US Patent Issued to Metsa Fibre on June 17 for "Method of replacing sodium losses in a pulp mill, a method of producing bleached cellulosic pulp, and a system" (Finnish Inventors)

ALEXANDRIA, Va., June 19 -- United States Patent no. 12,331,460, issued on June 17, was assigned to Metsa Fibre Oy (Metsa, Finland).

"Method of replacing sodium losses in a pulp mill, a method of producing bleached cellulosic pulp, and a system" was invented by Ari Poukka (Metsa, Finland) and Veli-Pekka Tervola (Helsinki).

According to the abstract* released by the U.S. Patent & Trademark Office: "According to an example aspect of the present invention, there is provided a method of replacing with sodium make-up chemicals sodium losses caused by outflows in a pulp mill which employs a kraft process for producing cellulosic pulp, wherein the pulp mill includes a unit for conversion of sulphurous compounds, which is fed with sulphurous subs...