M. Candela, Brian A Salisbury
  • Patent number: 8071798
    Abstract: Process for the recovery of ethylene oxide (EO) from fat absorbent (FA) which comprises providing a feed of elevated temperature FA to an EO Stripper, providing a stripping gas feed and contacting the stripping gas feed at elevated temperature with the elevated temperature FA feed, obtaining stripped lean absorbent (LA) and an EO-containing gas, and providing one or more external process stream feeds to the EO Stripper at a location above the elevated temperature FA feed and at a lower temperature with respect to the elevated temperature FA feed thereby concentrating EO in the EO-containing gas. The process can also include one or more impurity removal stages in the form of one or more side draws from the EO Stripper or an EO Stripper Concentrator. The invention also includes an apparatus for performing the process.
    Type: Grant
    Filed: August 25, 2009
    Date of Patent: December 6, 2011
    Assignee: Shell Oil Company
    Inventors: Willem Johan Beekman, Peter Boons, Wiebren Age Miedema, Dominicus Maria Rekers
  • Patent number: 8053586
    Abstract: Systems and processes for recovering alkylene oxide, including an alkylene oxide recovery column including a stripping section located in the column to convert a portion of a feed stream to a gas phase including alkylene oxide; a reabsorption section in the column above the stripping section including a water stream to reabsorb the alkylene oxide in the gas phase portion and to produce an aqueous solution, a first stripping gas to strip carbon dioxide and oxygen from the aqueous solution by converting a portion of the aqueous solution to a gaseous portion, producing an alkylene oxide stream, and a side take-off located at a bottom portion of the reabsorption section for removal of the alkylene oxide stream; a condenser to partially condense the gas phase portion; and a top take-off for removal of a light impurity fraction.
    Type: Grant
    Filed: July 24, 2009
    Date of Patent: November 8, 2011
    Assignee: Dow Technology Investments LLC
    Inventors: Bernie B. Osborne, Fred A. Conneway, Clarence P. Stadlwieser, Harvey E. Andresen
  • Publication number: 20110245519
    Abstract: The invention is a method of purifying propylene oxide containing 25-100 ppm aldehyde impurities. The method comprises contacting the propylene oxide in the liquid phase with an amine-functionalized ion exchange resin, and recovering a purified propylene oxide product containing 10 ppm, or less, aldehydes.
    Type: Application
    Filed: April 1, 2010
    Publication date: October 6, 2011
    Inventors: Xiangmin Li, Lawrence M. Candela, Brian A. Salisbury
  • Publication number: 20110144362
    Abstract: The invention relates to anhydrides, solvates and ethanol hetero-solvates and hydrates of dimethoxy docetaxel or (2R,3S)-3-tert-butoxycarbonylamino-2-hydroxy-3-phenyl-propionate of 4-acetoxy-2?-benzoyloxy-5?,20-epoxy-1-hydroxy-7?, 10?-dimethoxy-9-oxo-tax-11-ene-13?-yl, and to the preparation thereof.
    Type: Application
    Filed: July 16, 2010
    Publication date: June 16, 2011
    Applicant: AVENTIS PHARMA S.A.
    Inventors: Pascal Billot, Marielle Dufraigne, Hagit Elmaleh, Alexandre Giuliani, Fabrice Mangin, Patricia Rortais, Lionel Zaske
  • Patent number: 7956205
    Abstract: Disclosed is a method for the reduction of residual peroxides in vegetable oils, preferably epoxidized vegetable oils using a phosphorous compound preferably alkyl/aryl substituted phosphite compounds or hypophosphorous acid and its derivatives.
    Type: Grant
    Filed: December 5, 2006
    Date of Patent: June 7, 2011
    Assignee: Galata Chemicals, LLC
    Inventors: Michael G. Denoux, Ritchie Tregre, Garrett Mineo
  • Patent number: 7932409
    Abstract: A process for producing oleochemical polyols comprises the steps of epoxidizing unsaturated oil using an organic acid together with oxygenated water or a per-acid to obtain epoxidized oil; washing the epoxidized oil with salt water to remove unused organic acid together with oxygenated water or a per-acid; neutralizing acidic condition of the washed epoxidized oil with a base; washing the neutralized epoxidized oil with a salt solution until the pH of the neutralized epoxidized oil reaching 6.5 to 7.5 to removed the base residue; drying the washed neutralized epoxidized oil under vacuum; and reacting the washed neutralized dried epoxidized oil with polyhydric alcohol in the presence of boron trifluoride-diethylether complex to produce the oleochemical polyols. The oleochemical polyols are then subjected to the same washing, neutralizing, washing and drying process as in preparing the washed neutralized dried epoxidized oil.
