Patents by Inventor Olivia Rajchel

Olivia Rajchel 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).

  • Process for treating a mixed feed of hydrogen sulfide gas and ammonia gas to produce ammonium thiosulfate and including methodology for emissions control
    Patent number: 11254570
    Abstract: This invention relates to production of an aqueous solution containing ammonium thiosulfate from a feed gas containing hydrogen sulfide (H2S) and ammonia (NH3). Sufficient separation of feed gas H2S from NH3 is achieved by controlling individual NH3 and H2S absorption mass-transfer rates in a single co-current stage, whereby a first gas contacts a first liquid containing ammonium bisulfite (ABS). Substantially more NH3 is absorbed than H2S, converting ABS to diammonium sulfite (DAS). A portion of DAS reacts with a sufficiently small portion of H2S to produce ATS and leaves as a second liquid stream. A larger portion of H2S leaves as a second gas stream. The second gas stream is oxidized to sulfur dioxide (SO2) comprising a third gas stream. The third gas stream contacts the second aqueous stream in a second contact stage whereby DAS in the second liquid stream is converted to ABS and returned to the first contacting zone.
    Type: Grant
    Filed: April 20, 2021
    Date of Patent: February 22, 2022
    Assignee: CLARKE RAJCHEL ENGINEERING, LLC
    Inventors: Marcus Rajchel, Olivia Rajchel, Sydney Rajchel
  • PROCESS FOR TREATING A MIXED FEED OF HYDROGEN SULFIDE GAS AND AMMONIA GAS TO PRODUCE AMMONIUM THIOSULFATE AND INCLUDING METHODOLOGY FOR EMISSIONS CONTROL
    Publication number: 20210331923
    Abstract: This invention relates to production of an aqueous solution containing ammonium thiosulfate from a feed gas containing hydrogen sulfide (H2S) and ammonia (NH3). Sufficient separation of feed gas H2S from NH3 is achieved by controlling individual NH3 and H2S absorption mass-transfer rates in a single co-current stage, whereby a first gas contacts a first liquid containing ammonium bisulfite (ABS). Substantially more NH3 is absorbed than H2S, converting ABS to diammonium sulfite (DAS). A portion of DAS reacts with a sufficiently small portion of H2S to produce ATS and leaves as a second liquid stream. A larger portion of H2S leaves as a second gas stream. The second gas stream is oxidized to sulfur dioxide (SO2) comprising a third gas stream. The third gas stream contacts the second aqueous stream in a second contact stage whereby DAS in the second liquid stream is converted to ABS and returned to the first contacting zone.
    Type: Application
    Filed: April 20, 2021
    Publication date: October 28, 2021
    Inventors: Marcus Rajchel, Olivia Rajchel, Sydney Rajchel