Purification Or Recovery Patents (Class 558/146)
  • Patent number: 10774098
    Abstract: Provided is a method for separating the four optical isomers of Nahlsgen.
    Type: Grant
    Filed: September 12, 2017
    Date of Patent: September 15, 2020
    Assignees: KYOTO UNIVERSITY, NAHLS CORPORATION CO., LTD.
    Inventors: Jun Hiratake, Bunta Watanabe, Ryuzo Yoshioka, Hideaki Ishida
  • Patent number: 9925229
    Abstract: An anti-aging composition, having anti-oxidant and anti-inflammatory properties, comprised of an effective amount of Turmeric Root Extract, Olive Leaf Extract, Grape Seed Extract, and Rosemary Leaf Extract to regulate and slow the signs of skin aging and tired looking skin. The composition also includes characteristics that may help to prevent cancer. The composition implements liposomal technology, using phosphatidylcholine, to surround the active ingredients with lipid molecules, thereby increasing the bioavailability of the present composition.
    Type: Grant
    Filed: October 15, 2015
    Date of Patent: March 27, 2018
    Inventors: Tejas Choksi, Ludwig Johnson
  • Patent number: 9663444
    Abstract: Activated fatty acids, pharmaceutical compositions including activated fatty acids, methods for using activated fatty acids to treat a variety of diseases, and methods for preparing activated fatty acids are provided herein.
    Type: Grant
    Filed: March 11, 2014
    Date of Patent: May 30, 2017
    Assignee: Complexa, Inc.
    Inventor: Raymond A. Miller
  • Patent number: 9024054
    Abstract: A process for producing a purified O-(2,6-dichloro-4-methylphenyl)-O,O-dimethyl phosphorothioate, the process comprising: the first step of bringing a crude O-(2,6-dichloro-4-methylphenyl)-O,O-dimethyl phosphorothioate into contact with an acid; and the second step of recovering the purified O-(2,6-dichloro-4-methylphenyl)-O,O-dimethyl phosphorothioate from the mixture obtained in the first step.
    Type: Grant
    Filed: December 18, 2009
    Date of Patent: May 5, 2015
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Eiji Yamauchi, Ryuhei Wakita
  • Patent number: 8981141
    Abstract: The present invention relates to I- and II-type crystals of L-?-glyceryl phosphoryl choline, and to a method for preparing same. More particularly, the present invention relates to noble I- and II-type anhydride crystals of L-?-glyceryl phosphoryl choline, which have a higher purity than conventional liquid L-?-glyceryl phosphoryl choline, and one advantage of which is that formulations and dosages of pharmaceuticals are easily modified, and another advantage of which is that the hygroscopicity of the crystals are much lower than that of conventional polymorphic crystals, providing excellent stability during storage. The present invention also relates to a method for preparing the I- and II-type crystals of L-?-glyceryl phosphoryl choline. The I-type crystal of L-?-glyceryl phosphoryl choline is characterized by having an onset temperature of 147° C. and an absorption peak of 150° C.
    Type: Grant
    Filed: July 9, 2014
    Date of Patent: March 17, 2015
    Assignee: Hanseochem Co., Ltd.
    Inventors: Min-Keun Oh, Ki-Nam Kim, Ki-Hyeong Seo, Dae-Gil Kwon
  • Publication number: 20150065741
    Abstract: The present invention relates to I- and II-type crystals of L-?-glyceryl phosphoryl choline, and to a method for preparing same. More particularly, the present invention relates to noble I- and II-type anhydride crystals of L-?-glyceryl phosphoryl choline, which have a higher purity than conventional liquid L-?-glyceryl phosphoryl choline, and one advantage of which is that formulations and dosages of pharmaceuticals are easily modified, and another advantage of which is that the hygroscopicity of the crystals are much lower than that of conventional polymorphic crystals, providing excellent stability during storage. The present invention also relates to a method for preparing the I- and II-type crystals of L-?-glyceryl phosphoryl choline. The I-type crystal of L-?-glyceryl phosphoryl choline is characterized by having an onset temperature of 147° C. and an absorption peak of 150° C.
