Patents by Inventor Andreas Woelfert

Andreas Woelfert 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: 10576449
    Abstract: The invention relates to a reactor for carrying out heterogeneously catalyzed gas-phase reactions, having an internal element (11, 35) or a plurality of internal elements (11, 35) which are arranged in succession in the flow direction of the gas mixture of the heterogeneously catalyzed gas-phase reaction through the reactor (10), where the internal elements extend over the entire reactor cross section, wherein the one or more internal elements (11, 35) is/are at least partly made of a fiber composite ceramic material.
    Type: Grant
    Filed: December 16, 2016
    Date of Patent: March 3, 2020
    Assignee: BASF SE
    Inventors: Gerhard Olbert, Andreas Wölfert, Holger Friedrich
  • Publication number: 20190100547
    Abstract: The present invention relates to a method for preparing 2?-O-fucosyllactose and to the protected fucosyl donor of the formula (I) used in this method. The method comprises reacting the fucose derivative of the formula (I) below with the compound of the general formula (II), in the presence of an activating reagent.
    Type: Application
    Filed: March 8, 2017
    Publication date: April 4, 2019
    Inventors: MICHAEL PUHL, Stephanie RENZ, Andreas WOELFERT
  • Publication number: 20180369780
    Abstract: The invention relates to a reactor for carrying out heterogeneously catalyzed gas-phase reactions, having an internal element (11, 35) or a plurality of internal elements (11, 35) which are arranged in succession in the flow direction of the gas mixture of the heterogeneously catalyzed gas-phase reaction through the reactor (10), where the internal elements extend over the entire reactor cross section, wherein the one or more internal elements (11, 35) is/are at least partly made of a fiber composite ceramic material.
    Type: Application
    Filed: December 16, 2016
    Publication date: December 27, 2018
    Inventors: Gerhard OLBERT, Andreas WÖLFERT, Holger FRIEDRICH
  • Publication number: 20180305210
    Abstract: The present invention relates to a reactor R with apparatus D, the latter comprising a gas- and/or liquid-permeable tray B, in the edge region of which there is disposed a lateral boundary W which fully encloses the tray B and forms a volume V comprising catalytic and/or noncatalytic shaped bodies (F), wherein there is at least one braid made of precious metal and/or base metal on the upstream side opposite the tray B, and the catalytic and/or noncatalytic shaped bodies (F) are selected from (i) shaped bodies (F1) in the form of straight prisms, the footprint of which is selected from triangle, rectangle, hexagon or fragments of these polygons, and (ii) a combination of the shaped bodies (F1) with shaped bodies (F2) that are smaller than the shaped bodies (F1), wherein groups of m to n shaped bodies (F1), m and n being an integer from 3 to 30 with n>m, are framed in a metal cassette open in the upstream direction and closed in the downstream direction by a gas-permeable tray, in a virtually seamless manner
    Type: Application
    Filed: November 18, 2016
    Publication date: October 25, 2018
    Inventors: Gerhard OLBERT, Jochen GAUER, Holger FRIEDRICH, Andreas SPIEGEL, Andreas WÖLFERT, Wolfgang GMEINER, Michael LORENZ
  • Patent number: 9725320
    Abstract: A device D accommodated in a reactor R and containing a gas- and/or liquid-permeable bottom B, in the peripheral region of which is arranged a lateral boundary W which completely surrounds the bottom B and forms a volume V which is partially or completely filled with catalytic and/or non-catalytic moldings, there optionally being located on the side facing the bottom B in the upstream direction at least one noble metal and/or non-noble metal fabric, wherein a thermal insulation layer S is located on at least part of the surface of the inner side of the lateral boundary W of the device D, the material for the thermal insulation layer S being selected from the group consisting of ceramic material, microporous material and silicate fibers.
    Type: Grant
    Filed: August 6, 2014
    Date of Patent: August 8, 2017
    Assignee: BASF SE
    Inventors: Gerhard Olbert, Holger Friedrich, Andreas Wölfert, Robert Kuhn, Tobias Lenke, Wolfgang Gmeiner
  • Publication number: 20160200575
    Abstract: A device D accommodated in a reactor R and containing a gas- and/or liquid-permeable bottom B, in the peripheral region of which is arranged a lateral boundary W which completely surrounds the bottom B and forms a volume V which is partially or completely filled with catalytic and/or non-catalytic moldings, there optionally being located on the side facing the bottom B in the upstream direction at least one noble metal and/or non-noble metal fabric, wherein a thermal insulation layer S is located on at least part of the surface of the inner side of the lateral boundary W of the device D, the material for the thermal insulation layer S being selected from the group consisting of ceramic material, microporous material and silicate fibers.
