Patents by Inventor John H. Hollenbach

John H. Hollenbach 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).

  • Membrane and process for the recovery of acid
    Patent number: 7976710
    Abstract: A cross-linked polyvinyl sulfate, copolymer of polyvinyl sulfate and polyvinyl alcohol, or Nafion® membrane is used for recovering sulfuric acid from a feed mixture comprising predominantly acid and water under reverse osmosis conditions wherein sulfuric acid is enriched in the retentate stream and water is removed in the permeate stream.
    Type: Grant
    Filed: March 7, 2006
    Date of Patent: July 12, 2011
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Bhupender S. Minhas, Ramon A. Strauss, Tomas R. Melli, John H. Hollenbach
  • Process for separating a heavy oil feedstream into improved products
    Patent number: 7897828
    Abstract: This invention relates to a process for separating a heavy hydrocarbon stream to produce at least one permeate product stream and at least one retentate product stream. The process utilizes an ultrafiltration process to designed to maximize the quality of the permeate and retenate product streams as well as process embodiments which improve permeate production quantities as well as improve the quality of the product streams obtained by the separations process. In preferred embodiments, the process includes configuration and operational parameters to maximize permeate yield and selectivity.
    Type: Grant
    Filed: October 30, 2007
    Date of Patent: March 1, 2011
    Assignee: ExxonMobile Research and Engineering Company
    Inventors: Kirk C. Nadler, Daniel P. Leta, Halou Oumar-Mahamat, Edward W. Corcoran, Stephen H. Brown, Eric B. Sirota, John H. Hollenbach, Anjaneya S. Kovvali
  • Process for separating a heavy oil feedstream into improved products
    Publication number: 20090062590
    Abstract: This invention relates to a process for separating a heavy hydrocarbon stream to produce at least one permeate product stream and at least one retentate product stream. The process utilizes an ultrafiltration process to designed to maximize the quality of the permeate and retenate product streams as well as process embodiments which improve permeate production quantities as well as improve the quality of the product streams obtained by the separations process. In preferred embodiments, the process includes configuration and operational parameters to maximize permeate yield and selectivity.
    Type: Application
    Filed: October 30, 2007
    Publication date: March 5, 2009
    Inventors: Kirk C. Nadler, Daniel P. Leta, Halou Oumar-Mahamat, Edward W. Corcoran, Stephen H. Brown, Eric B. Sirota, John H. Hollenbach, Anjaneya S. Kovvali