    Type: Application
    Filed: July 9, 2014
    Publication date: March 5, 2015
    Inventors: Min-Keun OH, Ki-Nam KIM, Ki-Hyeong SEO, Dae-Gil KWON
  • Patent number: 8927755
    Abstract: The present invention relates to I- and II-type crystals of L-?-glyceryl phosphoryl choline, and to a method for preparing same. More particularly, the present invention relates to noble I- and II-type anhydride crystals of L-?-glyceryl phosphoryl choline, which have a higher purity than conventional liquid L-?-glyceryl phosphoryl choline, and one advantage of which is that formulations and dosages of pharmaceuticals are easily modified, and another advantage of which is that the hygroscopicity of the crystals are much lower than that of conventional polymorphic crystals, providing excellent stability during storage. The present invention also relates to a method for preparing the I- and II-type crystals of L-?-glyceryl phosphoryl choline.
    Type: Grant
    Filed: February 22, 2012
    Date of Patent: January 6, 2015
    Assignee: Hanseochem Co., Ltd.
    Inventors: Min-Keun Oh, Ki-Nam Kim, Ki-Hyeong Seo, Dae-Gil Kwon
  • Patent number: 8835665
    Abstract: Methods for recovery of recyclable water and/or fermentation co-products from thin stillage process streams. Microbial metabolites plant derivatives and/or plant extractives are removed from thin stillage after which water is recovered and recycled. Thin stillage is commingled with polar organic solvents or with oil to react microbial metabolites, plant derivatives and/or plant extractives. The reacted organic solvents are then separated from the processed thin stillage. Thin stillage may be commingled with an oil to re act with certain organic compounds, after which, the reacted oil is separated from the processed thin stillage is further extracted with one or more polar organic solvents. Alternatively, thin stillage may be first processed with one or more polar organic solvents, and then processed with an oil. Useful organic compounds may be recovered from the reacted oil and reacted organic solvents.
    Type: Grant
    Filed: June 2, 2009
    Date of Patent: September 16, 2014
    Assignee: University of Saskatchewan
    Inventors: Martin J. Reaney, Yunhua Jia, Jianheng Shen, Komsulee Ratanapariyanuch
  • Publication number: 20130345464
    Abstract: The present invention relates to I- and II-type crystals of L-?-glyceryl phosphoryl choline, and to a method for preparing same. More particularly, the present invention relates to noble I- and II-type anhydride crystals of L-?-glyceryl phosphoryl choline, which have a higher purity than conventional liquid L-?-glyceryl phosphoryl choline, and one advantage of which is that formulations and dosages of pharmaceuticals are easily modified, and another advantage of which is that the hygroscopicity of the crystals are much lower than that of conventional polymorphic crystals, providing excellent stability during storage. The present invention also relates to a method for preparing the I- and II-type crystals of L-?-glyceryl phosphoryl choline.
    Type: Application
    Filed: February 22, 2012
    Publication date: December 26, 2013
    Applicant: Hanseochem co., ltd
    Inventors: Min-Keun Oh, Ki-Nam Kim, Ki-Hyeong Seo, Dae-Gil Kwon
  • Patent number: 8404884
    Abstract: A process for the extraction of macromolecules from a biomass material comprising: a) contacting the biomass material with a solution comprising thin stillage to provide a slurry comprising undissolved solids, dissolved solids and suspended solids; and b) separating undissolved solids from the slurry to provide a solid fraction and a liquid fraction; and wherein the macromolecules are comprised in the dissolved solids.
    Type: Grant
    Filed: March 28, 2011
    Date of Patent: March 26, 2013
    Assignee: University of Saskatchewan
    Inventors: Martin J. Reaney, Kornsulee Ratanapariyanuch
  • Patent number: 8278375
    Abstract: Mixtures of three types of linear, branched or cyclic phosphates are useful flame retardants, especially for thermoplastic resins or as functional additives in polymer matrices.
    Type: Grant
    Filed: July 5, 2006
    Date of Patent: October 2, 2012
    Assignee: Rhodia UK Limited
    Inventors: Vincent Schanen, Dwight Shamblee, Gleb Priimov, Julie Ann Salter
  • Patent number: 8178711
    Abstract: One or more triorganophosphite components are separated from a crude phosphite mixture containing acidic hydrolysis products. The crude phosphite mixture is contacted with a basic additive to produce a second mixture comprising a first phase and a second phase. The first phase comprises the basic additive and one or more acidic hydrolysis products and the second phase comprises one or more triorganophosphite components.
    Type: Grant
    Filed: October 29, 2009
    Date of Patent: May 15, 2012
    Assignee: Invista North America S.A R.L.
