Patents by Inventor Agnieszka Krzyzaniak

Agnieszka Krzyzaniak 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).

  • Extraction of carboxylic acids from a dilute aqueous stream
    Patent number: 9102611
    Abstract: A process for removing free carboxylic acid from an aqueous solution including a mass fraction of less than 1% wt of the free carboxylic acid. The process includes the steps of: (a) contacting the aqueous solution with a depleted solvent including a polyamine extractant to obtain an extract enriched in free carboxylic acid and a raffinate having a reduced free carboxylic acid content; and (b) separating the raffinate from the extract, wherein the polyamine extractant is a compound containing at least two nitrogen atoms, and at least one double bond between a nitrogen atom and a carbon atom.
    Type: Grant
    Filed: January 17, 2013
    Date of Patent: August 11, 2015
    Assignee: PURAC BIOCHEM B.V.
    Inventors: André Banier De Haan, Agnieszka Krzyzaniak, Boelo Schuur
  • EXTRACTION OF CARBOXYLIC ACIDS FROM A DILUTE AQUEOUS STREAM
    Publication number: 20140343317
    Abstract: A process for removing free carboxylic acid from an aqueous solution including a mass fraction of less than 1% wt of the free carboxylic acid. The process includes the steps of: (a) contacting the aqueous solution with a depleted solvent including a polyamine extractant to obtain an extract enriched in free carboxylic acid and a raffinate having a reduced free carboxylic acid content; and (b) separating the raffinate from the extract, wherein the polyamine extractant is a compound containing at least two nitrogen atoms, and at least one double bond between a nitrogen atom and a carbon atom.
    Type: Application
    Filed: January 17, 2013
    Publication date: November 20, 2014
    Inventors: André Banier De Haan, Agnieszka Krzyzaniak, Boelo Schuur