Patents by Inventor Daniel Lewis Longhurst

Daniel Lewis Longhurst 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).

  • Separation of hydrogen-hydrocarbon gas mixtures using closed-loop gas expander refrigeration
    Patent number: 6560989
    Abstract: A method for the recovery of hydrogen and one or more hydrocarbons having one or more carbon atoms from a feed gas containing hydrogen and the one or more hydrocarbons, which process comprises cooling and partially condensing the feed gas to provide a partially condensed feed; separating the partially condensed feed to provide a first liquid stream enriched in the one or more hydrocarbons and a first vapor stream enriched in hydrogen; further cooling and partially condensing the first vapor stream to provide an intermediate two-phase stream; and separating the intermediate two-phase stream to yield a further-enriched hydrogen stream and a hydrogen-depleted residual hydrocarbon stream. Some or all of the cooling is provided by indirect heat exchange with cold gas refrigerant generated in a closed-loop gas expander refrigeration cycle.
    Type: Grant
    Filed: June 7, 2002
    Date of Patent: May 13, 2003
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Mark Julian Roberts, Christopher Francis Harris, Christopher Michael Ott, Howard Charles Rowles, Daniel Lewis Longhurst, Brian Alfred McNeil