Patents by Inventor Victor N. Saleh

Victor N. Saleh 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).

  • Recovery of germanium from aqueous solutions by solvent extraction
    Patent number: 4915919
    Abstract: An improved method for selectively rcovering Ge from acidic solution containing Ge and typically Zn, As, Cd, Sb, In, Cu and Fe (II) by multistage, countercurrent liquid-liquid extraction is described. The extractant used in the organic phase is an oxime, for example, 5,8-diethyl-7-hydroxy-6-dodecanone oxime, mixed with at least one alkylphosphoric acid, for example either di-2-ethylhexyl phosphate alone or admixed with mono-2-ethylhexyl phosphate, dissolved in a hydrocarbon diluent. This mixed system shows better efficiency and selectivity for germanium than known systems using either oximes or alkylphosphoric acids separately.
    Type: Grant
    Filed: August 29, 1988
    Date of Patent: April 10, 1990
    Assignee: Cominco Ltd.
    Inventors: Daniel A. D. Boateng, David A. Neudorf, Victor N. Saleh