Patents by Inventor Robert Amanrich

Robert Amanrich 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).

  • Solvent purification of wet process phosphoric acid
    Patent number: 3956465
    Abstract: In the purification of wet process phosphoric acid by solvent extraction, there is employed an organic solvent partially miscible with water, e.g. isobutanol. By using such a solvent containing about 40 to 50 % less than the saturation level of dissolvable water, the rate of extraction is improved and the formation of gels is avoided. It is preferred that the temperature during the extraction state be maintained substantially constant.
    Type: Grant
    Filed: February 7, 1974
    Date of Patent: May 11, 1976
    Assignee: Azote et Produits Chimiques S.A.
    Inventor: Robert Amanrich