    Inventor: Joachim C. Ritter
  • Publication number: 20120116074
    Abstract: The present invention is directed to processes associated with the preparation of [2-(8,9-dioxo-2,6-diazabicyclo[5.2.0]non-1(7)-en-2-yl)ethyl]phosphonic acid (perzinfotel).
    Type: Application
    Filed: March 19, 2010
    Publication date: May 10, 2012
    Inventors: Thomas Gerard Cullen, Giuseppe Angelo Miralia, Stefania Sapienza, Machael Joseph O'neill, Jignesh Patel, Rosa Norato, Luisa Borrello
  • Publication number: 20120052481
    Abstract: Provided are methods and compositions which are useful for separating, isolating, detecting, and quantifying compounds of interest which have been modified chemically, enzymatically or catalytically from other compounds which have not been so modified. The modifications may take the form of functional groups which are gained, lost or retained by the compounds of interest.
    Type: Application
    Filed: August 24, 2010
    Publication date: March 1, 2012
    Applicant: ENZO LIFE SCIENCES, INC., C/O ENZO BIOCHEM, INC.
    Inventors: Elazar Rabbani, Joshua Rabbani, Praveen Pande, Jannis G. Stavrianopoulos
  • Patent number: 8039658
    Abstract: A method of removing trace levels of arsenic-containing impurities from raw triethylphosphate (TEPO) is disclosed. The method uses adsorption, or adsorption followed by a flash distillation. The method comprises contacting raw triethylphosphate (TEPO) with an adsorbent which selectively adsorbs the arsenic-containing impurities in the raw triethylphosphate (TEPO). The adsorbent is a base promoted alumina containing adsorbent represented by a formula: ZxWy; where x is the weight percentage of Z in the adsorbent ranging from 30% to 99.999%; y is the weight percentage of W in the adsorbent, and x+y=100%; Z is selected from the group consisting of alumina (Al2O3), magnesium-alumina based layered double hydroxide (MgO—Al2O3), alumina-zeolite, and mixtures thereof; and W is selected from the group consisting of at least one basic metal oxide, at least one basic metal carbonate, and mixtures thereof.
    Type: Grant
    Filed: July 25, 2008
    Date of Patent: October 18, 2011
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Steven Gerard Mayorga, Heather Regina Bowen, Kelly Ann Chandler
  • Publication number: 20110237818
    Abstract: A process for producing a purified O—(2,6-dichloro-4-methylphenyl)—O,O-dimethyl phosphorothioate, the process comprising: the first step of bringing a crude O—(2,6-dichloro-4-methylphenyl)—O,O-dimethyl phosphorothioate into contact with an acid; and the second step of recovering the purified O—(2,6-dichloro-4-methylphenyl)—O,O-dimethyl phosphorothioate from the mixture obtained in the first step.
    Type: Application
    Filed: December 18, 2009
    Publication date: September 29, 2011
    Applicant: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Eiji Yamauchi, Ryuhei Wakita
  • Publication number: 20110130586
    Abstract: Methods for recovery of recyclable water and/or fermentation co-products from thin stillage process streams. Microbial metabolites and/or plant derivatives and/or plant extractives are removed from thin stillage after which, recyclable water is recovered from the processed thin stillage. Thin stillage is commingled with one or more polar organic solvents to react microbial metabolites and/or plant derivatives and/or plant extractives with the organic solvents. The reacted organic solvents are then separated from the processed thin stillage. Thin stillage may be commingled with an oil to re act with certain organic compounds, after which, the reacted oil is separated from the processed thin stillage is further extracted with one or more polar organic solvents. Alternatively, thin stillage may be first processed with one or more polar organic solvents, and then processed with an oil. Useful organic compounds may recovered from the reacted oil and from the reacted organic solvents.
    Type: Application
    Filed: June 2, 2009
    Publication date: June 2, 2011
    Applicant: UNIVERSITY OF SASKATCHEWAN
    Inventors: Martin J. Reaney, Yunhua Jia, Jianheng Shen, Komsulee Ratanaparlyanuch
  • Publication number: 20110124606
    Abstract: Disclosed are: a sense-improving agent which comprises, as an active ingredient, a phospholipid or a sphingosine-containing phospholipid and/or a derivative thereof, particularly a sphingomyelin, and which has an effect of improving the dulling of senses at a periphery when ingested orally or directly applied to the skin; and a sense-improving food, beverage, feed or cosmetic comprising the sense-improving agent. The phospholipid to be used may be a chemically synthesized phospholipid or a naturally occurring phospholipid, preferably a phospholipid derived from an edible material such as soybean and egg yolk, particularly preferably a phospholipid derived from milk.
