Patents by Inventor Brian Hokkanen

Brian Hokkanen 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).

  • Publication number: 20230203271
    Abstract: A polymer composition containing a thermoplastic polymer and an electromagnetic interference filler is provided. At a thickness of 3.2 millimeters and over a frequency range from 2 GHz to 18 GHz, the composition may exhibit an average absorbency of about 25% or greater and an average electromagnetic interference shielding effectiveness of about 40 decibels or more, as determined in accordance with ASTM D4935-18.
    Type: Application
    Filed: December 21, 2022
    Publication date: June 29, 2023
    Inventors: Yuehua Yu, Joseph Grenci, Brian Hokkanen, Darin Grinsteinner, Jun Luo, Prabuddha Bansal
  • Publication number: 20140142349
    Abstract: The present invention relates to a process for producing ethanol by methyl acetate hydrogenolysis. The process comprises the step of reacting carbon monoxide and methanol in a reaction medium to form a reaction solution that comprises acetic acid and from 0.5 to 25 wt. % methyl acetate. The process further comprises the step of esterifying the acetic acid and feeding the methyl acetate to a distillation column to remove alkyl halides. The process further comprises the steps of reacting the methyl acetate stream that does not contain alkyl halides and hydrogen in the presence of a second catalyst to form an alcohol product that comprises ethanol and/or methanol.
    Type: Application
    Filed: November 20, 2012
    Publication date: May 22, 2014
    Applicant: CELANESE INTERNATIONAL CORPORATION
    Inventors: Andrew Shuff, G. Paull Torrence, Brian Hokkanen, Tianshu Pan, Mark O. Scates, Ronald D. Shaver
  • Patent number: 8729318
    Abstract: The present invention relates to a process for producing ethanol by methyl acetate hydrogenolysis. The process comprises the step of reacting carbon monoxide and methanol in a reaction medium to form a reaction solution that comprises acetic acid and from 0.5 to 25 wt. % methyl acetate. The process further comprises the step of esterifying the acetic acid and feeding the methyl acetate to a distillation column to remove alkyl halides. The process further comprises the steps of reacting the methyl acetate stream that does not contain alkyl halides and hydrogen in the presence of a second catalyst to form an alcohol product that comprises ethanol and/or methanol.
    Type: Grant
    Filed: November 20, 2012
    Date of Patent: May 20, 2014
    Assignee: Celanese International Corporation
    Inventors: Andrew Shuff, G. Paull Torrence, Brian Hokkanen, Tianshu Pan, Mark O. Scates, Ronald D. Shaver
  • Patent number: 8697908
    Abstract: A process for removing amine compounds from a process stream derived from a carbonylation process. The amine compounds may be present as iodide salts. The process stream also contains corrosion metal contaminants. The amine compounds are removed by mixing a portion of the process stream a slipstream to form an aqueous stream having a water concentration of greater than 50 wt. %. The aqueous stream is contacted with an exchange resin to remove amine compounds, as well as corrosion metal contaminants.
    Type: Grant
    Filed: May 5, 2011
    Date of Patent: April 15, 2014
    Assignee: Celanese International Corporation
    Inventors: G. Paull Torrence, Brian Hokkanen, Yaw-Hwa Liu
  • Publication number: 20120283471
    Abstract: A process for removing amine compounds from a process stream derived from a carbonylation process. The amine compounds may be present as iodide salts. The process stream also contains corrosion metal contaminants. The amine compounds are removed by mixing a portion of the process stream a slipstream to form an aqueous stream having a water concentration of greater than 50 wt. %. The aqueous stream is contacted with an exchange resin to remove amine compounds, as well as corrosion metal contaminants.
    Type: Application
    Filed: May 5, 2011
    Publication date: November 8, 2012
    Applicant: CELANESE INTERNATIONAL CORPORATION
    Inventors: G. Paull Torrence, Brian Hokkanen, Yaw-Hwa Liu