Patents by Inventor Barbara I. Veldhuis-Stribos

Barbara I. Veldhuis-Stribos 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).

  • Continuous process for preparing lactic acid
    Patent number: 6509179
    Abstract: The invention relates to a continuous process for preparing lactic acid, comprising: (a) acidifying an aqueous feed, which has been obtained by fermentation and mainly contains lactate, with a stream containing inorganic acid to a pH of from 1 to 4 to form an aqueous stream which mainly consists of lactic acid and a salt, (b) removing the salt from the aqueous stream which mainly contains lactic acid and salt to form a first aqueous stream which mainly contains lactic acid, (c) passing the first aqueous stream which mainly contains lactic acid over a column containing activated carbon to form a second aqueous stream which mainly contains lactic acid, (d) subjecting the second aqueous stream which mainly contains lactic acid to a first extraction step, wherein the second aqueous stream which mainly contains lactic acid is brought into contact with a substantially water-insoluble stream which contains an extractant, to form an organic phase which mainly contains lactic acid and extractant and a first water
    Type: Grant
    Filed: October 12, 2000
    Date of Patent: January 21, 2003
    Inventors: Barbara I. Veldhuis-Stribos, Wim J. Groot, Brenda M. Dierdorp, Jan Van Breugel, Paul L. McWilliams, Jeff J. Malsam, Rod R. Fisher, Scott McElmury