Patents Assigned to Evonik Degussa GmbH
  • Patent number: 10441942
    Abstract: The reaction tube for preparing hydrogen cyanide comprises a cylindrical tube composed of ceramic, a catalyst comprising platinum applied to the inner wall of the tube and also at least one insert composed of ceramic, having three or four fins pointing from the tube axis to the inner wall of the tube, which is inserted into the cylindrical tube, wherein the fins divide the tube interior space into substantially straight channels with substantially identical circle segment cross sections and wherein the mean gap between the ends of the fins and the inner wall of the tube is in the range of 0.1 to 3 mm. In the method for preparing hydrogen cyanide, ammonia and at least one aliphatic hydrocarbon having 1 to 4 carbon atoms are reacted in the reaction tube at 1000 to 1400° C.
    Type: Grant
    Filed: October 2, 2014
    Date of Patent: October 15, 2019
    Assignee: Evonik Degussa, GmbH
    Inventors: Martin Steffan, Martin Steurenthaler, Thomas Müller, Martin Körfer, Steffen Krill
  • Patent number: 10440974
    Abstract: The present invention relates to a novel liquid or crystalline methionine composition, obtained by means of biomass bioconversion by means of microorganisms that are suitable for producing methionine.
    Type: Grant
    Filed: January 6, 2017
    Date of Patent: October 15, 2019
    Assignee: Evonik Degussa GmbH
    Inventor: Patrick Fuertes
  • Publication number: 20190307657
    Abstract: The present invention relates to oral care compositions comprising at least one biosurfactant and fluoride.
    Type: Application
    Filed: January 31, 2018
    Publication date: October 10, 2019
    Applicant: Evonik Degussa GmbH
    Inventors: Hans Henning Wenk, Kathrin Daniela Brandt, Martin Schilling, Verena Dahl, Jochen Kleinen, Joachim Venzmer
  • Patent number: 10435602
    Abstract: The invention relates to hotmelt adhesives based on polyesters, having low VOC and fogging values. In particular, the invention relates to reactive hotmelt adhesives including polyesters containing at least 50 mole percent, based on the polycarboxylic acid components, of terephthalic acid or a derivative thereof and containing at least 40 mole percent, based on the polyol components, of diols of the formula HO—(CH2)x—OH with x?6.
    Type: Grant
    Filed: February 26, 2016
    Date of Patent: October 8, 2019
    Assignee: Evonik Degussa GmbH
    Inventors: Christina Cron, Gabriele Brenner, Bernhard Schleimer
  • Publication number: 20190300553
    Abstract: The present invention relates to a process for preparing isocyanate containing alkoxysilane groups, in which, in the sequence of steps A) to D), A) alkoxysilanoalkylamine is reacted with urea in the presence of an alcohol, optionally in the presence of at least one catalyst, to give alkoxysilanoalkylurethane, B) simultaneously or successively, if used, the catalyst is removed and/or deactivated, and low boilers, medium boilers and/or high boilers are removed, C) purified alkoxysilanoalkylurethane is thermally cleaved to release isocyanate containing alkoxysilane groups and by-product, leaving bottoms material, and D) isocyanate containing alkoxysilane groups and by-product are separated from one another and from bottoms material and collected, in which, in step C), i) the bottoms material is wholly or partly discharged from the cleavage apparatus, ii) subjected to thermal treatment and/or purification and/or an aftertreatment in the presence of alcohol and iii) the material removed, after thermal treatment
    Type: Application
    Filed: March 18, 2019
    Publication date: October 3, 2019
    Applicant: Evonik Degussa GmbH
    Inventors: Manfred Kreczinski, Stephan Kohlstruk, Dirk Hoppe, Emmanouil Spyrou
  • Publication number: 20190300551
    Abstract: The invention relates to a process for preparing isocyanate containing alkoxysilane groups, in which, in the sequence of steps A) to D), A) haloalkylalkoxysilane is reacted with metal cyanate and alcohol to give alkoxysilanoalkylurethane, B) alkoxysilanoalkylurethane is freed of low boilers, solids, salt burdens and/or high boilers and optionally purified, C) alkoxysilanoalkylurethane obtained after B) is thermally cleaved to release isocyanate containing alkoxysilane groups and by-product, leaving bottoms material, and D) isocyanate containing alkoxysilane groups and by-product are separated from one another and from cleavage bottoms material and collected, wherein the process regime at least of steps C) to D) is continuous.
