Patents by Inventor Dirk Meckelnburg

Dirk Meckelnburg 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).

  • Publication number: 20210179758
    Abstract: Process for producing aqueous polyacrylamide solutions by polymerizing an aqueous solution comprising at least acrylamide thereby obtaining an aqueous polyacrylamide gel and dissolving said aqueous polyacrylamide gel in water, wherein the process is carried out in a modular, relocatable plant. The plant preferably is deployed at a location at which aqueous polyacrylamide solutions are used, for example on an oilfield or in a mining area.
    Type: Application
    Filed: October 18, 2018
    Publication date: June 17, 2021
    Inventors: Hazel SPRAFKE, Markus OSTERMAYR, Tobias Joachim ZIMMERMANN, Dirk MECKELNBURG, Dennis LOESCH, Faissal-Ali EL-TOUFAILI
  • Publication number: 20210070904
    Abstract: Process for producing aqueous polyacrylamide solutions by polymerizing an aqueous solution comprising at least acrylamide thereby obtaining an aqueous polyacrylamide gel and dissolving said aqueous polyacrylamide gel in water, wherein the manufacturing steps are allocated to two different locations A and B and the process comprises the step of transporting an aqueous polyacrylamide gel hold in a transportable polymerization unit from a location A to a location B. Modular, relocatable plant for manufacturing aqueous polyacrylamide solutions wherein the units of the plant are located at two different locations A and B.
    Type: Application
    Filed: October 18, 2018
    Publication date: March 11, 2021
    Applicant: BASF SE
    Inventors: Dennis LOESCH, Tobias Joachim ZIMMERMANN, Hazel SPRAFKE, Dirk MECKELNBURG, Markus OSTERMAYR, Faissal-Ali EL-TOUFAILI
  • Patent number: 10927222
    Abstract: A process for producing an aqueous polymer solution, including: (a) providing a hydrated polymer that has been prepared by aqueous solution polymerisation of ethylenically unsaturated monomers, which hydrated polymer contains at least 10% by weight active polymer; (b) cutting the hydrated polymer by subjecting the hydrated polymer to at least one cutting stage containing at least one stream of aqueous liquid at a pressure of at least 150 bar to reduce the size of the hydrated polymer; and (c) dissolving the hydrated polymer in an aqueous liquid so as to obtain an aqueous polymer solution. An apparatus for producing an aqueous polymer solution.
    Type: Grant
    Filed: April 20, 2017
    Date of Patent: February 23, 2021
    Assignee: BASF SE
    Inventors: Sandra Jeck, Oliver Soetje, Tobias Bringmann, Gabriela Eugenia Fonseca Zepeda, Dirk Meckelnburg, Dennis Loesch, Bjoern Langlotz, John Barratt, Faissal-Ali El-Toufaili, Hazel Sprafke, Bernd Schube, Markus Ostermayr
  • Publication number: 20200308314
    Abstract: Process for producing aqueous polyacrylamide solutions by polymerizing an aqueous solution comprising at least acrylamide thereby obtaining an aqueous polyacrylamide gel and dissolving said aqueous polyacrylamide gel in water, wherein the manufacturing steps are allocated to two different locations A and B and the process comprises the step of transporting an aqueous monomer premix from a location A to a location B. Modular, relocatable plant for manufacturing aqueous polyacrylamide solutions wherein the units of the plant are located at two different locations A and B.
    Type: Application
    Filed: October 18, 2018
    Publication date: October 1, 2020
    Inventors: Hazel SPRAFKE, Dirk MECKELNBURG, Dennis LOESCH, Markus OSTERMAYR, Tobias Joachim ZIMMERMANN, Faissal-Ali EL-TOUFAILI
  • Publication number: 20200283675
    Abstract: Process for producing aqueous polyacrylamide solutions by polymerizing an aqueous solution comprising at least acrylamide thereby obtaining an aqueous polyacrylamide gel and dissolving said aqueous polyacrylamide gel in water, wherein the manufacturing steps are allocated to two different locations A and B and the process comprises the step of transporting an aqueous polyacrylamide gel hold in a transportable polymerization unit from a location A to a location B. The transportable polymerization unit comprises a cylindrical upper part, a conical part at its lower end, feeds for the aqueous monomer solution, a closable bottom opening, and means allowing to deploy the polymerization unit in a vertical manner.
