Patents by Inventor Alfred Irlenkauser

Alfred Irlenkauser 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 purification of electrolysis brine
    Patent number: 3970528
    Abstract: Brine is purified prior to electrolysis by dividing it into two streams, removing sulfate from one of the streams by precipitation with calcium chloride to form calcium sulfate, removing the precipitate and re-combining the streams. Alkali hydroxide plus sodium carbonate are added to the re-combined streams to precipitate calcium carbonate which is removed. Any magnesium comes down as the hydroxide. The brine is then pure enough for electrolysis The calcium sulfate first precipitate is reacted with sodium hydroxide and carbon dioxide to form calcium carbonate which is then reacted with hydrochloric acid to form calcium chloride which is recycled to the process for precipitating calcium sulfate.
    Type: Grant
    Filed: October 20, 1975
    Date of Patent: July 20, 1976
    Assignee: Bayer Aktiengesellschaft
    Inventors: Eberhard Zirngiebl, Alfred Irlenkauser