Patents by Inventor Stephen R. Caskey

Stephen R. Caskey 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).

  • Enhancement of reduction resistance for manganese oxide adsorbents
    Patent number: 11938459
    Abstract: Processes for removing arsenic compounds from a feed stream using an adsorbent in disclosed. The process includes contacting a feed stream comprising at least arsenic and sulfur compounds with an adsorbent comprising an low-crystallinity manganese oxide, at least one halide and a binder, to provide a treated effluent substantially free of the arsenic and sulfur compounds.
    Type: Grant
    Filed: April 13, 2021
    Date of Patent: March 26, 2024
    Assignee: UOP LLC
    Inventors: Stephen R. Caskey, Michael B. Hamoy
  • ENHANCEMENT OF REDUCTION RESISTANCE FOR MANGANESE OXIDE ADSORBENTS
    Publication number: 20210229065
    Abstract: Processes for removing arsenic compounds from a feed stream using an adsorbent in disclosed. The process includes contacting a feed stream comprising at least arsenic and sulfur compounds with an adsorbent comprising an low-crystallinity manganese oxide, at least one halide and a binder, to provide a treated effluent substantially free of the arsenic and sulfur compounds.
    Type: Application
    Filed: April 13, 2021
    Publication date: July 29, 2021
    Inventors: Stephen R. Caskey, Michael B. Hamoy
  • Enhancement of reduction resistance for manganese oxide adsorbents
    Patent number: 11000821
    Abstract: Processes for removing arsenic compounds from a feed stream using an adsorbent in disclosed. The process includes contacting a feed stream comprising at least arsenic and sulfur compounds with an adsorbent comprising an low-crystallinity manganese oxide, at least one halide and a binder, to provide a treated effluent substantially free of the arsenic and sulfur compounds.
    Type: Grant
    Filed: November 30, 2018
    Date of Patent: May 11, 2021
    Assignee: UOP LLC
    Inventors: Stephen R. Caskey, Michael B. Hamoy
  • Adsorbent for contaminant removal from C4 hydrocarbons
    Patent number: 10744492
    Abstract: A process is provided for removing contaminants from olefin containing C4 streams. The streams are contacted with an X based zeolite adsorbent comprising greater than 88% X zeolite at a SiO2/Al2O3 ratio of less than 2.5 and an alkali metal salt present in excess of an amount required to achieve full exchange of cation sites on the X based zeolite. The resulting alkali oxide on a volatile free basis is less than 1% (by mass) of the X based adsorbent. The contaminants that are removed include sulfur, oxygenate, and nitrogen based contaminants.
    Type: Grant
    Filed: November 3, 2017
    Date of Patent: August 18, 2020
    Assignee: UOP LLC
    Inventors: Stephen R. Caskey, Munish Kumar Sharma, Jayant K. Gorawara, Pijus Kanti Roy, Frank S. Modica
  • ADSORBENT FOR CONTAMINANT REMOVAL FROM C4 HYDROCARBONS
    Publication number: 20200023341
    Abstract: A process is provided for removing contaminants from olefin containing C4 streams. The streams are contacted with an X based zeolite adsorbent comprising greater than 88% X zeolite at a SiO2/Al2O3 ratio of less than 2.5 and an alkali metal salt present in excess of an amount required to achieve full exchange of cation sites on the X based zeolite. The resulting alkali oxide on a volatile free basis is less than 1% (by mass) of the X based adsorbent. The contaminants that are removed include sulfur, oxygenate, and nitrogen based contaminants.
    Type: Application
    Filed: November 3, 2017
    Publication date: January 23, 2020
    Inventors: Stephen R. Caskey, Munish Kumar Sharma, Jayant K. Gorawara, Pijus Kanti Roy, Frank S. Modica
  • ENHANCEMENT OF REDUCTION RESISTANCE FOR MANGANESE OXIDE ADSORBENTS
    Publication number: 20190184369
    Abstract: Processes for removing arsenic compounds from a feed stream using an adsorbent in disclosed. The process includes contacting a feed stream comprising at least arsenic and sulfur compounds with an adsorbent comprising an low-crystallinity manganese oxide, at least one halide and a binder, to provide a treated effluent substantially free of the arsenic and sulfur compounds.
    Type: Application
    Filed: November 30, 2018
    Publication date: June 20, 2019
    Inventors: Stephen R. Caskey, Michael B. Hamoy
  • REMOVAL OF SELENOCYANATE FROM INDUSTRIAL WATER SYSTEMS WITH SULFIDED METAL ADSORBENTS
    Publication number: 20180319674
    Abstract: The invention provides a bound sulfided metal containing metals such as nickel, cobalt, iron manganese or zinc for removing selenocyanate from aqueous streams. The binder may be alumina, silica, clay or metal oxide. The amount of sulfur in the bound sulfided metal may range from 5-75% by weight. In one embodiment, the bound sulfided metal is formed and reduced and placed in a column system that comprises one or more columns and may comprise a Lead-Lag1-Lag2-Polisher series of columns.
    Type: Application
    Filed: May 4, 2017
    Publication date: November 8, 2018
    Inventors: Rashmi Patwardhan, Jon E. Ball, Kiran Bollapragada, Stephen R. Caskey
  • Method of Making Supported Copper Adsorbents Having Copper at Selectively Determined Oxidation Levels
    Publication number: 20130204064
    Abstract: A method of removing O2, CO, H2, mercury, and/or sulfur from a fluid stream using a sorbent comprising metallic copper. The metallic copper is formed from direct reduction of a supported copper oxysalt by exposure to a reducing agent at a temperature of between about 40° C. and about 220° C.
    Type: Application
    Filed: February 6, 2012
    Publication date: August 8, 2013
    Applicant: UOP LLC
    Inventors: Vladislav Ivanov Kanazirev, Stephen R. Caskey