Patents by Inventor Alfred Oftring

Alfred Oftring has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 9802884
    Abstract: Mixture of L- and D-enantiomers of methyl glycine diacetic acid (MGDA) or its respective mono-, di or trialkali metal or mono-, di- or triammonium salts, said mixture containing predominantly the respective L-isomer with an enantiomeric excess (ee) in the range of from 10 to 75%.
    Type: Grant
    Filed: September 5, 2014
    Date of Patent: October 31, 2017
    Assignee: BASF SE
    Inventors: Marta Reinoso Garcia, Markus Hartmann, Kati Schmidt, Matthias Rauls, Thomas Schmidt, Paul Klingelhoefer, Alfred Oftring, Somnath Shivaji Kadam
  • Patent number: 9695121
    Abstract: The present invention relates to 2,6-bis(aminomethyl)piperidine derivatives as such (in the following text abbreviated to “2,6-BAMP derivatives”) which are defined by the general formula (I) shown in the following text. In addition, the present invention relates to a process for preparing such 2,6-BAMP derivatives by hydrogenation of the corresponding 2,6-dicyanopiperidine derivatives (hereinafter abbreviated to “2,6-DCP derivatives”) in the presence of a catalyst. The present invention further provides for the use of the 2,6-BAMP derivatives of the invention as hardeners for epoxy resins, as intermediate in the preparation of diisocyanates, which play an important role in the production of polyurethanes, as starters in the preparation of polyetherols and/or as monomers for polyamide production. The present invention further relates to the diisocyanates as such prepared from the 2,6-BAMP derivatives and also the corresponding preparative process.
    Type: Grant
    Filed: January 27, 2014
    Date of Patent: July 4, 2017
    Assignee: BASF SE
    Inventors: Stephanie Jaegli, Thomas Schmidt, Alfred Oftring, Alexander Panchenko, Kirsten Dahmen, Oliver Molt
  • Patent number: 9512061
    Abstract: Process for the preparation of racemic ?-amino acids or of glycine, wherein the corresponding ?-hydroxycarboxylic acid, selected from hydroxyacetic acid, lactic acid, malic acid, ?-hydroxyglutamic acid, isocitric acid, tartronic acid and tartaric acid, or at least one salt of the corresponding ?-hydroxycarboxylic acid is reacted in the presence of at least one heterogeneous catalyst which comprises at least one transition metal, in the presence of hydrogen with at least one nitrogen compound (c), where the nitrogen compound (c) is selected from primary and secondary amines and ammonia.
    Type: Grant
    Filed: December 19, 2012
    Date of Patent: December 6, 2016
    Assignee: BASF SE
    Inventors: Roland Bou Chedid, Alfred Oftring, Wolfgang Staffel, Markus Christian Biel, Johann-Peter Melder, Christian Gruenanger
  • Publication number: 20160221931
    Abstract: Mixture of L- and D-enantiomers of methyl glycine diacetic acid (MGDA) or its respective mono-, di or trialkali metal or mono-, di- or triammonium salts, said mixture containing predominantly the respective L-isomer with an enantiomeric excess (ee) in the range of from 10 to 75%.
    Type: Application
    Filed: September 5, 2014
    Publication date: August 4, 2016
    Applicant: BASF SE
    Inventors: Marta REINOSO GARCIA, Markus HARTMANN, Kati SCHMIDT, Matthias RAULS, Thomas SCHMIDT, Paul KLINGELHOEFER, Alfred OFTRING, Somnath Shivaji KADAM
  • Patent number: 9227915
    Abstract: A process is proposed for the preparation of a crystalline L-MGDA trialkali metal salt by crystallization from an aqueous solution thereof which has been obtained by Strecker synthesis, starting from L-?-alanine, by reaction with formaldehyde and hydrocyanic acid to give L-?-alanine-N,N-diacetonitrile and subsequent alkaline saponification of the L-?-alanine-N,N-diacetonitrile to give the L-MGDA trialkali metal salt, wherein a temperature of 150° C. is not exceeded during the alkaline saponification.
