Patents by Inventor Reinhard Gradi

Reinhard Gradi 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 purifying wet-processed phosphoric acid
    Patent number: 4596703
    Abstract: The disclosure relates to a process for purifying crude, concentrated wet-processed phosphoric acid. To this end, the disclosure provides:(a) for the organic solvent to be mixed with the starting product in a ratio by volume of more than 4:1 to effect the extraction in a single process step--from the crude wet-processed phosphoric acid--of a quantity of phosphoric acid necessary for 40 to 70 weight % of the P.sub.2 O.sub.5 used to go into the organic phase, and for the resulting aqueous phosphoric acid raffinate to contain at most 28-32 weight % P.sub.2 O.sub.
    Type: Grant
    Filed: December 1, 1983
    Date of Patent: June 24, 1986
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Reinhard Gradi, Gero Heymer, Gunther Schimmel