Patents by Inventor Richard T. Stimek

Richard T. Stimek 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 to C-manufacture acrylonitrile and hydrogen cyanide
    Publication number: 20090223804
    Abstract: A process for co-manufacture of acrylonitrile and hydrogen cyanide comprises combining a stream comprising hydrogen cyanide and an acrylonitrile reactor product stream, to produce a combined product stream, having a ratio of acrylonitrile to hydrogen cyanide of about 9 to 1 or less, which can be varied; and treating the combined product stream in a recovery/purification system of acrylonitrile process wherein pH is controlled by addition of an acid to prevent HCN polymerization. The ratio of acrylonitrile to hydrogen cyanide is generally between 2 to 1 and 9 to 1. The stream comprising hydrogen cyanide is advantageously a hydrogen cyanide product stream from a hydrogen cyanide synthesis reactor.
    Type: Application
    Filed: March 5, 2008
    Publication date: September 10, 2009
    Inventors: Brent E. Basham, Richard T. Stimek
  • Separation of amine from a phenolic compound
    Patent number: 7049471
    Abstract: A process comprises contacting a product mixture with a base, optionally in the presence of a polyhydric alcohol, to produce a base-treated mixture and distilling the base-treated mixture in which the product mixture comprises an aromatic amine and a phenolic compound.
    Type: Grant
    Filed: March 11, 2004
    Date of Patent: May 23, 2006
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Carl Andrew Renner, Richard Frank Dubnansky, Freddison A. Parsons, Richard T. Stimek, Zhihong Wu