    Type: Application
    Filed: November 19, 2008
    Publication date: May 26, 2011
    Applicant: SNOW BRAND MILK PRODUCTS CO., LTD.
    Inventors: Tatsuya Watanabe, Yuko Haruta, Ken Kato, Toshimitsu Yoshioka
  • Patent number: 7947632
    Abstract: Phosphate esters useful for gelling hydrocarbons in combination with a metal source are disclosed along with methods of preparation of the phosphate esters. Fouling in oil refinery towers has been attributed due to distillation of impurities present in phosphate esters used to gel hydrocarbons for oil well fracturing. The improved method of preparation of the phosphate ester results in a product that substantially reduces or eliminates volatile phosphorus, which is phosphorus impurities that distill up to 250° C., and increases the high temperature viscosity of the hydrocarbon gels formed using the phosphate esters.
    Type: Grant
    Filed: November 5, 2010
    Date of Patent: May 24, 2011
    Assignee: Brine-Add Fluids Ltd.
    Inventors: David P. Horton, Ioan Ghesner
  • Patent number: 7884226
    Abstract: Provided are processes for the purification of a pure rosuvastatin intermediate by thin film evaporation and chemical method, and conversion of the intermediate to rosuvastatin or salts thereof.
    Type: Grant
    Filed: July 14, 2008
    Date of Patent: February 8, 2011
    Assignee: Teva Pharmaceutical Industries, Ltd.
    Inventors: Tamar Nidam, Omer Malachi, Irena Veinberg, Valerie Niddam-Hildesheim, Vinod Kumar Kansal, Harish Ranjan, Appu Ekambaram Ponnuswamy, Sunil Rokad, Surat Kiran, Debashish Das
  • Patent number: 7629333
    Abstract: The present invention relates to a sterile, stable dosage forms suitable for reconstitution and parenteral administration to a patient, said dosage form comprising an amorphous aminoalkyl dihydrogen phosphorothioate, and of amifostine in particular. The invention further relates to a method of preparing such a dosage form, which typically exhibits enhanced thermal stability as compared to existing vacuum dried amorphous amifostine.
    Type: Grant
    Filed: December 21, 2004
    Date of Patent: December 8, 2009
    Assignee: MedImmune, LLC
    Inventors: Martin Stogniew, Javad M. Zadei
  • Patent number: 7629484
    Abstract: One or more triorganophosphite components are separated from a crude phosphite mixture containing acidic hydrolysis products. The crude phosphite mixture is contacted with a basic additive to produce a second mixture comprising a first phase and a second phase. The first phase comprises the basic additive and acidic hydrolysis products. The second phase comprises one or more triorganophosphite components.
    Type: Grant
    Filed: March 9, 2007
    Date of Patent: December 8, 2009
    Assignee: Invista North America S.A.R.L.
    Inventor: Joachim C. Ritter
  • Patent number: 7566570
    Abstract: Methods are disclosed for extracting and separating polar lipids, including phospholipids, from materials containing oil, polar lipid, protein, ash, and/or carbohydrate, such as egg yolks and other phospholipid-containing materials. In particular, methods for extracting phospholipids from phospholipid-containing materials through the use of an aliphatic alcohol and control of temperature are disclosed. Using these methods, phospholipids in the aqueous liquid fraction will be efficiently separated and will precipitate readily, and can be subjected to separation for improved purity.
    Type: Grant
    Filed: January 26, 2005
    Date of Patent: July 28, 2009
    Assignee: Martek Biosciences Corporation
    Inventor: Jesus Ruben Abril
  • Publication number: 20090099383
    Abstract: Provided are processes for the purification of a pure rosuvastatin intermediate by thin film evaporation and chemical method, and conversion of the intermediate to rosuvastatin or salts thereof.
    Type: Application
    Filed: July 14, 2008
    Publication date: April 16, 2009
    Inventors: Tamar Nidam, Omer Malachi, Irena Veinberg, Valerie Niddam-Hildesheim, Vinod Kumar Kansal, Harish Ranjan, Appu Ekambaram Ponnuswamy, Sunil Rokad, Surat Kiran, Debashish Das
  • Publication number: 20080275265
    Abstract: The present invention relates to processes for the preparation of (?-aminoalkylamino)alkyl halides, their conversion to S-?-(?-aminoalkylamino)alkyl phosphothioates, and purification of the crystalline products of the reaction. The preparation process for the (?-aminoalkylamino)alkyl halides comprises contacting an appropriate alcohol with a brominating agent in the presence of a sulfone solvent under temperature and pressure conditions suitable to effect salt formation without subsequent premature precipitation. The process is especially useful for converting (?-aminoalkylamino)ethyl alcohol to amifostine.
