Patents by Inventor Robert E. Marshall,, IV

Robert E. Marshall,, IV 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).

  • System for closed loop dehydration of a mercury removal unit
    Patent number: 10537844
    Abstract: Disclosed is a system in which saturated mercury adsorbent in a gas mercury removal unit is dehydrated in a LNG, LPG or cryogenic gas plant using a regeneration gas stream. Spent regeneration gas stream is then condensed and the water is removed therefrom to form a renewed regeneration gas stream in a closed loop. The regeneration gas stream is compressed and recycled to a location in the plant upstream of an acid gas removal unit or upstream of a regeneration gas dehydration unit such that the regeneration gas stream is not sent to a flare. A dehydration unit having a pair of dehydration vessels, arranged in parallel, alternating between absorption and regeneration modes, receives gas from the compressor. Conventional plants can be retrofitted to achieve improved process efficiencies, cost savings and environmental benefits.
    Type: Grant
    Filed: September 6, 2019
    Date of Patent: January 21, 2020
    Assignee: CHEVRON U.S.A. INC.
    Inventors: Robert E. Marshall, IV, Saham Sam Tafreshi
  • SYSTEM FOR CLOSED LOOP DEHYDRATION OF A MERCURY REMOVAL UNIT
    Publication number: 20190388826
    Abstract: Disclosed is a system in which saturated mercury adsorbent in a gas mercury removal unit is dehydrated in a LNG, LPG or cryogenic gas plant using a regeneration gas stream. Spent regeneration gas stream is then condensed and the water is removed therefrom to form a renewed regeneration gas stream in a closed loop. The regeneration gas stream is compressed and recycled to a location in the plant upstream of an acid gas removal unit or upstream of a regeneration gas dehydration unit such that the regeneration gas stream is not sent to a flare. A dehydration unit having a pair of dehydration vessels, arranged in parallel, alternating between absorption and regeneration modes, receives gas from the compressor. Conventional plants can be retrofitted to achieve improved process efficiencies, cost savings and environmental benefits.
    Type: Application
    Filed: September 6, 2019
    Publication date: December 26, 2019
    Inventors: Robert E. MARSHALL, IV, Saham Sam TAFRESHI
  • Systems and methods for closed loop dehydration of a mercury removal unit
    Patent number: 10486099
    Abstract: Saturated mercury adsorbent in a gas mercury removal unit is dehydrated in a LNG, LPG or cryogenic gas plant using a regeneration gas stream. Spent regeneration gas stream is then condensed and the water is removed therefrom to form a renewed regeneration gas stream in a closed loop. The regeneration gas stream is compressed and recycled to a location in the plant upstream of an acid gas removal unit or upstream of a regeneration gas dehydration unit such that the regeneration gas stream is not sent to a flare. Conventional plants can be retrofitted to achieve improved process efficiencies, cost savings and environmental benefits.
    Type: Grant
    Filed: December 28, 2017
    Date of Patent: November 26, 2019
    Assignee: CHEVRON U.S.A. INC.
    Inventors: Robert E. Marshall, IV, Saham Sam Tafreshi
  • SYSTEMS AND METHODS FOR CLOSED LOOP DEHYDRATION OF A MERCURY REMOVAL UNIT
    Publication number: 20190201834
    Abstract: Saturated mercury adsorbent in a gas mercury removal unit is dehydrated in a LNG, LPG or cryogenic gas plant using a regeneration gas stream. Spent regeneration gas stream is then condensed and the water is removed therefrom to form a renewed regeneration gas stream in a closed loop. The regeneration gas stream is compressed and recycled to a location in the plant upstream of an acid gas removal unit or upstream of a regeneration gas dehydration unit such that the regeneration gas stream is not sent to a flare. Conventional plants can be retrofitted to achieve improved process efficiencies, cost savings and environmental benefits.
    Type: Application
    Filed: December 28, 2017
    Publication date: July 4, 2019
    Inventors: Robert E. Marshall,, IV, Saham Sam Tafreshi