Patents by Inventor Johannes LEONHÄUSER

Johannes LEONHÄUSER 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).

  • Method for processing hydrogen chloride from isocyanate preparation
    Patent number: 10307727
    Abstract: A method for processing hydrogen chloride from isocyanate preparation comprises the steps: a) providing hydrogen chloride; b) purifying the hydrogen chloride provided; and furthermore step c) or step d): c) bringing the purified hydrogen chloride into contact with water and/or with hydrochloric acid which is not saturated with respect to uptake of hydrogen chloride, d) further processing the purified hydrogen chloride to chlorine by partial oxidation. The hydrogen chloride provided in step a) contains organic and/or nitrogen-containing impurities and in step b) the purification is carried out by bringing hydrogen chloride into contact with hydrochloric acid which is saturated to the extent of ?90% with respect to uptake of hydrogen chloride at least in a first gas scrubber (10) and circulating this hydrochloric acid at least partially through the first gas scrubber (10).
    Type: Grant
    Filed: May 27, 2015
    Date of Patent: June 4, 2019
    Assignee: COVESTRO DEUTSCHLAND AG
    Inventors: Ralph Weber, Martin Ehrig, Johannes Leonhäuser, Dirk Weiβenberg
  • Micro-plate electrode cell and use thereof
    Patent number: 9512017
    Abstract: The invention relates to an electrolysis cell for the particularly efficient treatment of wastewater polluted with organic substances by electrooxidative degradation of the wastewater constituents contributing to the chemical oxygen demand, and also its use.
    Type: Grant
    Filed: February 24, 2014
    Date of Patent: December 6, 2016
    Assignees: Bayer Aktiengesellschaft, Bayer Cropscience Aktiengesellschaft
    Inventors: Jens Aβmann, Johannes Leonhäuser, Ivonne Görtz, Christian Rämsch, Frank Herbstritt
  • MICRO-PLATE ELECTRODE CELL AND USE THEREOF
    Publication number: 20160009575
    Abstract: The invention relates to an electrolysis cell for the particularly efficient treatment of wastewater polluted with organic substances by electrooxidative degradation of the wastewater constituents contributing to the chemical oxygen demand, and also its use.
    Type: Application
    Filed: February 24, 2014
    Publication date: January 14, 2016
    Applicants: BAYER CROPSCIENCE AKTIENGESELLSCHAFT, BAYER TECHNOLOGY SERVICES GMBH
    Inventors: Jens AßMANN, Johannes LEONHÄUSER, Ivonne GÖRTZ, Christian RÄMSCH, Frank HERBSTRITT
  • METHOD FOR PROCESSING HYDROGEN CHLORIDE FROM ISOCYANATE PREPARATION
    Publication number: 20150343414
    Abstract: A method for processing hydrogen chloride from isocyanate preparation comprises the steps: a) providing hydrogen chloride; b) purifying the hydrogen chloride provided; and furthermore step c) or step d): c) bringing the purified hydrogen chloride into contact with water and/or with hydrochloric acid which is not saturated with respect to uptake of hydrogen chloride d) further processing the purified hydrogen chloride to chlorine by partial oxidation The hydrogen chloride provided in step a) contains organic and/or nitrogen-containing impurities and in step b) the purification is carried out by bringing hydrogen chloride into contact with hydrochloric acid which is saturated to the extent of 90% with respect to uptake of hydrogen chloride at least in a first gas scrubber (10) and circulating this hydrochloric acid at least partially through the first gas scrubber (10).
    Type: Application
    Filed: May 27, 2015
    Publication date: December 3, 2015
    Inventors: Ralph WEBER, Martin EHRIG, Johannes LEONHÄUSER, Dirk WEIßENBERG