    Type: Application
    Filed: March 18, 2019
    Publication date: October 3, 2019
    Applicant: Evonik Degussa GmbH
    Inventors: Manfred Kreczinski, Stephan Kohlstruk, Emmanouil Spyrou, Dirk Hoppe
  • Publication number: 20190300917
    Abstract: The invention provides a process for preparing sphingolipids, compositions comprising sphingolipids and further components, and for the use of the compositions.
    Type: Application
    Filed: March 18, 2019
    Publication date: October 3, 2019
    Applicant: Evonik Degussa GmbH
    Inventors: Marrit Friederike Eckstein, Monica Desiree van Logchem, Hans Henning Wenk, Annika Schrader, Ursula Maczkiewitz, Claudia Hierath, Sunay Karacocuk, Andreas Seifert
  • Publication number: 20190300550
    Abstract: The invention relates to a process for preparing isocyanate containing alkoxysilane groups, in which, in the sequence of steps A) to D), A) alkoxysilano(cyclo)alkylamine is reacted with dialkyl carbonate in the presence of a basic catalyst to give alkoxysilano(cyclo)alkylurethane, B) simultaneously or successively, the catalyst is deactivated, and low boilers, solids, salt burdens and/or high boilers are removed, C) alkoxysilano(cyclo)alkylurethane obtained after B) is thermally cleaved to release isocyanate containing alkoxysilane groups and by-product, leaving bottoms material, and D) isocyanate containing alkoxysilane groups and by-product are separated from one another and from bottoms material and collected, pa wherein the process regime at least of steps C) to D) is continuous.
    Type: Application
    Filed: March 15, 2019
    Publication date: October 3, 2019
    Applicant: Evonik Degussa GmbH
    Inventors: Manfred Kreczinski, Stephan Kohlstruk, Emmanouil Spyrou, Dirk Hoppe
  • Publication number: 20190300728
    Abstract: The invention relates to a process for producing a porous polyurethane coatings, using a polyol ester as additives in an aqueous polymer dispersion, the process comprising the steps of a) providing a mixture comprising an aqueous polymer dispersion, a polyol ester, and an additive, b) foaming the mixture to give a homogeneous, fine-cell foam, c) adding at least one thickener to establish the desired viscosity of the wet foam, d) applying a coating of the foamed polymer dispersion to a suitable carrier, e) drying the coating. The invention further relates to a phosphorylated polyol ester.
    Type: Application
    Filed: July 13, 2017
    Publication date: October 3, 2019
    Applicant: Evonik Degussa GmbH
    Inventors: Michael Klostermann, Martin Glos, Jan Marian Von Hof, Verena Dahl, Christian Eilbracht, Oliver Springer, Hans Henning Wenk
  • Publication number: 20190300549
    Abstract: The invention relates to a process for preparing isocyanate containing alkoxysilane groups, in which, in the sequence of steps A) to D), A) alkoxysilano(cyclo)alkylamine is reacted with dialkyl carbonate in the presence of a basic catalyst to give alkoxysilano(cyclo)alkylurethane, B) simultaneously or successively, the catalyst is removed and/or deactivated, and low boilers, solids, salt burdens and/or high boilers are removed, C) alkoxysilano(cyclo)alkylurethane obtained after B) is thermally cleaved to release isocyanate containing alkoxysilane groups and by-product, leaving bottoms material, and D) isocyanate containing alkoxysilane groups and by-product are separated from one another and from bottoms material and collected, wherein the basic catalyst is a guanidine base.