    Type: Application
    Filed: August 6, 2014
    Publication date: July 14, 2016
    Applicant: BASF SE
    Inventors: Gerhard OLBERT, Holger FRIEDRICH, Andreas WÖLFERT, Robert KUHN, Tobias LENKE, Wolfgang GMEINER
  • Patent number: 9067872
    Abstract: A process for compressing a hydrogen-sulfide-comprising gas stream, which comprises (i) compressing the hydrogen-sulfide-comprising gas stream in a compressor, (ii) flushing the compressor with a mixture comprising dialkyl polysulfides, dialkyl disulfides and at least one amine; a process for producing sulfur compounds, selected from the group consisting of alkylmercaptans, dialkyl disulfides and alkanesulfonic acids, which comprises the conversion of hydrogen-sulfide-comprising gas streams, wherein the hydrogen-sulfide-comprising gas streams are compressed according to the process comprising steps i) and ii); and also the use of a mixture comprising dialkyl polysulfides, dialkyl disulfides and at least one amine for removing sulfur deposits which occur in the compression of hydrogen-sulfide-comprising gas streams.
    Type: Grant
    Filed: December 22, 2009
    Date of Patent: June 30, 2015
    Assignee: BASF SE
    Inventors: Andreas Woelfert, Frank Grzonkowski, Harald Jachow, Guenter Renz
  • Patent number: 9061971
    Abstract: The present invention comprises a process for purifying isocyanate-comprising residues.
    Type: Grant
    Filed: September 21, 2006
    Date of Patent: June 23, 2015
    Assignee: BASF Aktiengesellschaft
    Inventors: Andreas Wölfert, Carsten Knösche, Matthias Klötzer, Hermann Ascherl, Eckhard Stroefer, Heinrich-Josef Blankertz, Michael Schönherr, Martin Karches, Christian Benz
  • Patent number: 8829232
    Abstract: The invention relates to a process for preparing isocyanates by reacting the corresponding amines with phosgene in the liquid phase, if appropriate in the presence of at least one inert medium, in which the amine and the phosgene are first mixed in a mixing chamber (1) to give a reaction mixture and the reaction mixture is fed to a reactor, the amine being added through an orifice (3) arranged coaxially to the mixing chamber (1) and the phosgene being added through feed orifices (5) in at least two planes (7, 9) arranged at right angles to the axis (11) of the mixing chamber (1), or the phosgene being added through the orifice (3) arranged coaxially to the mixing chamber and the amine through the feed orifices (5) in at least two planes (7, 9) arranged at right angles to the axis (11) of the mixing chamber (1). At least one plane (9) is arranged upstream and at least one plane (7) downstream of the orifice (3) arranged coaxially to the mixing chamber (1) in main flow direction of the reaction mixture.
    Type: Grant
    Filed: August 6, 2009
    Date of Patent: September 9, 2014
    Assignee: BASF SE
    Inventors: Ulrich Penzel, Torsten Mattke, Andreas Wölfert, Johannes Jacobs, Tsung-Chieh Cheng, Kerstin Heinen, Eckhard Stroefer, Stefan Maixner, Wolfgang Mackenroth, Christian Tragut, Kai Thiele, Myung Un Won
  • Publication number: 20140227160
    Abstract: The material proposed for sealing off cavities between structural components formed of materials having different thermal characteristics comprises an intumescent mat completely sealed in a polymeric film and the interior bounded by the polymeric film and containing the intumescent mat is evacuated.
    Type: Application
    Filed: February 14, 2014
    Publication date: August 14, 2014
    Applicant: BASF SE
    Inventors: Gerhard Olbert, Jochen Gauer, Robert Kuhn, Andreas Wölfert, Holger Friedrich
  • Patent number: 8580208
    Abstract: The present invention describes a reactor (1) for continuously preparing hydrogen sulfide H2S from hydrogen and sulfur, comprising a distributor device (15) for distributing gaseous hydrogen in a sulfur melt (9) present at least in a lower part of the reactor. The distributor device (15) is arranged in the sulfur melt (9) and comprises a distributor plate (16) which is arranged in the reactor (1) and has an edge (17) extending downward and, if appropriate, has passage orifices (19). The hydrogen from a hydrogen bubble which forms below the distributor plate (16) is (for example through the passage orifices (19)) distributed in the sulfur melt (9) via the distributor plate (16).
    Type: Grant
    Filed: December 9, 2010
    Date of Patent: November 12, 2013
    Assignee: BASF SE
    Inventors: Andreas Woelfert, Herald Jachow, Heinz Driess
  • Patent number: 8546606
    Abstract: The invention relates to a process for preparing polyisocyanates by reacting primary amines with phosgene, which comprises the steps a) mixing the amine with the phosgene, b) reacting the amine with the phosgene in a residence reactor and, if desired, c) transferring the output from the reactor of step b) into a distillation column, wherein the residence reactor in step b) is configured as a tube reactor.
    Type: Grant
    Filed: February 20, 2004
    Date of Patent: October 1, 2013
    Assignee: BASF Aktiengesellschaft
    Inventors: Andreas Brodhagen, Martin Sohn, Filip Nevejans, Eckhard Stroefer, Andreas Woelfert, Steffen Oehlenschlaeger
  • Patent number: 8436204
    Abstract: The invention provides a process for preparing isocyanates by reacting amines with phosgene, wherein the amine or a mixture of amine and a solvent is mixed in the form of an aerosol with gaseous phosgene and the amine is subsequently reacted with phosgene.
