Patents by Inventor Anders Henrik Wernqvist

Anders Henrik Wernqvist 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 purifying condensate while evaporating waste liquors
    Patent number: 6258206
    Abstract: A process for evaporating spent liquor or other waste liquids from cellulose cooking, The evaporation is performed in a multiplicity of evaporators which are coupled in series and in which the evaporation is driven using the liquor steam. The condensates from the steam are divided, in one of more effects, into at least two fractions with respect to purity. The parer fraction from one effect is conveyed, at a high level, into a subsequent effect in the direction of movement of the liquor, while the dirtier fraction is conveyed, at a high level or at the very top, into a preceding effect in the direction of movement of the liquor.
    Type: Grant
    Filed: August 19, 1998
    Date of Patent: July 10, 2001
    Assignee: Kvaerner Pulping AB
    Inventors: Lars Gunnar Olausson, Lars Eric Pettersson, Olof Tryggve Wennberg, Anders Henrik Wernqvist