Patents by Inventor James Arnold Schultz

James Arnold Schultz 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).

  • Publication number: 20120116046
    Abstract: A process for the preparation of diaminodinitropyridine or diaminodinitrobenzene by contacting an aminopyridine or aminobenzene with oleum and nitric acid, wherein the improvement comprises adding at least about 1% molar excess of nitric acid, based upon the aminopyridine or aminobenzene, with stirring for at least two hours to form first the intermediate sulfonic acid, and then diaminodinitropyridine or diaminodinitrobenzene, and use of such products in the preparation of rigid rod polymers is disclosed.
    Type: Application
    Filed: January 9, 2012
    Publication date: May 10, 2012
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: HASAN DINDI, James Arnold Schultz
  • Patent number: 8115007
    Abstract: A process for the preparation of diaminodinitropyridine or diaminodinitrobenzene by contacting an aminopyridine or aminobenzene with oleum and nitric acid, wherein the improvement comprises adding at least about 1% molar excess of nitric acid, based upon the aminopyridine or aminobenzene with stirring for at least two hours to form first the intermediate sulfonic acid, and then diaminodinitropyridine or diaminodinitrobenzene, and use of such products in the preparation of rigid rod polymers is disclosed.
    Type: Grant
    Filed: November 27, 2007
    Date of Patent: February 14, 2012
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Hasan Dindi, James Arnold Schultz
  • Patent number: 7851584
    Abstract: Disclosed are processes for preparing monomer complexes that include contacting 2,3,5,6-tetraminopyridine free base in water with 2,5-dihydroxy terephthalic acid dipotassium salt to form an aqueous mixture, and adjusting the pH of the aqueous mixture to within the range of from about (3) to about (5) to precipitate the monomer complex. Processes of polymerizing the monomer complexes, polyareneazoles, filaments and yarns are also disclosed.
    Type: Grant
    Filed: March 27, 2006
    Date of Patent: December 14, 2010
    Assignees: E. I. du Pont de Nemours and Company, Magellan Systems International, LLC
    Inventors: Doetze Jakob Sikkema, David J Rodini, Hasan Dindi, James Arnold Schultz, Georg Valentin Martin, Ralf Demuth, Michael Schelhaas
  • Publication number: 20090215946
    Abstract: Disclosed are processes for preparing monomer complexes that include contacting 2,3,5,6-tetraaminopyridine free base in water with 2,5-dihydroxy terephthalic acid dipotassium salt to form an aqueous mixture, and adjusting the pH of the aqueous mixture to within the range of from about (3) to about (5) to precipitate the monomer complex. Processes of polymerizing the monomer complexes, polyareneazoles, filaments and yarns are also disclosed.
    Type: Application
    Filed: March 27, 2006
    Publication date: August 27, 2009
    Inventors: Doetze Jakob Sikkema, David J. Rodini, Hasan Dindi, James Arnold Schultz, Georg Valentin Martin, Ralf Demuth, Michael Schelhaas
  • Publication number: 20090137814
    Abstract: A process for the preparation of diaminodinitropyridine or diaminodinitrobenzene by contacting an aminopyridine or aminobenzene with oleum and nitric acid, wherein the improvement comprises adding at least about 1% molar excess of nitric acid, based upon the aminopyridine or aminobenzene, with stirring for at least two hours to form first the intermediate sulfonic acid, and then diaminodinitropyridine or diaminodinitrobenzene, and use of such products in the preparation of rigid rod polymers is disclosed.
    Type: Application
    Filed: November 27, 2007
    Publication date: May 28, 2009
    Inventors: Hasan Dindi, James Arnold Schultz
  • Patent number: 7524995
    Abstract: A continuous process for producing hexafluoroisopropanol is provided which comprises contacting hexafluoroacetone with hexafluoroisopropanol and hydrogen to produce a liquid feed stream; introducing the liquid feed stream to a reactor containing an immobilized hydrogenation catalyst to convert the hexafluoroacetone to hexafluoroisopropanol and provide a product stream; and recovering at least a portion of the hexafluoroisopropanol from the product stream. Preferably a portion of the product stream is recycled. The reactor can be a packed bed or stirred tank reactor.
    Type: Grant
    Filed: June 12, 2008
    Date of Patent: April 28, 2009
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Stephen M. Tieri, John Joseph Hagedom, James Arnold Schultz, Tiberiu M. Leib, Susanne Hawthorne Wolff, Sourav K. Sengupta, Gregory Paul Shankwitz
  • Patent number: 6437159
    Abstract: A process that can be used for isolating a fluorinated alkanoic acid from an aqueous solution also containing inorganic fluorides is provided. This process comprises (A) acidifying an aqueous solution comprising an ammonium or metal salt of a fluorinated alkanoic acid to produce an acidified solution, (B) heating the acidified solution to produce an organic layer and an aqueous layer, (C) separating and recovering the organic layer from the aqueous layer, (D) optionally washing the organic layer with an acid solution, (E) optionally isolating the fluorinated alkanoic acid, and (F) further optionally converting the fluorinated alkanoic acid to its ammonium or alkali metal salt.
    Type: Grant
    Filed: July 31, 2001
    Date of Patent: August 20, 2002
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: James Arnold Schultz
  • Publication number: 20020087016
    Abstract: A process that can be used for isolating a fluorinated alkanoic acid from an aqueous solution also containing inorganic fluorides is provided. This process comprises (A) acidifying an aqueous solution comprising an ammonium or metal salt of a fluorinated alkanoic acid to produce an acidified solution, (B) heating the acidified solution to produce an organic layer and an aqueous layer, (C) separating and recovering the organic layer from the aqueous layer, (D) optionally washing the organic layer with an acid solution, (E) optionally isolating the fluorinated alkanoic acid, and (F) further optionally converting the fluorinated alkanoic acid to its ammonium or alkali metal salt.
    Type: Application
    Filed: July 31, 2001
    Publication date: July 4, 2002
    Inventor: James Arnold Schultz
  • Patent number: 6281374
    Abstract: A process that can be used for isolating a fluorinated alkanoic acid from an aqueous solution also containing inorganic fluorides is provided. This process comprises (A) acidifying an aqueous solution comprising an ammonium salt of a fluorinated alkanoic acid to produce an acidified solution, (B) heating the acidified solution to produce an organic layer and an aqueous layer, (C) separating and recovering the organic layer from the aqueous layer, (D) optionally washing the organic layer with an acid solution, (E) optionally isolating the fluorinated alkanoic acid, and (F) further optionally converting the fluorinated alkanoic acid to its ammonium salt.
    Type: Grant
    Filed: August 23, 2000
    Date of Patent: August 28, 2001
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: James Arnold Schultz