Patents by Inventor Christian Michalik

Christian Michalik 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 preparing phenol and acetone by acid-catalyzed cleavage of cumene hydroperoxide
    Patent number: 6307112
    Abstract: Phenol and acetone are prepared by a process comprising homogeneously cleaving cumene hydroperoxide in the presence of acid catalyst in a cleavage apparatus comprising at least one reactor having plug flow characteristics thereby producing a cleavage product; recycling some of the cleavage product stream by combining the recycled cleavage product stream with the cumene hydroperoxide-containing feed stream fed to said cleavage apparatus under the condition that the mass flow ratio of the recycled partial cleavage product stream to the cumene hydroperoxide-containing feed stream sent to the cleavage reactor is less than 10.
    Type: Grant
    Filed: December 20, 1999
    Date of Patent: October 23, 2001
    Assignee: Phenolchemie GmbH & Co. KG
    Inventors: Manfred Weber, Otto Gerlich, Michael Kleine-Boymann, Werner Pompetzki, Reinhard Sigg, Christian Michalik, Jürgen Volke
  • Process for the production of phenol and acetone from cumene
    Patent number: 6225513
    Abstract: The present invention relates to an improved method for producing phenol and acetone by oxidizing cumene into technical cumol hydroperoxide (CHP) through catalytic cleavage of the CHP. According to the invention, the oxidation products are concentrated to up to a cumene content ranging from 21 to 30 wt % in the technical cumol hydroperoxide, said mixture being used for the catalytic cleavage.
    Type: Grant
    Filed: September 15, 1999
    Date of Patent: May 1, 2001
    Assignees: Illa International Ltd., Phenolchemie GmbH & Co. Kg
    Inventors: Vladimir Michailovitch Zakoshansky, Irina Ivanova Vasilieva, Andrei Konstantinovitch Griaznov, Youry Nikolaevitch Youriev, Heinrich Van Barnefeld, Otto Gerlich, Michael Kleine-Boymann, Werner Kleinloh, Christian Michalik