Patents by Inventor Reijo Seppanen

Reijo Seppanen 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 the treatment of fly ash, using hydrochloric acid
    Patent number: 6821384
    Abstract: The invention relates to a process for the treatment of fly ash accumulating in the electro-filter of the soda recovery unit in a sulfate cellulose mill, the ash containing primarily Na sulfate, Na chloride, Na carbonate and K sulfate, to produce industrial raw materials, in which process the fly ash is dissolved in water, the carbonate present therein is broken down with hydrochloric acid to Na chloride, a sulfate precipitation chemical in chloride form is added, the sulfate precipitate obtained is separated from the solution, and the chloride-containing solution is recovered.
    Type: Grant
    Filed: October 9, 2001
    Date of Patent: November 23, 2004
    Assignee: Finnish Chemicals Oy
    Inventor: Reijo Seppänen
  • Method for regenerating a hydrogenation catalyst
    Patent number: 5674797
    Abstract: The invention relates to a method for regenerating a hydrogenation catalyst employed in the production of hydrogen peroxide, being characterized in that the catalyst to be regenerated is treated with an oxidized working solution used in the production of hydrogen peroxide.
    Type: Grant
    Filed: February 22, 1995
    Date of Patent: October 7, 1997
    Assignee: Finnish Chemicals Oy
    Inventors: Reijo Seppanen, Vesa Jokinen