Patents by Inventor Anthonie Van Sandwijk

Anthonie Van Sandwijk 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 the Electrolysis of Aluminiumsulfide
    Publication number: 20080202939
    Abstract: Process for the electrolysis of Al2S3, using a bath of molten salt, preferably a bath of molten chloride salt, in which Al2S3 is dissolved characterized in that measures are taken to improve the electrical conductivity of the bath, so as to enable an increase in the current density in the bath.
    Type: Application
    Filed: March 31, 2004
    Publication date: August 28, 2008
    Applicant: Corus Aluminum Walzprodukte GmbH
    Inventors: Dietrich Willem Van Der Plas, Steven Christian Lans, Markus Andreas Reuter, Mpia Cyril Roger Mambote, Anthonie Van Sandwijk, Yanping Xiao
  • Production of zinc oxide from complex sulfide concentrates using chloride processing
    Patent number: 6395242
    Abstract: The present invention relates to an apparatus and a process for producing zinc oxide from a zinc-bearing material. The process according to the present invention comprises the steps of leaching the complex sulfide material with hydrochloric acid and oxygen; precipitating iron from the leach solution using magnesium oxide and oxygen; removing copper, silver, cadmium, cobalt and lead from the leach solution by cementation with zinc dust; precipitating zinc oxide from the leach solution using magnesium oxide; and spray roasting the remaining magnesium chloride leach solution to regenerate hydrochloric acid and magnesium oxide. The present invention further relates to processes for recovering copper, silver, lead, and iron from complex sulfide materials.
    Type: Grant
    Filed: October 1, 1999
    Date of Patent: May 28, 2002
    Assignee: Noranda Inc.
    Inventors: Carole Allen, Peter Kondos, Serge Payant, Gezinus Van Weert, Anthonie Van Sandwijk
  • Method for selectively separating a non-ferrous metal
    Patent number: 5089242
    Abstract: A method for selectively separating Zn from an acidic aqueous solution containing ions of Zn and Fe obtained by leaching of blast furnace dust using hydrochloric acid comprises first precipitating Fe from the solution and then treating the resultent Zn-containing solution with an alkali to precipitate Zn.The Zn-containing solution is treated in two stages; in the first precipitation step the pH is adjusted to from 4.0 to 4.3.
    Type: Grant
    Filed: November 5, 1990
    Date of Patent: February 18, 1992
    Assignee: Hoogovens Groep BV
    Inventors: Job Dijkhuis, Anthonie Van Sandwijk