Patents by Inventor Ismo Rosengren

Ismo Rosengren 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).

  • Method for recovering hydrolysate
    Patent number: 9663896
    Abstract: The method is for producing pulp. More particularly, a displacement batch cooking process comprises recovery of a first treatment liquid by draining of the digester, preferably not using a displacement liquid. The method may preferably be used in a prehydrolysis step, wherein the recovery of the by-products is improved. In the recovery step, after the target P-factor in the prehydrolysis stage is reached, the hydrolysate is withdrawn by draining in at least one phase obtaining a strong first liquid and thereafter any residual hydrolysate may be displaced.
    Type: Grant
    Filed: November 3, 2015
    Date of Patent: May 30, 2017
    Assignee: VALMET AB
    Inventors: Ismo Rosengren, Petteri Kuusisto, Lari Lammi
  • METHOD FOR RECOVERING HYDROLYSATE
    Publication number: 20160130753
    Abstract: The method is for producing pulp. More particularly, a displacement batch cooking process comprises recovery of a first treatment liquid by draining of the digester, preferably not using a displacement liquid. The method may preferably be used in a prehydrolysis step, wherein the recovery of the by-products is improved. In the recovery step, after the target P-factor in the prehydrolysis stage is reached, the hydrolysate is withdrawn by draining in at least one phase obtaining a strong first liquid and thereafter any residual hydrolysate may be displaced.
    Type: Application
    Filed: November 3, 2015
    Publication date: May 12, 2016
    Inventors: Ismo Rosengren, Petteri Kuusisto, Lari Lammi