Patents by Inventor Jukka KANTOLA

Jukka KANTOLA 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 producing cellulose carbamate
    Patent number: 11584804
    Abstract: A method for controlling discharges of nitrogen compounds in the production of cellulose carbamate (CCA). Microcrystalline cellulose is produced from chemical pulp produced at a pulp mill, such that the chemical pulp is subjected to acid hydrolysis at an elevated temperature to form microcrystalline cellulose (MCC) and hydrolysate, and the MCC is reacted with urea to produce cellulose carbamate whereby ammonia is released. The microcrystalline cellulose production and the cellulose carbamate production are integrated into the pulp mill having a flue gas system such that carbon dioxide from the flue gases is reacted with released ammonia to produce urea, which is used in the carbamate production.
    Type: Grant
    Filed: May 21, 2019
    Date of Patent: February 21, 2023
    Assignee: ANDRITZ OY
    Inventors: Jukka Kantola, Hannu Råmark, Kyösti Valta, Kari Vanhatalo
  • METHOD FOR PRODUCING CELLULOSE CARBAMATE
    Publication number: 20210206883
    Abstract: A method for controlling discharges of nitrogen compounds in the production of cellulose carbamate (CCA). Microcrystalline cellulose is produced from chemical pulp produced at a pulp mill, such that the chemical pulp is subjected to acid hydrolysis at an elevated temperature to form microcrystalline cellulose (MCC) and hydrolysate, and the MCC is reacted with urea to produce cellulose carbamate whereby ammonia is released. The microcrystalline cellulose production and the cellulose carbamate production are integrated into the pulp mill having a flue gas system such that carbon dioxide from the flue gases is reacted with released ammonia to produce urea, which is used in the carbamate production.
    Type: Application
    Filed: May 21, 2019
    Publication date: July 8, 2021
    Inventors: Jukka KANTOLA, Hannu RÅMARK, Kyösti VALTA, Kari VANHATALO