Patents by Inventor Erik J. Stewart

Erik J. Stewart 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: 20230106908
    Abstract: A method and apparatus for continuously treating acid gases including recovering absorbent chemicals by introducing streams leaving a regenerator and/or leaving an absorber into a static mixing zone wherein supplemental washing water is added to recover absorbent chemicals. Improvements to the prior art methods are provided where one or more absorbent chemical recovery units are included to increase the amount of recovered absorbent chemicals exiting the regenerator and/or exiting the absorber are increased and/or maximized. Absorbent chemical recovery units can include mixing units where liquid is added to the stream of sour gas and absorbent chemical to mix with and absorb the absorbent chemical from the stream.
    Type: Application
    Filed: September 2, 2022
    Publication date: April 6, 2023
    Applicant: Ineos Americas, LLC
    Inventors: Ulises I. Cruz, Erik J. Stewart, Rodrigo Zamora
  • Patent number: 11433347
    Abstract: A method and apparatus for continuously treating acid gases including recovering absorbent chemicals by introducing streams leaving a regenerator and/or leaving an absorber into a static mixing zone wherein supplemental washing water is added to recover absorbent chemicals. Improvements to the prior art methods are provided where one or more absorbent chemical recovery units are included to increase the amount of recovered absorbent chemicals exiting the regenerator and/or exiting the absorber are increased and/or maximized. Absorbent chemical recovery units can include mixing units where liquid is added to the stream of sour gas and absorbent chemical to mix with and absorb the absorbent chemical from the stream.
    Type: Grant
    Filed: May 11, 2020
    Date of Patent: September 6, 2022
    Assignee: INEOS Americas, LLC
    Inventors: Ulises I. Cruz, Erik J. Stewart, Rodrigo Zamora
  • Publication number: 20200376427
    Abstract: A method and apparatus for continuously treating acid gases including recovering absorbent chemicals by introducing streams leaving a regenerator and/or leaving an absorber into a static mixing zone wherein supplemental washing water is added to recover absorbent chemicals. Improvements to the prior art methods are provided where one or more absorbent chemical recovery units are included to increase the amount of recovered absorbent chemicals exiting the regenerator and/or exiting the absorber are increased and/or maximized. Absorbent chemical recovery units can include mixing units where liquid is added to the stream of sour gas and absorbent chemical to mix with and absorb the absorbent chemical from the stream.
    Type: Application
    Filed: May 11, 2020
    Publication date: December 3, 2020
    Applicant: Ineos Americas, LLC
    Inventors: Ulises I. Cruz, Erik J. Stewart, Rodrigo Zamora
  • Patent number: 10646818
    Abstract: A method and apparatus for continuously treating acid gases including recovering absorbent chemicals by introducing streams leaving a regenerator and/or leaving an absorber into a static mixing zone wherein supplemental washing water is added to recover absorbent chemicals. Improvements to the prior art methods are provided where one or more absorbent chemical recovery units are included to increase the amount of recovered absorbent chemicals exiting the regenerator and/or exiting the absorber are increased and/or maximized. Absorbent chemical recovery units can include mixing units where liquid is added to the stream of sour gas and absorbent chemical to mix with and absorb the absorbent chemical from the stream.
    Type: Grant
    Filed: July 5, 2017
    Date of Patent: May 12, 2020
    Assignee: INEOS Americas, LLC
    Inventors: Ulises I. Cruz, Erik J. Stewart, Rodrigo Zamora
  • Publication number: 20180015409
    Abstract: A method and apparatus for continuously treating acid gases including recovering absorbent chemicals by introducing streams leaving a regenerator and/or leaving an absorber into a static mixing zone wherein supplemental washing water is added to recover absorbent chemicals. Improvements to the prior art methods are provided where one or more absorbent chemical recovery units are included to increase the amount of recovered absorbent chemicals exiting the regenerator and/or exiting the absorber are increased and/or maximized. Absorbent chemical recovery units can include mixing units where liquid is added to the stream of sour gas and absorbent chemical to mix with and absorb the absorbent chemical from the stream.
    Type: Application
    Filed: July 5, 2017
    Publication date: January 18, 2018
    Applicant: Ineos Americas, LLC
    Inventors: Ulises I. Cruz, Erik J. Stewart, Rodrigo Zamora
  • Patent number: 6048513
    Abstract: This invention is a method for forming hypohalous acid in a mass transfer device. The method comprises: (1) feeding into the device a stream of caustic solution comprising at least one alkali or alkaline earth metal of a hydroxide, oxide, hypohalite, bicarbonate, or carbonate; (2) feeding a stream comprising halogen gas into the device; (3) reacting at least some of the halogen gas with the caustic solution to form a solution containing hypohalous acid; (4) desorbing the hypohalous acid from the solution and into the stream of halogen gas; and (5) removing the stream of halogen gas from the device. In this method, the mass transfer device comprises a porous rotor which is permeable to the streams, and is rotated about an axis such that the streams flow through the rotor and the stream of caustic solution flows radially outward from the axis.
    Type: Grant
    Filed: January 10, 1997
    Date of Patent: April 11, 2000
    Assignee: The Dow Chemical Company
    Inventors: George J. Quarderer, David L. Trent, Erik J. Stewart, Danil Tirtowidjojo, Anil J. Mehta, Cheryl A. Tirtowidjojo
  • Patent number: 5532389
    Abstract: A process of preparing alkylene oxides comprises steps of: (1) optionally forming a hypochlorite solution; (2) contacting chlorine with a solution of a hypochlorite below about 60.degree. C., and a pH of less than about 5.5, with sufficient micromixing to achieve a product hypochlorous acid in a yield of at least about 80 percent; (3) separating at least a portion the hypochlorous acid from an aqueous metal chloride solution wherein the solution is sprayed as droplets; (4) distilling the remaining liquid phase; (5) absorbing the hypochlorous acid and dichlorine monoxide in low-chlorides water to produce a low-chlorides aqueous hypochlorous acid solution; (6) contacting the low-chlorides aqueous hypochlorous acid solution with an olefin in a continuous process to form a olefin chlorohydrin; (7) optionally contacting the olefin chlorohydrin with a base to form a alkylene oxide and a salt solution; and (8) optionally separating the alkylene oxide from the salt solution.
    Type: Grant
    Filed: September 9, 1994
    Date of Patent: July 2, 1996
    Assignee: The Dow Chemical Company
    Inventors: David L. Trent, George J. Quarderer, Kim G. Bargeron, Douglas C. Greminger, David J. Koranek, Erik J. Stewart, Curtis N. Swisher, Cheryl A. Tirtowidjojo, Danil Tirtowidjojo