Patents by Inventor Wolfgang Ruehenbeck

Wolfgang Ruehenbeck 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).

  • Heating a fixed-bed charge in a tube reactor, and an arrangement for carrying out the method
    Patent number: 4576573
    Abstract: A fixed-bed charge in a tube reactor is heated, and at the same time heat is conducted away from, or into, the fixed bed, by a method in which the fixed bed is heated by means of a fluidized material which conducts away and supplies heat and flows through the voids in the charge, and the heat is conducted away or supplied by means of a heat-transfer medium flowing in a heat exchanger, the latter being located in the fixed bed or in a fluidized layer formed above the fixed bed and consisting of the fluidized material.
    Type: Grant
    Filed: December 23, 1983
    Date of Patent: March 18, 1986
    Assignee: BASF Aktiengesellschaft
    Inventor: Wolfgang Ruehenbeck
  • Preparation of ammonium carbamate
    Patent number: 4567294
    Abstract: In the preparation of ammonium carbamate by reacting ammonia with carbon dioxide, the reactants are introduced into a layer of ammonium carbamate which is kept in the fluidized state by gaseous ammonia or carbon dioxide. The temperature is kept below 25.degree. C. by removing the heat of reaction.
    Type: Grant
    Filed: December 20, 1984
    Date of Patent: January 28, 1986
    Assignee: BASF Aktiengesellschaft
    Inventors: Manfred Dressel, Heinrich Eberle, Willi Ripperger, Wolfgang Ruehenbeck, Werner Zwick
  • Manufacture of o-benzyltoluenes
    Patent number: 4117019
    Abstract: A process for the manufacture of o-benzyltoluenes by reaction of o-xylyl halides with benzenes in the presence of sulfuric acid or in the presence of phosphoric acid and adjuvants or in the presence of sulfuric acid and adjuvants. The products are starting materials for the manufacture of anthracene and anthraquinone and their derivatives.
    Type: Grant
    Filed: February 14, 1975
    Date of Patent: September 26, 1978
    Assignee: BASF Aktiengesellschaft
    Inventors: Heinz Eilingsfeld, Manfred Patsch, Karl-Gerhard Baur, Wolfgang Ruehenbeck