Patents by Inventor Gregory Mandigo

Gregory Mandigo 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).

  • Patent number: 11180397
    Abstract: Many processes generate wastewater streams rich in sulfate and chloride. These salt components are traditionally not recovered and are discharged to the environment. The invention recovers pure water for recycle/reuse and simultaneously generates valuable pure salts of NaCl and Na2SO4 for beneficial reuse, eliminating the waste stream. Process consists of the sequential crystallization of salt products with an intermediate purification step in which a chemical reactant is added to elevate levels of purity. The process is configured to simultaneously achieve zero liquid discharge.
    Type: Grant
    Filed: December 3, 2018
    Date of Patent: November 23, 2021
    Assignee: AQUATECH INTERNATIONAL, LLC
    Inventors: Daniel P. Bjorklund, Vinod A. Raje, James M. Marlett, Manish Backliwal, Richard Schoen, Gregory Mandigo
  • Publication number: 20200317535
    Abstract: A sodium chloride recovery method for upgrading a mixed salt stream from lower sodium chloride purity to an increased sodium chloride purity is provided. The salt recovery method utilizes the solubility properties of the impurities in the mixed salt to preferentially dissolve them over sodium chloride. As the impurities are removed from the solid phase using a salt stripper, sodium chloride rich slurry is generated. The rich salt slurry is processed by an upgrader to remove the remaining impurities. The upgraded sodium chloride slurry is dewatered and washed in the phase separator to generate sodium chloride salt at a higher purity.
    Type: Application
    Filed: April 2, 2019
    Publication date: October 8, 2020
    Inventors: Daniel P. Bjorklund, Gregory Mandigo, Garry D. Glover, Manish Backliwal, Lindsay C. Buhl
  • Publication number: 20190169056
    Abstract: Many processes generate wastewater streams rich in sulfate and chloride. These salt components are traditionally not recovered and are discharged to the environment. The invention recovers pure water for recycle/reuse and simultaneously generates valuable pure salts of NaCl and Na2SO4 for beneficial reuse, eliminating the waste stream. Process consists of the sequential crystallization of salt products with an intermediate purification step in which a chemical reactant is added to elevate levels of purity. The process is configured to simultaneously achieve zero liquid discharge.
    Type: Application
    Filed: December 3, 2018
    Publication date: June 6, 2019
    Inventors: Daniel P. Bjorklund, Vinod A. Raje, James M. Marlett, Manish Backliwal, Richard Schoen, Gregory Mandigo