Patents by Inventor Juhani Salmi

Juhani Salmi 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 the removal of metals from an aqueous solution using lime precipitation
    Patent number: 7247282
    Abstract: The invention relates to a method for the removal of metals from their aqueous solution with lime precipitation, in conditions where a precipitate of metal hydroxide and gypsum is formed, which settles well and is easy to filter. The metals are precipitated from their aqueous solutions at a high pH value and the slurry is recirculated several times in the precipitation space, whereby the gypsum is precipitated as separate crystals instead of a solid layer. The method is particularly suitable for neutralization of the aqueous solution from the pickling of refined steel. Using this method enables the removal of metals and fluoride from the water in question.
    Type: Grant
    Filed: June 14, 2002
    Date of Patent: July 24, 2007
    Assignee: Outotec OYJ
    Inventors: Bror Nyman, Stig-Erik Hultholm, Juhani Salmi, Jarmo Sivonen
  • Method for the removal of metals from an aqueous solution using lime precipitation
    Publication number: 20040195183
    Abstract: The invention relates to a method for the removal of metals from their aqueous solution with lime precipitation, in conditions where a precipitate of metal hydroxide and gypsum is formed, which settles well and is easy to filter. The metals are precipitated from their aqueous solutions at a high pH value and the slurry is recirculated several times in the precipitation space, whereby the gypsum is precipitated as separate crystals instead of a solid layer. The method is particularly suitable for neutralization of the aqueous solution from the pickling of refined steel. Using this method enables the removal of metals and fluoride from the water in question.
    Type: Application
    Filed: December 23, 2003
    Publication date: October 7, 2004
    Inventors: Bror Nyman, Stig-Erik Hultholm, Juhani Salmi, Jarmo Sivonen