    Type: Application
    Filed: October 18, 2018
    Publication date: September 10, 2020
    Inventors: Hazel SPRAFKE, Tobias Joachim ZIMMERMANN, Dirk MECKELNBURG, Dennis LOESCH, Markus OSTERMAYR, Faissal-Ali EL-TOUFAILI
  • Publication number: 20190292330
    Abstract: A process for producing an aqueous polymer solution, including: (a) providing a hydrated polymer that has been prepared by aqueous solution polymerisation of ethylenically unsaturated monomers, which hydrated polymer contains at least 10% by weight active polymer; (b) cutting the hydrated polymer by subjecting the hydrated polymer to at least one cutting stage containing at least one stream of aqueous liquid at a pressure of at least 150 bar to reduce the size of the hydrated polymer; and (c) dissolving the hydrated polymer in an aqueous liquid so as to obtain an aqueous polymer solution. An apparatus for producing an aqueous polymer solution.
    Type: Application
    Filed: April 20, 2017
    Publication date: September 26, 2019
    Applicant: BASF SE
    Inventors: Sandra JECK, Oliver SOETJE, Tobias BRINGMANN, Gabriela Eugenia FONSECA ZEPEDA, Dirk MECKELNBURG, Dennis LOESCH, Bjoern LANGLOTZ, John BARRATT, Faissal-Ali EL-TOUFAILI, Hazel SPRAFKE, Bernd SCHUBE, Markus OSTERMAYR
  • Publication number: 20190153300
    Abstract: A method for preparing an aqueous polyacrylamide solution, where the method includes: hydrating acrylonitrile in water in presence of a biocatalyst capable of converting acrylonitrile to acrylamide so as to obtain an acrylamide solution; directly polymerizing the acrylamide solution so as to obtain a polyacrylamide gel; and directly dissolving the polyacrylamide gel by addition of water so as to obtain an aqueous polyacrylamide solution, wherein the polyacrylamide gel is dissolved by water jet cutting.
    Type: Application
    Filed: April 25, 2017
    Publication date: May 23, 2019
    Applicant: BASF SE
    Inventors: Hazel SPRAFKE, Faissal-Ali EL-TOUFAILI, Bjoern LANGLOTZ, John BARRATT, Tobias BRINGMANN, Gabriela Eugenia FONSECA ZEPEDA, Sandra JECK, Dennis LOESCH, Dirk MECKELNBURG, Markus OSTERMAYR, Bernd SCHUBE, Oliver SOETJE
  • Publication number: 20190144574
    Abstract: A method for preparing an aqueous polyacrylamide solution is disclosed. The method comprises:—hydrating acrylonitrile in water in presence of a biocatalyst capable of converting acrylonitrile to acrylamide so as to obtain an acrylamide solution,—directly polymerizing the acrylamide solution so as to obtain a polyacrylamide gel, and—directly dissolving the polyacrylamide gel by addition of water so as to obtain an aqueous polyacrylamide solution.
    Type: Application
    Filed: April 25, 2017
    Publication date: May 16, 2019
    Applicant: BASF SE
    Inventors: Hazel SPRAFKE, Faissal-Ali EL-TOUFAILI, Bjoern LANGLOTZ, John BARRATT, Tobias BRINGMANN, Gabriela Eugenia FONSECA ZEPEDA, Sandra JECK, Dennis LOESCH, Dirk MECKELNBURG, Markus OSTERMAYR, Bernd SCHUBE, Oliver SOETJE
  • Patent number: 8957257
    Abstract: A process for a continuous production of a polyetherol first involves reacting a catalyst (5) with an alcohol starter (3) or an alkoxylated precursor, to give a mixture comprising an alcoholate and water. Water is then removed from the mixture. The process further involves feeding the alcoholate into a bubble column and feeding an alkylene oxide into the bottom of a compartment of the bubble column, such that the alkylene oxide rises in the alcoholate. The alkylene oxide then reacts with the alcoholate or a secondary product from the reaction between the alcoholate and alkylene oxide, to give the polyetherol.