    Type: Application
    Filed: November 1, 2006
    Publication date: November 6, 2008
    Applicant: ALBEMARLE CORPORATION
    Inventor: Edward G. Samsel
  • Patent number: 7438818
    Abstract: The invention relates to a process for immobilizing acidic or electrophilic compounds in a solution. The process is characterized in that it consists in bringing a crosslinked polyimine, which is insoluble in the medium and in which the imino groups are —NH-groups, into contact with said compounds and in then separating, by filtration, the modified polyimine obtained. The crosslinked polyimine comprises linear segments composed of —HN—R1—NH—R2—Ar—R3-units in which R1, R2 and R3 are identical or different alkylene or alkenylene groups and Ar represents an aromatic group. The process is of use for fixing undesirable compounds or for purifying acidic compounds.
    Type: Grant
    Filed: April 29, 2004
    Date of Patent: October 21, 2008
    Assignees: Centre National de la Recherche Scientifique, Universite de Montpellier I, Universite de Montpellier II
    Inventor: Didier Stien
  • Publication number: 20070219386
    Abstract: The invention provides a method for separating one or more triorganophosphite components from a crude phosphite mixture containing acidic hydrolysis products, the method comprising: contacting said crude phosphite mixture with a basic additive to produce a second mixture comprising a first phase and a second phase, wherein said first phase comprises the basic additive and one or more components independently selected from the group consisting of (R2O)(R3O)POH, (R1O)(HO)PO(H) and H3PO3, wherein R1, R2 and R3 are independently selected from the group consisting of C1 to C18 alkyl, C6 to C18 aryl and hydroxyaryl, and C3 to C18 cycloalkyl and hydroxyalkyl radicals, and wherein R2 and R3 can optionally be connected to each other directly by a chemical bond or through an intermediate divalent group R9; and said second phase comprises one or more triorganophosphite components independently selected from the group consisting of (R4O)(R5O)P(OR6) and ((R7O)(R8O)PO)nA, wherein R4, R5, R6, R7 and R8 are independently sel
    Type: Application
    Filed: March 9, 2007
    Publication date: September 20, 2007
    Applicant: INVISTA NORTH AMERICA S.A R.L.
    Inventor: Joachim C. Ritter
  • Patent number: 7166736
    Abstract: Neopentyl glycol bis(diphenyl phosphate) liquid compositions are described that comprise from about 75% to about 90%, by weight, of neopentyl glycol bis(diphenyl phosphate), less than about 5% by weight of cyclic product, less than about 8% by weight of triphenyl phosphate, and with a P3 content of no less than about 1%, by weight. These compositions are made by continuously adding neopentyl glycol to a diaryl chlorophosphate mixture at elevated temperature, under vacuum, and in the presence of a catalyst.
    Type: Grant
    Filed: May 6, 2003
    Date of Patent: January 23, 2007
    Assignee: Supresta LLC
    Inventors: Danielle Angrand Bright, Ronald L. Pirrelli, Anantha Narayanan Desikan
  • Patent number: 7037431
    Abstract: Acids can be removed from aprotic organic liquids by bringing the liquids into contact with polyalkyleneimines that have been applied to a support. Polyethyleneimine that has been applied to amorphous silicon dioxide is particularly suitable for this method. The method can be used, for example, to eliminate acidic components from fluorinated esters.
    Type: Grant
    Filed: March 3, 2004
    Date of Patent: May 2, 2006
    Assignee: Solvay Fluor und Derivate GmbH
    Inventors: Olaf Boese, Katja Peterkord
  • Patent number: 6841545
    Abstract: The present invention relates to a sterile, stable dosage forms suitable for reconstitution and parenteral administration to a patient, said dosage form comprising an amorphous aminoalkyl dihydrogen phosphorothioate, and of amifostine in particular. The invention further relates to a method of preparing such a dosage form, which typically exhibits enhanced thermal stability as compared to existing vacuum dried amorphous amifostine.
    Type: Grant
    Filed: March 29, 2002
    Date of Patent: January 11, 2005
    Assignee: MedImmune Oncology, Inc.
