Patents by Inventor Phillip O. Tyree

Phillip O. Tyree 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).

  • Cyclic solution mining of borate ores
    Patent number: 4475771
    Abstract: A method of recovering boric acid from a subterranean deposit of colemanite ore by solution mining, comprises:supplying a leach solution comprising hydrochloric acid to the subterranean deposit via an injection well in communication therewith, whereby colemanite ore is dissolved and an aqueous pregnant solution of boric acid and calcium chloride is formed in the deposit;withdrawing the pregnant solution of boric acid and calcium chloride from said deposit via a production well in communication therewith;separating boric acid from the withdrawn solution;adding sulfuric acid to the resultant concentrated solution from which boric acid has been separated, whereby hydrochloric acid is regenerated therein and CaSO.sub.4.2H.sub.2 O is formed;separating CaSO.sub.4.2H.sub.2 O from the resultant solution containing regenerated hydrochloric acid thereby forming a regenerated leach solution; andrecycling the regenerated leach solution to the subterranean deposit of colemanite via an injection well.
    Type: Grant
    Filed: March 28, 1983
    Date of Patent: October 9, 1984
    Assignee: Duval Corporation
    Inventors: George E. Atwood, Douglas E. Cochran, Abraham Sadan, Charles Burnett, Phillip O. Tyree, Archibald W. Fletcher