Patents by Inventor Heljä Peltola

Heljä Peltola 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 CONCENTRATING DILUTE SULFURIC ACID AND AN APPARATUS FOR CONCENTRATING DILUTE SULFURIC ACID
    Publication number: 20120067740
    Abstract: A method for concentrating dilute sulfuric acid involves feeding dilute sulfuric acid through at least two electrolytic cells depolarized by sulfur dioxide, and through a cation conductive membrane separating the cathode and anode sides in the electrolytic cell. Also provided is an apparatus for concentrating sulfuric acid, wherein at least a first electrolytic cell is in fluid communication with a second electrolytic cell, and wherein a cation conductive membrane separates the cathode and anode sides in the electrolytic cells.
    Type: Application
    Filed: May 25, 2010
    Publication date: March 22, 2012
    Applicant: Outotec OYJ
    Inventors: Michael Gasik, Anu Lokkiluoto, Heljä Peltola, Pekka Taskinen
  • Method for producing hydrogen and sulphuric acid
    Patent number: 7794685
    Abstract: The invention relates to a method for producing gaseous hydrogen and strong sulphuric acid (97-100 wt-%) simultaneously from sulphur dioxide gas and water. Sulphur dioxide gas stream is divided into two separate sub-streams, the first sub-stream is routed for water decomposition in a partial thermochemical cycle of the hydrogen and sulphuric acid production and the second sub-stream is fed to the oxidation of the sulphur dioxide to sulphur trioxide.
    Type: Grant
    Filed: January 17, 2008
    Date of Patent: September 14, 2010
    Assignee: Outotec Oyj
    Inventors: Wolf-Christoph Rauser, Michael Gasik, Heljä Peltola, Pekka Taskinen
  • METHOD FOR PRODUCING HYDROGEN AND SULPHURIC ACID
    Publication number: 20100061922
    Abstract: The invention relates to a method for producing gaseous hydrogen and strong sulphuric acid (97-100 wt-%) simultaneously from sulphur dioxide gas and water. Sulphur dioxide gas stream is divided into two separate sub-streams, the first sub-stream is routed for water decomposition in a partial thermochemical cycle of the hydrogen and sulphuric acid production and the second sub-stream is fed to the oxidation of the sulphur dioxide to sulphur trioxide.
    Type: Application
    Filed: January 17, 2008
    Publication date: March 11, 2010
    Applicant: OUTOTEC OYJ
    Inventors: Wolf-Christoph Rauser, Michael Gasik, Heljä Peltola, Pekka Taskinen
  • Method for removing mercury from gas
    Patent number: 7481865
    Abstract: The invention relates to a method for the removal of mercury from gas containing sulphur dioxide and oxygen and from the sulphuric acid vapour contained in the gas. According to the method, the gas is washed with a water solution that contains selenium ions, whereby metallic selenium is formed in the presence of oxygen, which precipitates the mercury in the gas and vapour either as a selenide or in a chlorine-containing environment, as a dichloride of mercury and selenium. Gas washing occurs at a low temperature, below 50° C.
    Type: Grant
    Filed: December 7, 2001
    Date of Patent: January 27, 2009
    Assignee: Outotec Oyj
    Inventors: Heljä Peltola, Pekka Taskinen, Heikki Takala, Jens Nyberg, Harri Natunen, Jorma Panula
  • Method for the removal of mercury from sulphuric acid with thiosulphate precipitation
    Patent number: 7452521
    Abstract: This invention relates to a method for removing mercury from dilute sulphuric acid. According to the method sulphuric acid solution is scrubbed with an aqueous solution containing thiosulphate, which precipitates the mercury present in the sulphuric acid solution either as mercury sulphide or, in a chlorine-containing environment, as a mercury sulphide-mercury chloride double salt. The quantity of thiosulphate to be fed is adjusted so that it precipitates the mercury in the sulphuric acid solution, but still does not form elemental sulphur.
    Type: Grant
    Filed: July 16, 2004
    Date of Patent: November 18, 2008
    Assignee: Outotec OYJ
    Inventors: Dag Berg, Jens Nyberg, Aija Rytioja, Heljä Peltola, Pekka Taskinen