    Type: Grant
    Filed: March 28, 2008
    Date of Patent: April 26, 2011
    Assignee: Malaysian Palm Oil Board
    Inventors: Hazimah Abu Hassan, Tuan Noor Maznee Tuan Ismail, Mohd Norhisham Sattar, Seng Soi Hoong, Tian Lye Ooi, Salmiah Ahmad, Kosheela Devi a/p Poo Palam, Mei Yee Cheong
  • Patent number: 7851514
    Abstract: The invention provides a process for producing a recycled resin, which includes: a first step of decomposing a resin composition containing a thermosetting resin in a supercritical or subcritical solvent having a monomer constituting the thermosetting resin or a derivative thereof as an essential component and a second step of adding a polyfunctional compound thereto to process; a recycled resin or a processed and recovered matter obtained according to the process for producing; a recycled resin composition formed from a recycled resin and/or a processed and recovered matter of the resin composition; and a method for recycling a resin composition, which reuses said recycled resin and/or said processed and recovered matter of a resin composition as a raw material of a recycled resin composition.
    Type: Grant
    Filed: September 12, 2005
    Date of Patent: December 14, 2010
    Assignee: Sumitomo Bakelite Company, Ltd.
    Inventors: Junya Goto, Masaki Ishikawa, Kazunori Shimoyachi
  • Patent number: 7795458
    Abstract: The invention relates to purification of (2S,3S)-3-[[(1S)-1-isobutoxymethyl-3-methylbutyl]carbamoyl]oxirane-2-carboxylic acid [hereinafter, referred to as the carboxylic acid] using the salt of the carboxylic acid with an organic amine selected from the group consisting of piperazine, adamantane amines and others. The invention also relates to providing crystalline sodium salt of the carboxylic acid. The sodium salt is usable as a material for preparing medicaments and improved in storage stability, and has the following characteristics: DSC: exothermic peak observed at a temperature in the range of 170 to 175° C. with weight decrease; and characteristic absorption bands of infrared absorption spectrum (KBr tablet) 3255, 2950, 2860, 1670, 1630, 1550, 1460, 1435, 1395, 1365, 1310, 1260, 1110, 890 cm?1.
    Type: Grant
    Filed: August 21, 2009
    Date of Patent: September 14, 2010
    Assignee: Nippon Chemiphar Co., Ltd
    Inventors: Atsushi Tendo, Toshihiro Takahashi, Tomio Yamakawa, Kazuki Okai, Susumu Nihashi
  • Patent number: 7718040
    Abstract: Product propylene oxide in a reaction mixture resulting from the reaction of propylene, oxygen and hydrogen or from the reaction of propylene and hydrogen peroxide is separated from propylene and/or propane by extractive distillation using methanol and/or water extractive distillation solvent.
    Type: Grant
    Filed: March 23, 2007
    Date of Patent: May 18, 2010
    Assignee: Lyondell Chemical Technology, L.P.
    Inventor: Te Chang
  • Publication number: 20100105932
    Abstract: A process for recovering hexafluoropropylene and hexafluoropropylene oxide from a liquid mixture of these components is provided. The process includes, in a stripping stage, contacting the mixture with a gaseous stripping agent, thereby to strip hexafluoropropylene from the mixture. A gaseous product comprising hexafluoropropylene and gaseous stripping agent is withdrawn from the stripping stage, as is a liquid product comprising hexafluoropropylene oxide.
    Type: Application
    Filed: October 27, 2009
    Publication date: April 29, 2010
    Applicant: UNIVERSITY OF KWAZULU-NATAL
    Inventors: Deresh Ramjugernath, Paramespri Naidoo, Clinton Shalendra Subramoney, Michael Wayne Nelson
  • Patent number: 7705167
    Abstract: A process for purifying propylene oxide, which comprises washing propylene oxide containing aldehydes and subsequently contacting an aqueous phase obtained with an extractant.
    Type: Grant
    Filed: September 15, 2004
    Date of Patent: April 27, 2010
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Koji Shinohara, Toshio Nakayama
  • Publication number: 20100094032
    Abstract: Process for the recovery of ethylene oxide (EO) from fat absorbent (FA) which comprises providing a feed of elevated temperature FA to an EO Stripper, providing a stripping gas feed and contacting the stripping gas feed at elevated temperature with the elevated temperature FA feed, obtaining stripped lean absorbent (LA) and an EO-containing gas, and providing one or more external process stream feeds to the EO Stripper at a location above the elevated temperature FA feed and at a lower temperature with respect to the elevated temperature FA feed thereby concentrating EO in the EO-containing gas. The process can also include one or more impurity removal stages in the form of one or more side draws from the EO Stripper or an EO Stripper Concentrator. The invention also includes an apparatus for performing the process.