    Type: Grant
    Filed: May 3, 2012
    Date of Patent: January 5, 2016
    Assignee: BASF SE
    Inventors: Alfred Oftring, Maxim Weber, Gerold Braun, Arnulf Lauterbach
  • Publication number: 20150353491
    Abstract: The present invention relates to 2,6-bis(aminomethyl)piperidine derivatives as such (in the following text abbreviated to “2,6-BAMP derivatives”) which are defined by the general formula (I) shown in the following text. In addition, the present invention relates to a process for preparing such 2,6-BAMP derivatives by hydrogenation of the corresponding 2,6-dicyanopiperidine derivatives (hereinafter abbreviated to “2,6-DCP derivatives”) in the presence of a catalyst. The present invention further provides for the use of the 2,6-BAMP derivatives of the invention as hardeners for epoxy resins, as intermediate in the preparation of diisocyanates, which play an important role in the production of polyurethanes, as starters in the preparation of polyetherols and/or as monomers for polyamide production. The present invention further relates to the diisocyanates as such prepared from the 2,6-BAMP derivatives and also the corresponding preparative process.
    Type: Application
    Filed: January 27, 2014
    Publication date: December 10, 2015
    Applicant: BASF SE
    Inventors: Stephanie JAEGLI, Thomas SCHMIDT, Alfred OFTRING, Alexander PANCHENKO, Kirsten DAHMEN, Oliver MOLT
  • Publication number: 20150353869
    Abstract: Detergent compositions comprising anionic surfactant and a carboxymethylated polyalkyleneimine, where the detergent compositions are substantially free of bleach. Methods of using such compositions, for example, to treat a surface.
    Type: Application
    Filed: June 5, 2015
    Publication date: December 10, 2015
    Inventors: Patrick Christopher STENGER, Gregory Scot MIRACLE, Steffen MAAS, Alfred OFTRING, Bjoern LUDOLPH
  • Patent number: 9062278
    Abstract: The present invention relates to a process for preparing ether carboxylates.
    Type: Grant
    Filed: February 18, 2011
    Date of Patent: June 23, 2015
    Assignee: BASF SE
    Inventors: Robert Baumann, Markus Christian Biel, Andreas Deckers, Alfred Oftring, Frank Rittig, Wolfgang Staffel
  • Patent number: 8802894
    Abstract: A process for preparing an aqueous solution of a methylglycine-N,N-diacetic acid trialkali metal salt at a high yield and purity by Strecker synthesis, the process including: reacting an aqueous solution containing ?-alanine with formaldehyde and hydrocyanic acid, to obtain ?-alanine-N,N-diacetonitrile in one reaction unit; and saponification of the ?-alanine-N,N-diacetonitrile with a base, to obtain the methylglycine-N,N-diacetic acid trialkali metal salt, wherein the ?-alanine is partially neutralized and the addition of formaldehyde and hydrocyanic acid are controlled such that a concentration of free hydrocyanic acid in the liquid reaction mixture at any time is limited such that secondary reactions that produce formaldehyde cyanohydrin, consecutive reactions of formaldehyde cyanohydrin, and the polymerization of hydrocyanic acid, only occur insofar as the specification requirements, such as nitrilotriacetic acid content and color, for methylglycine-N,N-diacetic acid trialkali metal salts are observed.
    Type: Grant
    Filed: March 27, 2012
    Date of Patent: August 12, 2014
    Assignee: BASF SE
    Inventors: Alfred Oftring, Gerold Braun, Arnulf Lauterbach
  • Patent number: 8785685
    Abstract: The present invention relates to a process for preparing aminopolycarboxylates proceeding from an amino acid which, in a first process step is reacted with ethylene oxide to give an intermediate mixture comprising the corresponding dialkanolamine, and then the intermediate mixture, in a second process step is converted catalytically using a base to the corresponding aminopolycarboxylate, wherein the amino acid, before the reaction with ethylene oxide in the first process step, is supplied to a partial neutralization with 0.70 to 0.99 equivalent of base per acid group, or, in the first process step, an amino acid which has already been partly neutralized with 0.70 to 0.99 equivalent of base per acid group is used.