    Type: Application
    Filed: March 15, 2019
    Publication date: October 3, 2019
    Applicant: Evonik Degussa GmbH
    Inventors: Manfred Kreczinski, Stephan Kohlstruk, Emmanouil Spyrou, Dirk Hoppe
  • Patent number: 10428035
    Abstract: In a process for the epoxidation of an olefin by continuously reacting the olefin with hydrogen peroxide in a methanol solvent on a fixed bed epoxidation catalyst comprising a titanium zeolite, the hydrogen peroxide is used as an aqueous hydrogen peroxide solution made by an anthraquinone process, the aqueous hydrogen peroxide solution is mixed with methanol to give a feed mixture and this feed mixture is filtered before being contacted with the fixed bed epoxidation catalyst.
    Type: Grant
    Filed: November 1, 2016
    Date of Patent: October 1, 2019
    Assignees: Evonik Degussa GmbH, thyssenkrupp Industrial Solutions AG
    Inventors: Matthias Pascaly, Manfred Bärz, Marc Brendel, Robert Jahn, Jürgen Schemel, Michael Dopfer
  • Patent number: 10428036
    Abstract: In a process for the epoxidation of propene, comprising the steps of reacting propene with hydrogen peroxide, separating propene oxide and a recovered propene stream from the reaction mixture, separating propane from all or a part of the recovered propene stream in a C3 splitter column, and passing the overhead product stream of the C3 splitter column to the epoxidation step, a propane starting material with a propane fraction of from 0.002 to 0.10 is used, the epoxidation is operated to provide a propane fraction in the reaction mixture of from 0.05 to 0.20 and the C3 splitter column is operated to provide an overhead product stream which comprises a propane fraction of at least 0.04 in order to reduce the size and the energy consumption of the C3 splitter column.
    Type: Grant
    Filed: November 25, 2016
    Date of Patent: October 1, 2019
    Assignees: Evonik Degussa GmbH, thyssenkrupp Industrial Solutions AG
    Inventors: Willi Hofen, Thomas Haas, Wolfgang Wöll, Bärbel Kolbe, Hans-Christian Dietz, Marc Brendel, Bernd Jaeger, Manfred Bärz, Michael Kleiber
  • Patent number: 10427390
    Abstract: A multilayer composite containing the following layers: I. a first layer (layer I) of a molding compound containing at least 40 wt. % of the following components: 1) 60 to 99 parts by wt. of a copolyamide based on hexamethylenediamine, terephthalic acid and an aliphatic dicarboxylic acid having 8 to 19 carbon atoms and 2) 40 to 1 parts by wt. of an olefinic copolymer as impact modifier, wherein the parts by wt. of 1) and 2) sum to 100; and II. a second layer (layer II) of a molding compound containing at least 60 wt. % of thermoplastic polyester, has a high heat distortion temperature, a very good impact resistance, a high elongation at break and good layer adhesion.
    Type: Grant
    Filed: March 17, 2016
    Date of Patent: October 1, 2019
    Assignee: Evonik Degussa GmbH
    Inventors: Jasmin Berger, Rainer Goering, Klaus Gahlmann, Michael Boeer, Mario Resing
  • Patent number: 10428193
    Abstract: The invention relates to a process for producing a prepreg based on polyurethane, which is notable for high storage stability at room temperature, a two-stage reaction mechanism, and adjustable adhesion on metal surfaces. It is based on the problem of making the surface tack of the prepregs controllable during processing. The solution is to assemble the PU mixture from which the matrix originates at a later stage such that the glass transition temperature of the thermoplastic polymer is above 30° C. For this purpose, the invention proposes two basically independent but certainly synergistic measures, namely: i) use of a polyol compound or a mixture of a number of polyol compounds as binder, the OH number or mean OH number of which is above 300 mg KOH/g, ii) choice of the proportion of hardener corresponding to the co-binder in the reactive composition at greater than 2% by weight, based on the total solids content of the reactive composition.
