Patents by Inventor Avtar S. Jassal

Avtar S. Jassal 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).

  • Solvent extraction process for preparing purified phosphoric acid and sodium phosphate salts
    Patent number: 4285920
    Abstract: Disclosed is a process for concurrently preparing purified phosphoric acid and purified sodium phosphate salts by employing a solvent extraction process with three neutralization steps.
    Type: Grant
    Filed: November 8, 1979
    Date of Patent: August 25, 1981
    Assignee: Stauffer Chemical Company
    Inventor: Avtar S. Jassal
  • Wet process phosphoric acid purification
    Patent number: 4197280
    Abstract: Extraction battery fouling is reduced in the solvent extraction purification of crude phosphoric acid by performing the steps of:(a) extracting crude phosphoric acid with solvent in a main extraction battery without the addition of sulfuric acid;(b) acidulating the raffinate from step (a) with at least a precipitate-forming amount of sulfuric acid;(c) aging the precipitate of step (b) for at least 15 minutes, and separating the precipitate from the acidulated raffinate;(d) extracting with organic solvent the essentially precipitate-free raffinate of step (c) in a secondary extraction battery.
    Type: Grant
    Filed: October 2, 1978
    Date of Patent: April 8, 1980
    Assignee: Stauffer Chemical Company
    Inventor: Avtar S. Jassal