The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 27, 2009
Filed:
Dec. 07, 2001
Heljä Peltola, Pori, FI;
Pekka Taskinen, Pori, FI;
Heikki Takala, Pori, FI;
Jens Nyberg, Kokkola, FI;
Harri Natunen, Kokkola, FI;
Jorma Panula, Kokkola, FI;
Heljä Peltola, Pori, FI;
Pekka Taskinen, Pori, FI;
Heikki Takala, Pori, FI;
Jens Nyberg, Kokkola, FI;
Harri Natunen, Kokkola, FI;
Jorma Panula, Kokkola, FI;
Outotec Oyj, Espoo, FI;
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.