    Inventors: Martin Stogniew, Javad M. Zadei
  • Publication number: 20040232081
    Abstract: Acids can be removed from aprotic organic liquids by bringing the liquids into contact with polyalkyleneimines that have been applied to a support. Polyethyleneimine that has been applied to amorphous silicon dioxide is particularly suitable for this method. The method can be used, for example, to eliminate acidic components from fluorinated esters.
    Type: Application
    Filed: March 3, 2004
    Publication date: November 25, 2004
    Applicant: Solvay Fluor und Derivate GmbH
    Inventors: Olaf Boese, Katja Peterkord
  • Publication number: 20040167348
    Abstract: The invention relates to a method of purifying an O,O-dialkyl S-[2-(alkylthio)alkyl] phosphorodithioate by purging a sample containing a volatile and the O,O-dialkyl S-[2-(alkylthio)alkyl] phosphorodithioate with a gas.
    Type: Application
    Filed: February 26, 2003
    Publication date: August 26, 2004
    Inventors: Vidyanatha A. Prasad, Robert D. Ingalls, Stephen C. Slahck, Christopher M. Tusa, Paul E. Nagy, Michael P. Newcomer, Donald K. Smith
  • Publication number: 20040116728
    Abstract: A crude phosphate ester product can be purified by first washing it with chelating agent composition (such as a dilute acidic solution) and then, preferably, water, drying the resulting product, and then treating the resulting product with an acid scavenger, as exemplified by an epoxy-containing compound, such as 3,4-epoxy cyclohexyl methyl-3,4-epoxy cyclohexyl carboxylate.
    Type: Application
    Filed: January 16, 2004
    Publication date: June 17, 2004
    Inventors: Danielle A. Bright, Eric W. Burkhardt, Antoon ten Kate, Sophia Dashevsky, John Tomko
  • Patent number: 6734325
    Abstract: A process for the separation and recycling of catalyst components from a chemical reaction mixture is disclosed. The process entails at least one extraction step.
    Type: Grant
    Filed: December 16, 2002
    Date of Patent: May 11, 2004
    Assignee: Bayer Aktiengesellschaft
    Inventors: Claus-Peter Reisinger, Sven Michael Hansen, Peter Fischer, Michael Traving
  • Patent number: 6717005
    Abstract: A polyphosphate ester composition consisting essentially of an effective amount of a cycloaliphatic epoxy composition for reduction of the total acid number of the composition. The phosphate ester is of the formula: where R can be aryl or alkaryl, R′ can be arylene, arylene-alkylene-arylene, or alkylene, and n ranges from about 1 to about 5.
    Type: Grant
    Filed: May 13, 2002
    Date of Patent: April 6, 2004
    Assignee: Akzo Nobel N.V.
    Inventors: Eric W. Burkhardt, Danielle A. Bright, Sergei Levchik, Sophia Dashevsky, Mark Buczek
  • Patent number: 6706907
    Abstract: A method of purifying an organic phosphoric ester characterized by treating a crude organic phosphoric ester with an epoxy compound and treating the treated organic phosphoric ester with an alkaline aqueous solution to purify it. The purification method is effective in stably obtaining an organic phosphoric ester reduced in acid value and excellent in heat resistance, hydrolytic resistance, and storage stability, regardless of the kind or amount of the organic phosphoric ester, the treating conditions, etc.
    Type: Grant
    Filed: January 24, 2002
    Date of Patent: March 16, 2004
    Assignee: Daihachi Chemical Industry Co. Ltd.
    Inventors: Kiyoharu Hirao, Masasuke Oda
  • Publication number: 20030166959
    Abstract: A process for the separation and recycling of catalyst components from a chemical reaction mixture is disclosed. The process entails at least one extraction step.
    Type: Application
    Filed: December 16, 2002
    Publication date: September 4, 2003
    Inventors: Claus-Peter Reisinger, Sven Michael Hansen, Peter Fischer, Michael Traving
  • Publication number: 20030153779
    Abstract: A process for the removal and recovery of quaternary salt (A) and base (D) from a reaction mixture is disclosed. The reaction mixture resulting from oxidative direct carbonylation contains in addition to (A) and (D), at least one hydroxyaromatic compound (B) and at least one reaction product (C) and optionally a solvent, and the process entails a) adding acid to the reaction mixture to cause conversion of (D) into a hydroxyaromatic compound (B2) b) separating the reaction mixture into b1.) that contains (C) and optionally (B) and/or (B2) and b2.) that contains (A) and optionally (B) and/or (B2), and c) reacting b1.) with a base (E) to re-form (D).