    Type: Grant
    Filed: July 18, 2012
    Date of Patent: February 17, 2015
    Assignee: BASF SE
    Inventors: Vinit Chilekar, Oliver Bey, Andreas Brodhagen, Achim Loffler, Fatemeh Admadnian, Ralf Bohling, Christoph Grossmann, Ulrich Kammel, Ronald Adelmann, Thomas Ostrowski, Milind Joshi, Gerrit Waters, Dirk Meckelnburg
  • Publication number: 20140256887
    Abstract: The present invention relates to a process for preparing polyamides, comprising a hydrolytic polymerization and at least two extraction steps which are not in immediate succession.
    Type: Application
    Filed: March 6, 2014
    Publication date: September 11, 2014
    Applicant: BASF SE
    Inventors: Gad Kory, Silke Biedasek, Faissal-Ali El-Toufaili, Achim Stammer, Reinhard Lang, Dirk Meckelnburg
  • Publication number: 20130023700
    Abstract: A process for a continuous production of a polyetherol first involves reacting an alcohol with a starter or an alkoxylated precursor, to give a mixture comprising an alcoholate and water. Water is then removed from the mixture. The process further involves feeding the alcoholate into a bubble column and feeding an alkylene oxide into the bottom of a compartment of the bubble column, such that the alkylene oxide rises in the alcoholate. The alkylene oxide then reacts with the alcoholate or a secondary product from the reaction between the alcoholate and alkylene oxide, to give the polyetherol.
    Type: Application
    Filed: July 18, 2012
    Publication date: January 24, 2013
    Applicant: BASF SE
    Inventors: Vinit Chilekar, Oliver Bey, Andreas Brodhagen, Achim Löffler, Fatemeh Ahmadnian, Ralf Böhling, Christoph Grossmann, Ulrich Kammel, Ronald Adelmann, Thomas Ostrowski, Milind Joshi, Gerrit Waters, Dirk Meckelnburg
  • Publication number: 20120214889
    Abstract: The present invention relates to processes for preparing copolymers A) with a reduced soil particle content, comprising 49.2 to 93.2% by weight of structural units which derive from one or more vinylaromatic monomers (component A1)), 6 to 50% by weight of structural units which derive from one or more vinyl cyanides (component A2)), 0.
    Type: Application
    Filed: October 25, 2010
    Publication date: August 23, 2012
    Applicant: BASF SE
    Inventors: Martin Weber, Peter Ittemann, Axel Gottschalk, Bernd Niedermaier, Birgit Reinhard, Dirk Meckelnburg
  • Publication number: 20120130134
    Abstract: A process for the preparation of polyetherols, comprising the following steps: a) reaction of at least one starter compound with at least one alkylene oxide and a catalyst to give a crude polyetherol and b) removal of low molecular weight byproducts from the crude polyetherol from step a), wherein the crude polyetherol is treated with a stripping gas in a column having internals.
    Type: Application
    Filed: July 27, 2010
    Publication date: May 24, 2012
    Applicant: BASF SE
    Inventors: Matthias Schopohl, Thomas Ostrowski, Dirk Meckelnburg, Renata Jovanovic, Achim Loeffler, Hans-Juergen Pallasch, Thorsten Friese, Eckard Schauss, Susanne Szeschkus, Vinit Chilekar, Hans Volkmar Schwarz
  • Patent number: 8022146
    Abstract: A thermoplastic copolymer prepared from acrylonitrile and para-alpha-dimethylstyrene via bulk or solution polymerization has an improved heat distortion temperature and can be used together with graft copolymers and further components for the preparation of thermoplastic moldings.
