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:
Sep. 18, 2007
Filed:
Nov. 21, 2003
Magnus Ingelman, Karlstad, SE;
Jan Tjernberg, Forshaga, SE;
Anita Markusson, Molkom, SE;
Metso Fiber Karlstad AB, Karlstad, SE;
Abstract
The method is for production of green liquor in association with a causticizing process during recovery of chemicals in manufacture of sulphate pulp. A smelt () of chemicals principally consisting of Na2S and NaCOfrom a soda boiler () is provided. Weak liquor () that contains dissolved NaOH and CaO is provided. A dissolving tank () is provided in which the smelt () from the soda boiler () is dissolved in the weak liquor () it order to form green liquor (). A solution of NaOH is added to the weak liquor (), at a position before the weak liquor () is added to the dissolving tank, in order to increase the concentration of NaOH in the weak liquor () such that a fraction of CaO that is presently dissolved in the weak liquor () precipitates.