Patents by Inventor Edward Landis Weist, Jr.

Edward Landis Weist, Jr. 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).

  • Patent number: 6483001
    Abstract: The present invention describes a pressure swing adsorption (PSA) apparatus and process for the production of purified hydrogen from a feed gas stream containing heavy hydrocarbons (i.e., hydrocarbons having at least six carbons). The apparatus comprises at least one bed containing at least three layers. The layered adsorption zone contains a feed end with a low surface area adsorbent (20 to 400 m2/g) which comprises 2 to 20% of the total bed length followed by a layer of an intermediate surface area adsorbent (425 to 800 m2/g) which comprises 25 to 40 % of the total bed length and a final layer of high surface area adsorbent (825 to 2000 m2/g) which comprises 40 to 78% of the total bed length.
    Type: Grant
    Filed: December 22, 2000
    Date of Patent: November 19, 2002
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Timothy Christopher Golden, Edward Landis Weist, Jr
  • Patent number: 6454838
    Abstract: A pressure swing adsorption process includes providing a pressure swing adsorption apparatus having six beds, and equalizing a pressure of each of the six beds in four steps, wherein at all times during the process, at least one of the six beds is providing offgas. The process is particularly suitable for purifying hydrogen from a feed gas mixture containing hydrogen and at least one of methane, carbon dioxide, carbon monoxide, nitrogen and water vapor.
    Type: Grant
    Filed: June 21, 2000
    Date of Patent: September 24, 2002
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Jianguo Xu, Edward Landis Weist, Jr.
  • Patent number: 6302943
    Abstract: An improved adsorption process is provided for purifying hydrogen from a feed gas mixture including hydrogen and at least one impurity selected from the group consisting of carbon monoxide and nitrogen. The process includes providing an adsorption apparatus having a discharge end adsorption layer containing an adsorbent with a Henry's law constant (KH) at 70° F. for the impurity from about 0.5 to about 2.4 mmole/g/atm. The product gas collected from the adsorption apparatus is high purity (99.99+%) hydrogen.
    Type: Grant
    Filed: November 2, 1999
    Date of Patent: October 16, 2001
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Leighta Maureen Johnson, Thomas Stephen Farris, Timothy Christopher Golden, Edward Landis Weist, Jr., James Michael Occhialini
  • Patent number: 5846298
    Abstract: Ozone is recovered from an ozone-oxygen mixture by adsorption using an adsorbent which comprises a zeolite selected from the group consisting of L type zeolite, Y type zeolite, ZSM-5, and mordenite in which at least 90% of the exchangeable cation content is in the ammonium form and the molar ratio of potassium to aluminum is less than about 0.25. Alternatively, a proton-exchanged L type zeolite can be used in which at least 90% of the exchangeable cation content is in the proton form and the molar ratio of potassium to aluminum is less than about 0.25.
    Type: Grant
    Filed: May 9, 1997
    Date of Patent: December 8, 1998
    Assignee: Air Products and Chemicals, Inc.
    Inventor: Edward Landis Weist, Jr.