Patents by Inventor Joachim Diefenbach

Joachim Diefenbach 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 REMOVING BORON-CONTAINING IMPURITIES FROM HALOGEN SILANES AND APPARATUS FOR PERFORMING SAID METHOD
    Publication number: 20110150739
    Abstract: The invention relates to a method for reducing the content of boron-containing compounds in compositions I comprising at least one silicon halide, especially of chlorosilanes of the type HnSiCI4-n with n being equal to 0, 1, 2 or 3, by introducing a small amount of moisture into the composition I in a first step and separating the hydrolyzed boron- and/or silicon-containing compounds in a second step in such a way that a pre-purified composition II having a reduced boron content is obtained, wherein, in particular, the first and second steps can be run in at least one or more cycles. Also claimed is an apparatus for performing the method and an overall system into which this apparatus is integrated.
    Type: Application
    Filed: April 23, 2009
    Publication date: June 23, 2011
    Applicant: Evonik Degussa GmbH
    Inventors: Beate Seliger, Norbert Schladerbeck, Ingo Pauli, Andre Mecklenburg, Reinhold Schork, Hartwig Rauleder, Frank Kropfgans, Joachim Diefenbach