    Type: Grant
    Filed: November 11, 2008
    Date of Patent: September 20, 2011
    Assignee: BASF SE
    Inventors: Gerrit Luinstra, Florian Becker, Matthias Müller, Dirk Meckelnburg, Jens Assmann
  • Publication number: 20100261870
    Abstract: The invention provides a process for preparing polyether alcohols by adding alkylene oxides onto H-functional starter substances, of which at least one is solid at room temperature in a reaction vessel, by feeding the starting components continuously to the reaction vessel, which comprises preparing a paste from the solid starter substance and feeding this paste continuously to the reaction vessel.
    Type: Application
    Filed: December 16, 2008
    Publication date: October 14, 2010
    Applicant: BASF SE
    Inventors: Achim Loeffler, Eckard Schauss, Matthias Schopohl, Dirk Meckelnburg
  • Publication number: 20100261831
    Abstract: A thermoplastic copolymer prepared from acrylonitrile and para-alpha-dimethylstyrene via bulk or solution polymerization has an improved heat distortion temperature and can be used together with graft copolymers and further components for the preparation of thermoplastic moldings.
    Type: Application
    Filed: November 11, 2008
    Publication date: October 14, 2010
    Applicant: BASF SE
    Inventors: Gerrit Luinstra, Florian Becker, Matthias Müller, Dirk Meckelnburg, Jens Assmann
  • Patent number: 7723465
    Abstract: The invention provides a process for continuously preparing polyether alcohols using DMC catalysts, which comprises, in a first step, in a continuous reactor, adding alkylene oxides onto H-functional starter substances and transferring the output of this reactor to a second step in a reactor which is divided by closed trays into mutually separate sections, known as compartments, which are connected to one another by external pipelines, in which the output of the reactor from the first step of the reaction passes through the compartments in succession.
    Type: Grant
    Filed: July 11, 2006
    Date of Patent: May 25, 2010
    Assignee: BASF Aktiengesellschaft
    Inventors: Stephan Herwig, Thomas Ostrowski, Dirk Meckelnburg, Achim Loeffler, Renata Jovanovic, Werner Weinle
  • Publication number: 20090292147
    Abstract: The invention relates to a process for the continuous preparation of polyether alcohols by reacting H-functional initiators with alkylene oxides using basic catalysts, wherein at least one initiator is metered with at least one alkylene oxide continuously into a back-mixing reactor and the reaction product is removed continuously from the back-mixing reactor.
    Type: Application
    Filed: June 15, 2007
    Publication date: November 26, 2009
    Applicant: BASF SE
    Inventors: Thomas Ostrowski, Johannes Adam, Dirk Meckelnburg, Ulrike Mahn, Renata Jovanovic, Achim Loeffler
  • Publication number: 20080214778
    Abstract: The invention provides a process for continuously preparing polyether alcohols using DMC catalysts, which comprises, in a first step, in a continuous reactor, adding alkylene oxides onto H-functional starter substances and transferring the output of this reactor to a second step in a reactor which is divided by closed trays into mutually separate sections, known as compartments, which are connected to one another by external pipelines, in which the output of the reactor from the first step of the reaction passes through the compartments in succession.
    Type: Application
    Filed: July 11, 2006
    Publication date: September 4, 2008
    Applicant: BASF Aktiengsellschaft
    Inventors: Stephan Herwig, Thomas Ostrowski, Dirk Meckelnburg, Achim Loffler, Renata Jovanovic, Werner Weinle
  • Publication number: 20040021080
    Abstract: In a method of measuring the fill level of a reactor in continuously operated polymerization processes using measurement of the respective phase interface in the reactor by means of ionizing radiation, at least one measuring unit comprising a radiation source which emits ionizing radiation and a corresponding detector is brought to the phase interface in the reactor and flexibly installed there, with the fill level of the reactor being measured by determining the phase interface by means of the radioactive backscattering measurement.
    Type: Application
    Filed: July 15, 2003
    Publication date: February 5, 2004
    Inventors: Wofgang Bidell, Gerard Lutz, Franz Langhauser, Gunther Scherer, Dirk Meckelnburg, Jurgen Oelze, Hans-Jurgen Gerbig, Jurgen Huhnerben