Patents by Inventor Walter Boerner

Walter Boerner 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 of producing cyanuric chloride
    Patent number: 6838070
    Abstract: The invention relates to a method of producing cyanuric chloride by trimerizing chlorocyan at a temperature of at least 250° C. on washed activated carbon as the catalyst. The service life of the catalyst can be improved by using an activated coal with an effective pore volume V eff of equal or greater 0.17 ml/g, with V eff being the result of pores with a pore diameter ranging from 0.5 to 7 nm.
    Type: Grant
    Filed: March 8, 2000
    Date of Patent: January 4, 2005
    Assignee: Degussa AG
    Inventors: Walter Boerner, Ralph Marquardt, Stephanie Schauhoff, Christine Schick, Rudolf Vanheertum
  • Method of producing acetone-cyanhydrin
    Patent number: 6417385
    Abstract: Acetone-cyanhydrin can be produced in a gas-liquid reactor from a hydrogen cyanide-containing gas, especially the crude gas originating from a methane-ammonia (BMA) or Andrussow process, and acetone in the presence of a base. The aim of the invention is to overcome the disadvantages of the methods for producing acetone-cyanhydrin known from the art. To this end, the gaseous phase removed from the reactor is liberated from the unreacted acetone and hydrogen cyanide in a gas purifier that is operated with a high-boiling solvent, especially with stabilized acetone-cyanhydrin, and the washed phase is fed to the gas-liquid reactor.
    Type: Grant
    Filed: December 28, 2001
    Date of Patent: July 9, 2002
    Assignee: Degussa AG
    Inventors: Walter Börner, Liane Deusser, Ralph Marquardt, Rudolf Vanheertum, Karl-Heinz Vieweg