    Type: Application
    Filed: December 16, 2002
    Publication date: August 14, 2003
    Inventors: Peter Fischer, Sven Michael Hansen, Claus-Peter Reisinger
  • Patent number: 6407278
    Abstract: The present invention relates to a sterile, stable dosage forms suitable for reconstitution and parenteral administration to a patient, said dosage form comprising an amorphous aminoalkyl dihydrogen phosphorothioate, and of amifostine in particular. The invention further relates to a method of preparing such a dosage form, which typically exhibits enhanced thermal stability as compared to existing vacuum dried amorphous amifostine.
    Type: Grant
    Filed: November 16, 1998
    Date of Patent: June 18, 2002
    Assignee: MedImmune Oncology, Inc.
    Inventors: Martin Stogniew, Javad M. Zadei
  • Patent number: 6384259
    Abstract: The present invention relates to a sterile, stable dosage forms suitable for reconstitution and parenteral administration to a patient, said dosage form comprising an amorphous aminoalkyl dihydrogen phosphorothioate, and of amifostine in particular. The invention further relates to a method of preparing such a dosage form, which typically exhibits enhanced thermal stability as compared to existing vacuum dried amorphous amifostine.
    Type: Grant
    Filed: November 16, 1999
    Date of Patent: May 7, 2002
    Assignee: MedImmune Oncology, Inc.
    Inventors: Martin Stogniew, Javad M. Zadei
  • Patent number: 6362358
    Abstract: A novel process is described for preparing phosphonites or phosphinites by reacting a product of a Friedel-Crafts reaction with alcohols or phenols and separating off the byproducts formed. The novelty is the aftertreatment with a protic compound, or with an oxide, hydroxide, (hydrogen)carbonate resp. (hydrogen)phosphate of a metal or with a nitrogen containing compound (as defined in claim 1), or with any combination of one or more substances of the above mentioned compound classes. Products having a low halide and aluminum content are obtained which are distinguished by an improved clear solubility and an improved action as stabilizer for polymeric materials.
    Type: Grant
    Filed: March 10, 2000
    Date of Patent: March 26, 2002
    Assignee: Clariant Finance (BVI) Limited
    Inventors: Ernst Gronmaier, Peter Staniek
  • Publication number: 20020019521
    Abstract: The geometric isomers of olefins and olefinic compounds are separated by means of liquid chromatography using a stationary phase comprising an organosilane with a pendant aliphatic functional group such as C18 and a mobile phase which includes an additive comprising alkanes and alkenes.
    Type: Application
    Filed: March 1, 2001
    Publication date: February 14, 2002
    Inventors: John Duncan Orr, Lily Lu
  • Publication number: 20020010357
    Abstract: The present invention relates to a sterile, stable dosage forms suitable for reconstitution and parenteral administration to a patient, said dosage form comprising an amorphous aminoalkyl dihydrogen phosphorothioate, and of amifostine in particular. The invention further relates to a method of preparing such a dosage form, which typically exhibits enhanced thermal stability as compared to existing vacuum dried amorphous amifostine.
    Type: Application
    Filed: November 16, 1998
    Publication date: January 24, 2002
    Inventors: MARTIN STOGNIEW, JAVAD ZADEI
  • Patent number: 6218377
    Abstract: The present invention provides methods of administering aminoalkyl phosphorothioate and/or aminoalkyl thiol compounds to patients in a manner that significantly reduces or decreases the adverse or undesirable side-effects of the compounds as compared with conventional intravenous administration.
    Type: Grant
    Filed: June 5, 2000
    Date of Patent: April 17, 2001
    Assignee: MedImmune Oncology Inc.
    Inventors: Martin Stogniew, Philip S. Schein
  • Patent number: 6127351
    Abstract: The present invention provides methods of administering aminoalkyl phosphorothioate and/or aminoalkyl thiol compounds to patients in a manner that significantly reduces or decreases the adverse or undesirable side-effects of the compounds as compared with conventional intravenous administration.
    Type: Grant
    Filed: February 10, 1998
    Date of Patent: October 3, 2000
    Assignee: MedImmune Oncology Inc.
