Patents by Inventor Arndt Zschalich

Arndt Zschalich 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).

  • Method for decreasing the sulfur content of phosphorous
    Patent number: 5310530
    Abstract: A method for purifying phosphorus to insure a low sulfur content involves intensively mixing phosphorus and concentrated sulfuric acid to form an emulsion, breaking the emulsion by contact with water or dilute sulfuric acid, and then immediately separating the phosphorus and diluted sulfuric acid. The separated phosphorus is then stored in water until further processing is desired and is characterized by a sulfur content as low as about 50 ppm.
    Type: Grant
    Filed: September 7, 1993
    Date of Patent: May 10, 1994
    Assignee: Chemie AG Bitterfeld-Wolfen
    Inventors: Arndt Zschalich, Rudolf Schumann
  • Method for the removal of sulfur from phosphorus
    Patent number: 5296212
    Abstract: A method for purifying white phosphorus contaminated with sulfur bound thereto involves contacting contaminated white phosphorus with water, steam, aqueous solutions, or vaporized aqueous solutions, preferably alkaline, to remove bound sulfur from the phosphorus. The purified phosphorus is characterized by a sulfur content as low as 50 ppm.
    Type: Grant
    Filed: April 21, 1992
    Date of Patent: March 22, 1994
    Assignee: Chemie AG Bitterfeld-Wolfen
    Inventors: Arndt Zschalich, Rudolf Schumann