ALEXANDRIA, Va., Feb. 24 -- United States Patent no. 12,559,885, issued on Feb. 24, was assigned to Messer Austria GmbH (Gumpoldskirchen, Austria).
"Process and apparatus for producing bleached cellulose" was invented by Bernhard Thaller (Ulmerfeld-Hausmening, Austria).
According to the abstract* released by the U.S. Patent & Trademark Office: "In a process/an apparatus for producing bleached cellulose in which a lignin- and cellulose-containing suspension is subjected to at least one process step for oxygen-assisted bleaching in a reactor, such as alkaline oxygen delignification, oxygen-enhanced extraction or oxygen-enhanced peroxide bleaching, the oxygen required for the oxygen-assisted bleaching is supplied to the reactor at least part...