Patents by Inventor Katelyn Rae Walck

Katelyn Rae Walck 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 the nitration of O-xylene and related compounds
    Patent number: 8642781
    Abstract: Aromatic compounds such as o-xylene are selectively nitrated by nitric acid in the presence of polyphosphoric acid and a large pore, acidic zeolite or a large pore, hydrophobic molecular sieve. This is an environmentally friendly, commercially viable, high conversion process for the selective nitration of aromatic compounds in the para position.
    Type: Grant
    Filed: August 27, 2010
    Date of Patent: February 4, 2014
    Assignee: E I du Pont de Nemours and Company
    Inventors: David Richard Corbin, Joachim C. Ritter, James A. Schultz, Sourav Kumar Sengupta, Katelyn Rae Walck
  • Purification of fluoroalkanesulfonate salts
    Patent number: 8461378
    Abstract: A process for the purification of fluoroalkanesulfonate salt comprising (a) contacting a mixture of said salt and an inorganic salt contaminant with a solvent to selectively dissolve said fluoroalkanesulfonate salt in solution, and (b) isolating the solution, to yield a fluoroalkanesulfonate salt containing less than 500 micrograms of inorganic salt contaminant per gram of fluoroalkanesulfonate salt, or containing less than a maximum of 0.3% by weight of individual solvent.
    Type: Grant
    Filed: September 10, 2010
    Date of Patent: June 11, 2013
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Allen Capron Sievert, Lee Grant Sprague, James A. Schultz, Katelyn Rae Walck
  • PURIFICATION OF FLUOROALKANESULFONATE SALTS
    Publication number: 20120065425
    Abstract: A process for the purification of fluoroalkanesulfonate salt comprising (a) contacting a mixture of said salt and an inorganic salt contaminant with a solvent to selectively dissolve said fluoroalkanesulfonate salt in solution, and (b) isolating the solution, to yield a fluoroalkanesulfonate salt containing less than 500 micrograms of inorganic salt contaminant per gram of fluoroalkanesulfonate salt, or containing less than a maximum of 0.3% by weight of individual solvent.
    Type: Application
    Filed: September 10, 2010
    Publication date: March 15, 2012
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: ALLEN CAPRON SIEVERT, LEE GRANT SPRAGUE, JAMES A. SCHULTZ, KATELYN RAE WALCK
  • PROCESS FOR THE NITRATION OF O-XYLENE AND RELATED COMPOUNDS
    Publication number: 20110054219
    Abstract: Aromatic compounds such as o-xylene are selectively nitrated by nitric acid in the presence of polyphosphoric acid and a large pore, acidic zeolite or a large pore, hydrophobic molecular sieve. This is an environmentally friendly, commercially viable, high conversion process for the selective nitration of aromatic compounds in the para position.
    Type: Application
    Filed: August 27, 2010
    Publication date: March 3, 2011
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: David Richard Corbin, Joachim C. Ritter, James A. Schultz, Sourav Kumar Sengupta, Katelyn Rae Walck