Patents by Inventor Wilhelmus Pannekeet

Wilhelmus Pannekeet 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 regeneration of a sorbent
    Patent number: 4353992
    Abstract: A process is disclosed for the regeneration of a sorbent, particularly an ion exchanger used in the recovery, isolation or production of sugars, wherein a regeneration solution is used which contains at least 20 meq/l of an alkali metal hydroxide or hydroxide of an alkaline earth metal having an atomic number of at least 20, and at least 1% by weight of a monosaccharide or disaccharide.
    Type: Grant
    Filed: December 18, 1980
    Date of Patent: October 12, 1982
    Assignee: Akzona Incorporated
    Inventor: Wilhelmus Pannekeet
  • Process for purifying an aqueous solution
    Patent number: 4160675
    Abstract: A process for removing an organic impurity from an aqueous solution is disclosed, said process comprising contacting the aqueous solution with an acid cation exchanger and subsequently with a polymer or polycondensate, which contains sulfur in the form of thiol groups bonded to carbon atoms.
    Type: Grant
    Filed: September 12, 1977
    Date of Patent: July 10, 1979
    Assignee: Akzona Incorporated
    Inventors: Wilhelmus Pannekeet, Robert Smakman
  • Method for the removal of ferric ions from a concentrated aqueous zinc solution
    Patent number: 4157298
    Abstract: Ferric ions are removed from a concentrated aqueous zinc solution having a pH value in the range of about 0 to about 1.3, by contacting the zinc solution with a cation exchange chelate resin containing aminocarboxylic acid and/or iminodicarboxylic acid groups.
    Type: Grant
    Filed: December 23, 1977
    Date of Patent: June 5, 1979
    Assignee: Akzona Incorporated
    Inventors: Gerrit H. van den Berg, Wilhelmus Pannekeet, Kees Koerts, Robert Smakman
  • Process for the separate recovery of vanadium and molybdenum
    Patent number: 4051221
    Abstract: A process of separately recovering vanadium and molybdenum from an aqueous solution containing a vanadium compound is disclosed. The process comprises adjusting the pH of such a solution to a pH between 1.5 and 7, contacting the solution with a weakly basic anion exchanger in the salt form, eluting said anion exchanger with an ammonium hydroxide solution having a strength between about 1 and 4N, crystallizing the resulting ammonium vanadate, and separating the same from the vanadium and molybdenum solution obtained in said elution.
    Type: Grant
    Filed: April 12, 1976
    Date of Patent: September 27, 1977
    Assignee: Akzona Incorporated
    Inventors: Wilhelmus Pannekeet, Gerhard E. W. K. Steenken, Roeland H. Voogd