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).
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Patent number: 12102958Abstract: 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: GrantFiled: September 2, 2022Date of Patent: October 1, 2024Assignee: INEOS Americas, LLCInventors: Ulises I. Cruz, Erik J. Stewart, Rodrigo Zamora
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Publication number: 20230106908Abstract: 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: ApplicationFiled: September 2, 2022Publication date: April 6, 2023Applicant: Ineos Americas, LLCInventors: Ulises I. Cruz, Erik J. Stewart, Rodrigo Zamora
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Patent number: 11433347Abstract: 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: GrantFiled: May 11, 2020Date of Patent: September 6, 2022Assignee: INEOS Americas, LLCInventors: Ulises I. Cruz, Erik J. Stewart, Rodrigo Zamora
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Publication number: 20200376427Abstract: 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: ApplicationFiled: May 11, 2020Publication date: December 3, 2020Applicant: Ineos Americas, LLCInventors: Ulises I. Cruz, Erik J. Stewart, Rodrigo Zamora
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Patent number: 10646818Abstract: 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: GrantFiled: July 5, 2017Date of Patent: May 12, 2020Assignee: INEOS Americas, LLCInventors: Ulises I. Cruz, Erik J. Stewart, Rodrigo Zamora
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Publication number: 20180015409Abstract: 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: ApplicationFiled: July 5, 2017Publication date: January 18, 2018Applicant: Ineos Americas, LLCInventors: Ulises I. Cruz, Erik J. Stewart, Rodrigo Zamora
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Patent number: 6048513Abstract: 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: GrantFiled: January 10, 1997Date of Patent: April 11, 2000Assignee: The Dow Chemical CompanyInventors: George J. Quarderer, David L. Trent, Erik J. Stewart, Danil Tirtowidjojo, Anil J. Mehta, Cheryl A. Tirtowidjojo
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Patent number: 5532389Abstract: 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: GrantFiled: September 9, 1994Date of Patent: July 2, 1996Assignee: The Dow Chemical CompanyInventors: 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