Patents by Inventor David Harold Bramer

David Harold Bramer 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).

  • Reducing low molecular weight cyclic organosiloxanes in a recirculating process stream
    Patent number: 6180811
    Abstract: A process for continuously reducing the amount of cyclic organosiloxane in a recirculating process stream. The process comprises washing a process stream in a wash step to reduce chloride content of the process stream, distilling the process stream into a low-boiling fraction comprising low molecular weight cyclic organosiloxanes and an inert solvent and a high-boiling fraction comprising linear organosiloxanes and high molecular weight cyclic organosiloxanes, and reequilibrating the overhead low-boiling fraction in the presence of a reequilibration catalyst to form a reequilibration mixture comprising high molecular weight cyclic organosiloxanes and the inert solvent, and recycling the reequilibration mixture to the wash step.
    Type: Grant
    Filed: December 22, 1998
    Date of Patent: January 30, 2001
    Assignee: Dow Corning Corporation
    Inventors: David Harold Bramer, Larry Herbert Wood