Patents by Inventor Richard E. Barrans, Jr.

Richard E. Barrans, Jr. 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).

  • Multivalent metal ion extraction using diglycolamide-coated particles
    Patent number: 7553461
    Abstract: A separation medium, a method for using that separation medium and an apparatus for selectively extracting multivalent cations such as pseudo-lanthanide, prelanthanide, lanthanide, preactinide or actinide cations from an aqueous acidic sample solution is described. The separation medium is preferably free-flowing and comprises particles having a diglycolamide (DGA) extractant dispersed onto an inert, porous support.
    Type: Grant
    Filed: January 2, 2007
    Date of Patent: June 30, 2009
    Assignee: PG Research Foundation, Inc.
    Inventors: E. Philip Horwitz, Richard E. Barrans, Jr., Andrew H. Bond
  • Multivalent metal ion extraction using diglycolamide-coated particles
    Patent number: 7157022
    Abstract: A separation medium, a method for using that separation medium and an apparatus for selectively extracting multivalent cations such as pseudo-lanthanide, prelanthanide, lanthanide, preactinide or actinide cations from an aqueous acidic sample solution is described. The separation medium is preferably free-flowing and comprises particles having a diglycolamide (DGA) extractant dispersed onto an inert, porous support.
    Type: Grant
    Filed: January 27, 2003
    Date of Patent: January 2, 2007
    Assignee: .PG Research Foundation, Inc.
    Inventors: E. Philip Horwitz, Richard E. Barrans, Jr., Andrew H. Bond
  • Purification of 4,4?(5?)- di-t-butylcyclohexano-18-crown-6
    Patent number: 7091338
    Abstract: A purification method is disclosed for a predetermined water-insoluble extractant present in a liquid phase composition that additionally contains one or more additional extractants, synthesis reaction starting materials, and reaction byproducts dissolved as solutes in an organic diluent. An ion-containing compound is admixed with the composition to form an extractant/ion complex in the organic diluent phase that has an affinity for a new phase that is greater than the affinity for the first-named phase. The predetermined extractant/ion complex is separated from the diluent by using the new phase affinity, and the extractant/ion complex is preferably although not necessarily recovered. The extractant/ion complex is separated into extractant and ion. The extractant is recovered. Exemplary extractants include polyethers, crown ethers, crown thioethers, calixarenes, polyamines, cryptands, porphyrins and the like.
    Type: Grant
    Filed: October 31, 2002
    Date of Patent: August 15, 2006
    Assignee: PG Research Foundation
    Inventors: Andrew H. Bond, Richard E. Barrans, Jr., E. Philip Horwitz
  • Composition and process for separating cesium ions from an acidic aqueous solution also containing other ions
    Patent number: 5888398
    Abstract: A crown ether cesium ion extractant is disclosed as is its synthesis. The crown ether cesium ion extractant is useful for the selective purification of cesium ions from aqueous acidic media, and more particularly useful for the isolation of radioactive cesium-137 from nuclear waste streams. Processes for isolating cesium ions from aqueous acidic media using the crown ether cesium extractant are disclosed as are processes for recycling the crown ether cesium extractant and processes for recovering cesium from a crown ether cesium extractant solution.
    Type: Grant
    Filed: January 27, 1997
    Date of Patent: March 30, 1999
    Assignee: ARCH Development Corp.
    Inventors: Mark L. Dietz, E. Philip Horwitz, Richard A. Bartsch, Richard E. Barrans, Jr., David Rausch