    Type: Grant
    Filed: March 26, 2012
    Date of Patent: July 22, 2014
    Assignee: BASF SE
    Inventors: Robert Baumann, Markus Christian Biel, Axel Franzke, Thomas Heidenfelder, Paul Klingelhoefer, Alfred Oftring
  • Patent number: 8772527
    Abstract: The present invention relates to an improved process for batchwise or continuous isomerization of cis-2-pentenenitrile to 3-pentenenitriles in the presence of 1,4-diazabicyclo[2.2.2]octane as catalyst.
    Type: Grant
    Filed: April 22, 2013
    Date of Patent: July 8, 2014
    Assignee: BASF SE
    Inventors: Rolf-Hartmuth Fischer, Alfred Oftring, Robert Baumann, Hermann Luyken
  • Patent number: 8609894
    Abstract: A process for preparing aminopolycarboxylates proceeding from the corresponding polyalkanolamines by oxidative dehydrogenation in the presence of a catalyst comprising 1 to 90% by weight of copper, based on the total weight of the catalyst, using a base, which comprises first performing a partial conversion of the polyalkanolamine to a reaction mixture comprising the aminopolycarboxylate at a temperature in the range from 140 to 180° C. until at least 10 to 90 mol% of the polyalkanolamine has been depleted, and then continuing the conversion at elevated temperature.
    Type: Grant
    Filed: April 2, 2012
    Date of Patent: December 17, 2013
    Assignee: BASF SE
    Inventors: Robert Baumann, Markus Christian Biel, Axel Franzke, Alfred Oftring, Friedhelm Teich, Paul Klingelhoefer, Marie Katrin Schroeter
  • Patent number: 8586794
    Abstract: The present invention relates to 5-isopropyl-3-aminomethyl-2-methyl-1-aminocyclohexane (carvonediamine) and to a process for preparation thereof by a) reacting carvone with hydrogen cyanide, b) then reacting the carvonenitrile obtained in stage a) with ammonia in the presence of an imine formation catalyst and c) then reacting the carvonenitrile imine-containing reaction mixture obtained in stage b) with hydrogen and ammonia over hydrogenation catalysts. The present invention further relates to the use of carvonediamine as a hardener for epoxy resins, as an intermediate in the preparation of diisocyanates, as a starter in the preparation of polyetherols and/or as a monomer for polyamide preparation.
    Type: Grant
    Filed: July 13, 2009
    Date of Patent: November 19, 2013
    Assignee: BASF SE
    Inventors: Martin Ernst, Alfred Oftring, Kathrin Wissel-Stoll, Oemer Uensal, Stephan Freyer, Ansgar Gereon Altenhoff, Wolfgang Staffel
  • Patent number: 8586795
    Abstract: The invention relates to a process for preparing triethylenetetramine substituted by at least one methyl group (Me-TETA or methyl-substituted TETA compounds). Me-TETA is prepared by hydrogenating biscyanomethylimidazolidine (BCMI) in the presence of a catalyst. The present invention further relates to methyl-substituted TETA compounds as such. The present invention further relates to the use of methyl-substituted TETA compounds as a reactant or intermediate in the production of, for example, coatings or adhesives.
    Type: Grant
    Filed: June 14, 2010
    Date of Patent: November 19, 2013
    Assignee: BASF SE
    Inventors: Randolf Hugo, Johann-Peter Melder, Robert Baumann, Alfred Oftring, Boris Buschhaus, Gordon Brasche, Sebastian Ahrens, Peter Pfab
  • Publication number: 20130289299
    Abstract: The present invention relates to an improved process for batchwise or continuous isomerization of cis-2-pentenenitrile to 3-pentenenitriles in the presence of 1,4-diazabicyclo[2.2.2]octane as catalyst.
    Type: Application
    Filed: April 22, 2013
    Publication date: October 31, 2013
    Applicant: BASF SE
    Inventors: Rolf-Hartmuth Fischer, Alfred Oftring, Robert Baumann, Hermann Luyken
  • Publication number: 20130165689
    Abstract: Process for preparing one or more complexing agents selected from methylglycinediacetic acid, glutamic acid diacetic acid and salts thereof Process for preparing one or more complexing agents selected from methylglycinediacetic acid, glutamic acid diacetic acid and salts thereof by catalytic dehydrogenation of N,N-bis(2-hydroxyethyl)alanine and/or N,N-bis(2-hydroxyethyl)glutamic acid and/or salts thereof in the presence of alkali metal hydroxide, where a catalyst comprising copper and zirconium dioxide is used, the activation of which is a reduction, wherein the precursor of the catalyst in question has a degree of crystallization K, defined as K = I K · 100 I K + I A , in the range from 0 to 50%.