    Type: Application
    Filed: August 25, 2009
    Publication date: April 15, 2010
    Inventors: Willem Johan BEEKMAN, Peter Boons, Wiebren Age Miedema, Dominicus Maria Rekers
  • Patent number: 7692031
    Abstract: A method of separating propylene oxide from a mixture (M) comprising propylene oxide and methanol, said method comprising: (i) introducing said mixture (M) into an extractive distillation column; (ii) additionally introducing an extracting solvent into said extractive distillation column; (iii) distilling propylene oxide overhead from said extractive distillation column as top stream; (iv) withdrawing a bottoms stream from said extractive distillation column; (v) compressing the top stream obtained overhead in (iii) by means of at least one compressor to give a compressed vapor.
    Type: Grant
    Filed: July 6, 2005
    Date of Patent: April 6, 2010
    Assignees: BASF Aktiengesellschaft, The Dow Chemical Company
    Inventors: Hans-Georg Goebbel, Henning Schultz, Peter Schultz, Renate Patrascu, Malte Schulz, Meinolf Weidenbach
  • Publication number: 20100063306
    Abstract: Systems and processes for recovering alkylene oxide, including an alkylene oxide recovery column including a stripping section located in the column to convert a portion of a feed stream to a gas phase including alkylene oxide; a reabsorption section in the column above the stripping section including a water stream to reabsorb the alkylene oxide in the gas phase portion and to produce an aqueous solution, a first stripping gas to strip carbon dioxide and oxygen from the aqueous solution by converting a portion of the aqueous solution to a gaseous portion, producing an alkylene oxide stream, and a side take-off located at a bottom portion of the reabsorption section for removal of the alkylene oxide stream; a condenser to partially condense the gas phase portion; and a top take-off for removal of a light impurity fraction.
    Type: Application
    Filed: July 24, 2009
    Publication date: March 11, 2010
    Inventors: Bernie B. Osborne, Fred A. Conneway, Clarence P. Stadlwieser, Harvey E. Andresen
  • Publication number: 20100029962
    Abstract: Embodiments of the present disclosure provide processes, columns, and systems for removing acetaldehyde from alkylene oxide in a feed stream and for providing an alkylene oxide-water stream that can be directly transferred to a glycol reaction process. The alkylene oxide purification column includes a first section to convert a feed stream into a gas phase portion and a liquid phase portion and a second section located in the column above the first section to separate alkylene oxide from the acetaldehyde, water, and other impurities that enter the second section from the first section.
    Type: Application
    Filed: July 24, 2009
    Publication date: February 4, 2010
    Inventors: John F. Szul, James H. Mccain, Floyd L. Pfeffer, Harvey E. Andresen, Phillip R. Fairchild, Kent E. Newman
  • Publication number: 20100029963
    Abstract: The invention relates to improved systems for recovery of alkylene oxide from feed streams containing the same in an alkylene oxide recovery column. The invention also relates to improved processes for recovery of alkylene oxide from feed streams containing the same in an alkylene oxide recovery column.
    Type: Application
    Filed: July 24, 2009
    Publication date: February 4, 2010
    Inventors: John F. Szul, James H. McCain, Floyd L. Pfeffer, Harvey E. Andresen, Phillip R. Fairchild, Kent E. Newman
  • Patent number: 7598406
    Abstract: Process for the recovery of ethylene oxide (EO) from fat absorbent (FA) which comprises providing a feed of elevated temperature FA to an EO Stripper, providing a stripping gas feed and contacting the stripping gas feed at elevated temperature with the elevated temperature FA feed, obtaining stripped lean absorbent (LA) and an EO-containing gas, and providing one or more external process stream feeds to the EO Stripper at a location above the elevated temperature FA feed and at a lower temperature with respect to the elevated temperature FA feed thereby concentrating EO in the EO-containing gas. The process can also include one or more impurity removal stages in the form of one or more side draws from the EO Stripper or an EO Stripper Concentrator. The invention also includes an apparatus for performing the process.
