Patents by Inventor Claus Riehle

Claus Riehle 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 monitoring and controlling nitrating processes with the aid of an online spectrometer
    Patent number: 7227147
    Abstract: A process for monitoring and/or controlling a nitrating process, having the following steps: measuring inline infrared spectra of nitric acid content in a reaction mixture stream downstream of the nitration reaction, preferably near-infrared spectra, evaluating the measured spectra by means of a computer-assisted, matrix-specific calibration model for the purpose of determining the content of nitric acid, transmitting the results of spectrometric examination to a process control system, inputting the results of spectrometric examination for the purpose of specifying the content of nitric acid in the acid phase into a regulator (224) for control of the metering (207,217) of nitric acid into a nitrating reactor.
    Type: Grant
    Filed: February 2, 2004
    Date of Patent: June 5, 2007
    Assignee: Bayer MaterialScience AG
    Inventors: Claus Riehle, Marcus Brand, Frank Hilgers, Klaus Jäger, Rainer Giesen, Heinz-Josef Hamacher, Udo Wolf
  • Process for monitoring and controlling nitrating processes with the aid of an online spectrometer
    Publication number: 20040164247
    Abstract: A process for monitoring and/or controlling a nitrating process, having the following steps:
    Type: Application
    Filed: February 2, 2004
    Publication date: August 26, 2004
    Inventors: Claus Riehle, Marcus Brand, Frank Hilgers, Klaus Jager, Rainer Giesen, Heinz-Josef Hamacher, Udo Wolf
  • Gas-phase polymerization in a bell-shaped reactor
    Patent number: 6441108
    Abstract: The present invention relates to a process for the continuous discharge of pre-classified polymer particles, particularly rubber particles, from a gas phase polymerization reactor, comprising the steps of classifying the polymer in a classifier, discharging the particles with a sufficient size and conveying the undersized particles back into the gas phase polymerization reactor.
    Type: Grant
    Filed: April 6, 2000
    Date of Patent: August 27, 2002
    Assignee: Bayer Aktiengesellschaft
    Inventors: Friedrich Haendeler, Heiko Herold, Leslaw Mleczko, Claus Riehle, Franz-Josef Mersmann, Jürgen Schneider, Michael Dauben