    Type: Application
    Filed: December 21, 2012
    Publication date: June 27, 2013
    Inventors: Robert BAUMANN, Markus Christian Biel, Axel Franzke, Alfred Oftring, Friedhelm Teich, Paul Klingelhoefer, Guido Henze, Marie Katrin Schroeter, Olesya Kister, Sabine Borchers, Pavel Tuzina, Beate Deimling, Udo Leidel
  • Publication number: 20130158294
    Abstract: Process for the preparation of racemic ?-amino acids or of glycine, wherein the corresponding ?-hydroxycarboxylic acid, selected from hydroxyacetic acid, lactic acid, malic acid, ?-hydroxyglutamic acid, isocitric acid, tartronic acid and tartaric acid, or at least one salt of the corresponding ?-hydroxycarboxylic acid is reacted in the presence of at least one heterogeneous catalyst which comprises at least one transition metal, in the presence of hydrogen with at least one nitrogen compound (c), where the nitrogen compound (c) is selected from primary and secondary amines and ammonia.
    Type: Application
    Filed: December 19, 2012
    Publication date: June 20, 2013
    Inventors: Roland BOU CHEDID, Alfred Oftring, Wolfgang Staffel, Markus Christian Biel, Johann-Peter Melder, Christian Gruenanger
  • Patent number: 8455682
    Abstract: Provided is a method for the production of aminodicarboxylic acid N,N-diacetic acids of formula (I), wherein X is independently hydrogen or an alkali metal and n is 1 or 2. Aminodicarboxylic acid-N,N-diacetic acids of high purity can be yielded. The method involves: a) reacting an aminodicarboxylic acid, with 0.8 to 1.2 mole equivalents of formaldehyde and with 0.8 to 1.2 mole equivalents of hydrocyanic acid; b) reacting the reaction products of a) with 0.8 to 1.2 mole equivalents of hydrocyanic acid and with 0.8 to 1.2 mole equivalents of formaldehyde; c) hydrolyzing in the reaction product obtained in b).
    Type: Grant
    Filed: March 2, 2009
    Date of Patent: June 4, 2013
    Assignee: BASF SE
    Inventors: Alfred Oftring, Armin Stamm, Friedrich Wirsing, Gerold Braun
  • Patent number: 8440852
    Abstract: The invention relates to a process for preparing tetraethylenepentamine (TEPA) by hydrogenation of diethylenetriaminediacetonitrile (DETDN) over a catalyst. If appropriate, DETDN can also be present as a constituent of an amino nitrile mixture which additionally comprises diethylenetriaminemonoacetonitrile (DETMN).
    Type: Grant
    Filed: February 27, 2008
    Date of Patent: May 14, 2013
    Assignee: BASF SE
    Inventors: Kirsten Dahmen, Alfred Oftring, Randolf Hugo, Thilo Hahn, Katrin Baumann, Johann-Peter Melder
  • Publication number: 20120302783
    Abstract: What is proposed is a process for preparing aminopolycarboxylates proceeding from the corresponding polyalkanolamines by oxidative dehydrogenation in the presence of a catalyst comprising 1 to 90% by weight of copper, based on the total weight of the catalyst, using a base, which comprises first performing a partial conversion of the polyalkanolamine to a reaction mixture comprising the aminopolycarboxylate at a temperature in the range from 140 to 180° C. until at least 10 to 90 mol % of the polyalkanolamine has been depleted, and then continuing the conversion at elevated temperature.
    Type: Application
    Filed: April 2, 2012
    Publication date: November 29, 2012
    Applicant: BASF SE
    Inventors: Robert BAUMANN, Markus Christian Biel, Axel Franzke, Alfred Oftring, Friedhelm Teich, Paul Klingelhoefer, Marie Katrin Schröter