Patents by Inventor Jochen Mahrenholtz

Jochen Mahrenholtz 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).

  • Process for controlling a production process
    Patent number: 7813839
    Abstract: A production process such as an isocyanate production process, conducted with a production facility having (a) at least two incoming streams, b) at least one exit stream and c) at least one inner recycling stream is controlled by adjusting at least one incoming stream amount by means of regulating controls to control the exit stream concentration and/or amount.
    Type: Grant
    Filed: January 22, 2007
    Date of Patent: October 12, 2010
    Assignee: Bayer MaterialScience AG
    Inventors: Jochen Mahrenholtz, Stefan Wershofen, Gerhard Then, Sabine Pegel, Jun Wang, Erman Sevinc, Richard H. Guhl
  • Method and device for determining the isomer composition in isocyanate production processes
    Patent number: 7662634
    Abstract: The invention relates to a method for determining the isomer composition in an isocyanate isomer mixture, wherein a spectrum of the isomer mixture is recorded and the spectrum is entered into a chemometric calibration model.
    Type: Grant
    Filed: May 14, 2004
    Date of Patent: February 16, 2010
    Assignee: Bayer MaterialScience AG
    Inventors: Jochen Mahrenholtz, Andrea Wimschneider, Hans-Georg Pirkl, Heinz-Herbert Müller, Stefan Dresely, Jeffrey Bolton, Martin Schiffhauer, Udo Wolf, Johannes Schweer, Martin Gerlach
  • Process for the production of very pure 2,4?-methylenediphenyl diisocyanate
    Patent number: 7495124
    Abstract: The present invention relates to a process for the production of MDI fractions containing 2,4?-MDI, and in which the 2,2?-MDI component from the MDA production is largely removed from the isomer mixture. Highly reactive monomeric MDI products can be produced in this way. These MDI products are characterised in their processing by significantly reduced emissions of MDI monomers.
    Type: Grant
    Filed: February 1, 2005
    Date of Patent: February 24, 2009
    Assignee: Bayer MaterialScience AG
    Inventors: Hans-Georg Pirkl, Jeffrey Bolton, Walter Meckel, Ulrich Wolf, Matthias Wintermantel, Jochen Mahrenholtz
  • Process for controlling a production process
    Publication number: 20080147208
    Abstract: A production process such as an isocyanate production process, conducted with a production facility having (a) at least two incoming streams, b) at least one exit stream and c) at least one inner recycling stream is controlled by adjusting at least one incoming stream amount by means of regulating controls to control the exit stream concentration and/or amount.
    Type: Application
    Filed: January 22, 2007
    Publication date: June 19, 2008
    Inventors: Jochen Mahrenholtz, Stefan Wershofen, Gerhard Then, Sabine Pegel, Jun Wang, Erman Sevinc, Richard H. Guhl
  • Method and device for determining the isomer composition in isocyanate production processes
    Publication number: 20050003553
    Abstract: The invention relates to a method for determining the isomer composition in an isocyanate isomer mixture, wherein a spectrum of the isomer mixture is recorded and the spectrum is entered into a chemometric calibration model.
    Type: Application
    Filed: May 14, 2004
    Publication date: January 6, 2005
    Inventors: Jochen Mahrenholtz, Andrea Wimschneider, Hans-Georg Pirkl, Heinz-Herbert Muller, Stefan Dresely, Jeffrey Bolton, Martin Schiffhauer, Gdo Wolf, Johannes Schweer, Martin Gerlach
  • Self-cleaning separator for cohesive or adhesive products
    Patent number: 6491167
    Abstract: A self-cleaning separator is described for cohesive or adhesive solids from a fluidborne stream of solids on the basis of a cyclonelike separation. The separator consists at least of a cylindrical upper section (8) having a separating chamber (3), a product inlet (2), a fluid outlet (5), and of a conical lower section (6) having a solids outlet (7) adjoining below the lower section (6), at least the side wall (4) of the upper section (8) being produced from an elastic material, in particular an elastomeric material.
    Type: Grant
    Filed: December 20, 1999
    Date of Patent: December 10, 2002
    Assignee: Bayer Aktiengesellschaft
    Inventors: Jochen Mahrenholtz, Jörg-Rainer Schmitz, Klaus-Michael Zeyen, Oliver Fleschenträger
  • SELF-CLEANING SEPARATOR FOR COHESIVE OR ADHESIVE PRODUCTS
    Publication number: 20020014442
    Abstract: A self-cleaning separator is described for cohesive or adhesive solids from a fluidborne stream of solids on the basis of a cyclonelike separation. The separator consists at least of a cylindrical upper section (8) having a separating chamber (3), a product inlet (2), a fluid outlet (5), and of a conical lower section (6) having a solids outlet (7) adjoining below the lower section (6), at least the side wall (4) of the upper section (8) being produced from an elastic material, in particular an elastomeric material.
    Type: Application
    Filed: December 20, 1999
    Publication date: February 7, 2002
    Inventors: JOCHEN MAHRENHOLTZ, JORG-RAINER SCHMITZ, KLAUS-MICHAEL ZEYEN, OLIVER FLESCHENTRAGER