    Type: Grant
    Filed: May 10, 2006
    Date of Patent: October 6, 2009
    Assignee: Shell Oil Company
    Inventors: Willem Johan Beekman, Peter Boons, Wiebren Age Miedema, Dominicus Maria Rekers
  • Patent number: 7594979
    Abstract: A process of separating a purified propylene oxide from a crude epoxidation product produced, preferably, in an epoxidation reaction of propylene with hydrogen peroxide. The process involves removing bulk water, bulk methanol, and unreacted propylene from the crude epoxidation product and thereafter subjecting the resulting propylene oxide product to extractive distillation with water as an extraction solvent. Under distillation conditions, including a bottoms temperature of greater than about 55° C. and less than about 75° C., an overhead or side-cut distillate stream containing a purified propylene oxide is obtained with low yield loss of propylene oxide to propylene glycols and other glycol heavies. The purified propylene oxide can be further purified in a finishing distillation to obtain propylene oxide meeting commercial grade purity requirements.
    Type: Grant
    Filed: March 4, 2004
    Date of Patent: September 29, 2009
    Assignee: Dow Global Technologies, Inc.
    Inventors: Renate Patrascu, Sabrina Astori, Meinolf M. Weidenbach
  • Patent number: 7585988
    Abstract: The invention relates to purification of (2S,3S)-3-[[(1S)-1-isobutoxymethyl-3-methylbutyl]carbamoyl]oxirane-2-carboxylic acid [hereinafter, referred to as the carboxylic acid] using the salt of the carboxylic acid with an organic amine selected from the group consisting of piperazine, adamantane amines and others. The invention also relates to providing crystalline sodium salt of the carboxylic acid. The sodium salt is usable as a material for preparing medicaments and improved in storage stability, and has the following characteristics: DSC: exothermic peak observed at a temperature in the range of 170 to 175° C. with weight decrease; and characteristic absorption bands of infrared absorption spectrum (KBr tablet): 3255, 2950, 2860, 1670, 1630, 1550, 1460, 1435, 1395, 1365, 1310, 1260, 1110, 890 cm?1.
    Type: Grant
    Filed: April 22, 2004
    Date of Patent: September 8, 2009
    Assignee: Nippon Chemiphar Co., Ltd.
    Inventors: Atsushi Tendo, Toshihiro Takahashi, Tomio Yamakawa, Kazuki Okai, Susumu Nihashi
  • Publication number: 20090215912
    Abstract: A decomposition reaction apparatus for the decomposition treatment of a thermosetting resin, which comprises a reaction apparatus comprising an introduction section for introducing a resin composition containing the thermosetting resin and a solvent containing a monomer component of the thermosetting resin or a component similar to the monomer component, a decomposition reaction section for heating and pressuring the resin composition and the above solvent so as for the solvent to have a supercritical state or a subcritical state, to thereby prepare a treated and recovered product containing a recycled resin formed by the reduction of the molecular weight of the above thermosetting resin, and a discharge section for discharging the treated and recovered product.
    Type: Application
    Filed: October 7, 2005
    Publication date: August 27, 2009
    Applicant: SUMITOMO BAKELITE COMPANY LIMITED
    Inventors: Junya Goto, Sumiya Miyake, Masaki Ishikawa, Kazunori Shimoyachi
  • Patent number: 7569710
    Abstract: An improved process for the recovery of a high-purity, ethylene oxide-water stream for use as feed to integrated ethylene glycol or ethylene oxide purification reactors by first contacting the gaseous effluent from ethylene oxide reactors with an aqueous alkaline quench solution water wash, then absorbing ethylene oxide from the washed vapor into process water to produce a dilute EO-water absorbate of which 10-90% is sent directly to the EO reabsorber/residual absorber, thereby bypassing the EO stripper.
    Type: Grant
    Filed: February 23, 2008
    Date of Patent: August 4, 2009
    Inventor: Brian Ozero
  • Publication number: 20090159841
    Abstract: A process to recover optically active epoxy alcohols from asymmetric epoxidation reaction mixtures such as those produced using the Sharpless method of epoxidation of allylic alcohols. The process includes adding a reducing agent to reduce an organic hydroperoxide in the asymmetric epoxidation reaction product to a corresponding alcohol to form a reduced epoxidation reaction mixture; adding the reduced reaction product to a film evaporation unit to form a residue fraction and an optically active epoxy alcohol distillate fraction; and distilling the optically active epoxy alcohol distillate fraction to purify the optically active epoxy alcohol.
    Type: Application
    Filed: June 9, 2005
    Publication date: June 25, 2009
    Applicant: SMITHKLINE BEECHAM CORPORATION
    Inventors: Ann Marie Elderidge, Christopher Werner