    Type: Grant
    Filed: July 5, 2007
    Date of Patent: May 7, 2013
    Assignee: BASF Aktiengesellschaft
    Inventors: Carsten Knoesche, Eckhard Stroefer, Dieter Stuetzer, Bernd Sachweh, Markus Linsenbuhler, Andreas Woelfert
  • Patent number: 8288584
    Abstract: The present invention relates to a process for preparing diisocyanates from diamines and phosgene in the gas phase.
    Type: Grant
    Filed: September 11, 2008
    Date of Patent: October 16, 2012
    Assignee: BASF SE
    Inventors: Carsten Knoesche, Andreas Woelfert, Torsten Mattke, Eckhard Stroefer, Heinrich-Josef Blankertz, Bernhard Geissler
  • Patent number: 8258337
    Abstract: The present invention relates to a process for preparing isocyanates and an apparatus suitable for this purpose, and also its use. In the process, an amine and phosgene, both in the gas phase, react in the presence of an inert medium. A number, n, of amine streams are reacted with a number, n +1, of phosgene streams in a reactor. The number n is a positive integer of at least 1. All amine and phosgene streams are introduced into the reactor through annular gaps for mixing.
    Type: Grant
    Filed: August 23, 2006
    Date of Patent: September 4, 2012
    Assignee: BASF Aktiengesellschaft
    Inventors: Andreas Woelfert, Carsten Knoesche, Andreas Daiss, Tsung-Chieh Cheng, Torsten Mattke, Eckhard Stroefer
  • Patent number: 8173833
    Abstract: The present invention relates to a process for preparing isocyanates.
    Type: Grant
    Filed: November 6, 2007
    Date of Patent: May 8, 2012
    Assignee: BASF Aktiengesellschaft
    Inventors: Andreas Woelfert, Andreas Daiss, Torsten Mattke
  • Patent number: 8168818
    Abstract: The invention relates to a process for preparing isocyanates in the gas phase.
    Type: Grant
    Filed: November 6, 2007
    Date of Patent: May 1, 2012
    Assignee: BASF Aktiengesellschaft
    Inventors: Andreas Daiss, Andreas Woelfert, Carsten Knoesche, Eckhard Stroefer
  • Patent number: 8088944
    Abstract: Isocyanates are prepared by a process in which a product stream from the isocyanate synthesis is purified.
    Type: Grant
    Filed: September 20, 2006
    Date of Patent: January 3, 2012
    Assignee: BASF SE
    Inventors: Andreas Woelfert, Hans-Juergen Pallasch, Eckhard Stroefer, Heinrich-Josef Blankertz
  • Publication number: 20110263894
    Abstract: A process for compressing a hydrogen-sulfide-comprising gas stream, which comprises (i) compressing the hydrogen-sulfide-comprising gas stream in a compressor, (ii) flushing the compressor with a mixture comprising dialkyl polysulfides, dialkyl disulfides and at least one amine; a process for producing sulfur compounds, selected from the group consisting of alkylmercaptans, dialkyl disulfides and alkanesulfonic acids, which comprises the conversion of hydrogen-sulfide-comprising gas streams, wherein the hydrogen-sulfide-comprising gas streams are compressed according to the process comprising steps i) and ii); and also the use of a mixture comprising dialkyl polysulfides, dialkyl disulfides and at least one amine for removing sulfur deposits which occur in the compression of hydrogen-sulfide-comprising gas streams.
    Type: Application
    Filed: December 22, 2009
    Publication date: October 27, 2011
    Applicant: BASF SE
    Inventors: Andreas Woelfert, Frank Grzonkowski, Harald Jachow, Guenter Renz
  • Patent number: 8021624
    Abstract: The invention relates to a reactor (1) and a process for continuously preparing H2S by converting a reactant mixture which comprises essentially gaseous sulfur and hydrogen over a catalyst, comprising a sulfur melt (9) at least in a lower subregion (8) of the reactor (1), into which gaseous hydrogen is introduced. The catalyst is arranged in at least one U-shaped tube (21) which is partly in contact with the sulfur melt (9), the at least one U-shaped tube (21) having at least one entry orifice (23) on a limb (26) above the sulfur melt (9), through which the reactant mixture can enter the U-shaped tube (21) from a reactant region (10) of the reactor (1), having a flow path within the at least one U-shaped tube, along which the reactant mixture can be converted in a reaction region comprising the catalyst (22), and having at least one exit orifice (24) in another limb (27) through which a product can exit into a product region (7).
    Type: Grant
    Filed: January 14, 2008
    Date of Patent: September 20, 2011
    Assignee: BASF SE
    Inventors: Andreas Wölfert, Herald Jachow, Heinz Drieβ