    Type: Grant
    Filed: October 28, 2016
    Date of Patent: October 1, 2019
    Assignee: Evonik Degussa GmbH
    Inventors: Uwe Stapperfenne, Marina-Elena Schmidt, Tobias Gutmann, Christina Cron, Sandra Reemers
  • Patent number: 10427135
    Abstract: Described is the production of water-absorbing polymeric particles by polymerizing a monomer solution or suspension comprising a) at least one ethylenically unsaturated acid-functional monomer which is optionally at least partly present as salt, b) at least one crosslinker and c) at least one initiator, wherein the process further comprises drying the resulting polymer and also optionally grinding the dried polymer and sieving the ground polymer and also optionally surface-postcrosslinking the dried and possibly ground and sieved polymer, and wherein the polymerization is carried out in the presence of aminopolycarboxylic acids and/or salts thereof, in particular in the presence of ethylenediaminedisuccinic acid and/or a salt thereof.
    Type: Grant
    Filed: September 9, 2015
    Date of Patent: October 1, 2019
    Assignee: Evonik Degussa GmbH
    Inventors: Christoph Loick, Ingo Loy, Dominik Gartz
  • Patent number: 10429128
    Abstract: The present invention relates to a method for heat-treating water-absorbing polymeric particles at a temperature equal to or above 150° C. in a fluidized bed dryer at a fast heat-up rate, the use of a fluidized bed dryer for heat-treating water-absorbing polymeric particles in continuous or batch mode as well as to the heat-treated polymeric particles obtained by the method of the present invention.
    Type: Grant
    Filed: December 18, 2012
    Date of Patent: October 1, 2019
    Assignee: Evonik Degussa GmbH
    Inventors: Herbert Gartner, Marc Hager, Harald Plochinger, Sabine Auernig, Hans-Peter Kohler, Elisabeth Lacker
  • Publication number: 20190292404
    Abstract: The invention relates to ahydrolysable binder based on an ABAB type polysiloxane copolymer suitable for the preparation of coating compositions with an improved anti-adhesive and/or dirt-repellent surface.
    Type: Application
    Filed: July 11, 2016
    Publication date: September 26, 2019
    Applicant: Evonik Degussa GmbH
    Inventors: Michael FIEDEL, Petra ALLEF, Georg SCHICK, Vishwa Prasad AITHA, Tim-Frederic SLOOT, Kim OEBERG HED, Marit SEIM
  • Patent number: 10422074
    Abstract: A carbon fiber material is coated with nanoparticles, where the coating contains from 0.01 to less than 10% by weight of nanoparticles, based on the dry weight of the coated fiber material, and the coating may optionally be involved in further reactions.
    Type: Grant
    Filed: March 7, 2016
    Date of Patent: September 24, 2019
    Assignee: Evonik Degussa GmbH
    Inventors: Stephan Sprenger, Matthias Naumann
  • Patent number: 10422778
    Abstract: A method for determining dimethyl disulphide proceeds by carrying out a chromatographic separation of an analyte containing at least dimethyl disulphide and methanesulphonic acid, and determining the dimethyl disulphide by pulsed amperometric detection.
    Type: Grant
    Filed: December 17, 2015
    Date of Patent: September 24, 2019
    Assignee: Evonik Degussa GmbH
    Inventors: Harald Jakob, Benjamin Fonfe, Sebastian Fuss, Andreas Doerflein, Markus Held, Nadine Duerr
  • Patent number: 10422047
    Abstract: An electrochemical method for C—C coupling a phenol and an aniline in a reaction vessel containing a suitable solvent or solvent mixture and a conductive salt to produce biaryls having both hydroxyl and amino functions, wherein the difference in the oxidation potentials ?E of the substrates ranges from 10 mV to 450 mV and the substrate with the highest oxidation potential is in excess, which method dispenses with multi-step syntheses using metallic reagents.
    Type: Grant
    Filed: February 19, 2014
    Date of Patent: September 24, 2019
    Assignee: Evonik Degussa GmbH
    Inventors: Katrin Marie Dyballa, Robert Franke, Dirk Fridag, Siegfried R. Waldvogel, Bernd Elsler