Patents by Inventor Abraham J. VAN DER Zeeuw

Abraham J. VAN DER Zeeuw 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).

  • Liquid/liquid extraction of nickel values
    Patent number: 4234546
    Abstract: A process is described for the selective recovery of nickel values from an aqueous solution containing nickel values by means of liquid/liquid extraction, wherein the aqueous solution is contacted with an organic extractant comprising a substantially water-immisicible organic solvent and one or more of certain alpha,beta-dioxime compounds. Novel alpha, beta-dioxime compounds for use in the extraction process are also described.
    Type: Grant
    Filed: March 1, 1979
    Date of Patent: November 18, 1980
    Assignee: Shell Oil Company
    Inventors: Abraham J. van der Zeeuw, Peter Koenders, Riekert Kok
  • Extraction of copper values from aqueous solution
    Patent number: 4173616
    Abstract: A process is described for the recovery of copper values from an acidic aqueous solution containing copper values by means of liquid-liquid extraction, wherein the extractant is a mixture comprising a substantially water-immiscible organic solvent, one or more hydroxyoximes capable of extracting copper values, and one or more alpha, betadioximes of the anti-configuration. Novel alpha, beta-dioxime compounds are also disclosed.
    Type: Grant
    Filed: March 7, 1978
    Date of Patent: November 6, 1979
    Assignee: Shell Oil Company
    Inventors: Peter Koenders, Abraham J. Van der Zeeuw, Riekert Kok
  • Extraction of Cu(II), Fe(III), Ni(II), Co(II), Cd(II), Zn(II), Ca(II) and Mg(II) metal values using 2-hydroxy iminoacetic acids
    Patent number: 4108958
    Abstract: Novel 2-hydroxyiminoacetic acids of the formula ##STR1## where R is an aromatic hydrocarbyl group substituted with one or more aliphatic chains of at least four carbon atoms are excellent for the extraction of metal values from acidic metal - containing aqueous solutions, particularly for the separation of Cu from Fe, Ni from Co and Ca from Mg.
    Type: Grant
    Filed: July 15, 1977
    Date of Patent: August 22, 1978
    Assignee: Shell Oil Company
    Inventors: Riekert Kok, Abraham J. VAN DER Zeeuw