Patents by Inventor Janet Marie Rogers

Janet Marie Rogers 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).

  • Sodium cyanide process
    Patent number: 6896863
    Abstract: A process that can be used to produce NaCN is provided. The process comprises contacting hydrogen cyanide with sodium hydroxide solution to produce a NaCN solution and crystallizing the NaCN solution wherein the process is carried out in the presence of an acid or a metal salt of the acid in which the acid has a pKa?4.4. The NaCN crystals can be separated from the slurry and dried.
    Type: Grant
    Filed: April 1, 2003
    Date of Patent: May 24, 2005
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Janet Marie Rogers, Daniel Albert Green
  • Sodium cyanide process
    Publication number: 20040197256
    Abstract: A process that can be used to produce NaCN is provided. The process comprises contacting hydrogen cyanide with sodium hydroxide solution to produce a NaCN solution and crystallizing the NaCN solution wherein the process is carried out in the presence of an acid or a metal salt of the acid in which the acid has a pKa≦4.4. The NaCN crystals can be separated from the slurry and dried.
    Type: Application
    Filed: April 1, 2003
    Publication date: October 7, 2004
    Inventors: Janet Marie Rogers, Daniel Albert Green
  • Nitrile process
    Patent number: 6355828
    Abstract: A process for purifying a nitrile such as acrylonitrile is disclosed. The process comprises (1) contacting a product mixture, which comprises acrylonitrile and hydrogen cyanide, with an acid or a precursor of the acid to produce an acid-treated product; and (2) recovering the nitrile from the acid-treated product. The product mixture can be produced by contacting ammonia with a hydrocarbon such as an olefin under a condition effective to produce a nitrile and hydrogen cyanide.
    Type: Grant
    Filed: November 10, 2000
    Date of Patent: March 12, 2002
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Janet Marie Rogers, Robert Clifford Blackstone, Jeffrey Jon Horsager
  • Sodium cyanide paste composition
    Patent number: 6183710
    Abstract: A sodium cyanide composition having a paste-like consistency is provided which comprises sodium cyanide, a base, water, and a rheology modifier. Also provided are processes for producing and using the composition. The composition can be used in applications that require sodium cyanide solution.
    Type: Grant
    Filed: April 8, 1999
    Date of Patent: February 6, 2001
    Assignee: E. I du Pont de Nemours and Company
    Inventors: Janet Marie Rogers, Thomas Peter Tufano
  • Nitrile process
    Patent number: 6084121
    Abstract: A process for purifying a nitrile such as acrylonitrile is disclosed. The process comprises (1) contacting a product mixture, which comprises acrylonitrile and hydrogen cyanide, with glycolic acid or a glycolic acid-generating compound to produce a glycolic acid-treated product; and (2) recovering the nitrile from the glycolic acid-treated product. The product mixture can be produced by contacting ammonia with an olefin under a condition effective to produce a nitrile and hydrogen cyanide.
    Type: Grant
    Filed: September 9, 1999
    Date of Patent: July 4, 2000
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Janet Marie Rogers, William Randolph Leyendecker, Robert Clifford Blackstone