    Inventors: Martin Stogniew, Philip S. Schein
  • Patent number: 6075157
    Abstract: The present invention provides a method for making O,S-dimethyl phosphoramidothioate. In accordance with this process, O,O-dimethyl phosphoramidothioate is isomerized in the presence of dimethyl sulfate to form a reaction mixture; the reaction mixture is then passed through a wiped film evaporator at a temperature of from about 55.degree. C. to about 120.degree. C. and a pressure of from about 3 to about 10 mm Hg, with the distillate containing O,S-dimethyl phosphoramidothioate, unreacted O,O-dimethyl phosphoramidothioate and by-products, and the residue containing O,S-dimethyl phosphoramidothioate in an amount greater than the amount of O,S-dimethyl phosphoramidothioate contained in the reaction mixture prior to distillation.
    Type: Grant
    Filed: August 17, 1998
    Date of Patent: June 13, 2000
    Assignee: Bayer Corporation
    Inventors: Vidyanatha A. Prasad, Klaus Jelich
  • Patent number: 6028209
    Abstract: A process for the preparation of C.sub.14 -C.sub.18 -alkylphosphocholines by reacting an n-alkanol with a chain length of C.sub.14 -C.sub.18 with phosphorus oxychloride in an inert solvent or also without solvent in the presence or absence of a basic substance in a single vessel process and subsequent reaction of the reaction product in an inert solvent with a choline salt in the presence of a basic substance to form phosphoric acid diester chloride, subsequent hydrolysis and isolation of alkylphosphocholine as well as optionally purification using a mixed-bed ion exchanger or in successive steps with an acid ion exchanger and a basic ion exchanger.
    Type: Grant
    Filed: April 22, 1999
    Date of Patent: February 22, 2000
    Assignee: Asta Medica AG
    Inventors: Jurgen Engel, Bernd Kutscher, Wolfgang Schumacher, Ulf Niemeyer, Alfred Olbrich, Gerhard Nossner
  • Patent number: 5942639
    Abstract: A process for the preparation of C.sub.14 -C.sub.18 -alkylphosphocholines by reacting an n-alkanol with a chain length of C.sub.14 -C.sub.18 with phosphorus oxychloride in an inert solvent or also without solvent in the presence or absence of a basic substance in a single vessel process and subsequent reaction of the reaction product in an inert solvent with a choline salt in the presence of a basic substance to form phosphoric acid diester chloride, subsequent hydrolysis and isolation of alkylphosphocholine as well as optionally purification using a mixed-bed ion exchanger or in successive steps with an acid ion exchanger and a basic ion exchanger.
    Type: Grant
    Filed: September 25, 1997
    Date of Patent: August 24, 1999
    Assignee: Asta Medica Aktiengesellschaft
    Inventors: Jurgen Engel, Bernd Kutscher, Wolfgang Schumacher, Ulf Niemeyer, Alfred Olbrich, Gerhard Nssner
  • Patent number: 5831112
    Abstract: The invention is directed to a process for producing a stable, low odor S,S,S-tributylphosphorotrithioate having a level of dibutyl disulfide of 0.3% by weight or less. The process broadly includes the steps ofa) reacting S,S,S-tributylphosphorotrithioite with an oxidizing agent to produce a crude S,S,S-tributylphosphorotrithioate,b) treating the crude product with sodium bisulfite to decompose any excess oxidizing agent,c) adding a caustic solution having a caustic concentration of from 25 to 50% by weight directly to the reaction mixture of step b), the addition of said caustic solution being stopped once the total caustic concentration is less than 10% by weight and once the pH is constant, andd) phase separating S,S,S-tributylphosphorotrithioate from the mixture of step c).
    Type: Grant
    Filed: June 20, 1997
    Date of Patent: November 3, 1998
    Assignee: Bayer Corporation
    Inventors: Vidyanatha A. Prasad, Peter E. Newallis
  • Patent number: 5684174
    Abstract: A method for purifying O,S-dimethyl N-acetyphosphoramidothioate, which is characterized by subjecting a crude crystal of O,S-dimethyl N-acetylphosphoramidothioate to recrystallization by using a two-phase solvent system comprising water and an organic which is an aromatic hydrocarbon, an aliphatic carboxylic acid ester or aliphatic ketone, wherein the amount of water is 0.1 to 2 parts by weight and the amount of the organic solvent is 1 to 20 parts by weight to 1 part by weight of the crude O,S-dimethyl N-acetylphosphoramidothioate.
    Type: Grant
    Filed: September 26, 1996
    Date of Patent: November 4, 1997
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Yoji Sakito, Mamoru Shirahata, Yujiro Kiyoshima, Kazuya Minamisaka, Atukazu Iwata