Patents by Inventor Peter Pfuller

Peter Pfuller 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 recovering gallium from basic aqueous sodium aluminate solutions by means of liquid-liquid extraction
    Patent number: 4865824
    Abstract: A process is described for recovering gallium from a basic aqueous sodium aluminate solution by means of liquid-liquid extraction, in which process the aqueous sodium aluminate solution to be extracted is brought into contact with a water-insoluble extraction solution, comprising essentially a water-insoluble substituted hydroxyquinoline and a selected water-insoluble aldoxime as extractant, and a water-insoluble organic solvent for the extractant, the organic phase is separated off from the aqueous phase after bringing the two solutions into contact, and the gallium is recovered from the organic phase.
    Type: Grant
    Filed: June 8, 1988
    Date of Patent: September 12, 1989
    Assignee: Hoechst Aktiengesellschaft
    Inventor: Peter Pfuller