Upm-kymmene Corporation

Tero Ojala

Markus Nuopponen

Isko Kajanto

Tapani Vuorinen

Sami Saarela

Taisto Tienvieri

Timo Pääkkönen

Timo Paakkonen

Cellulose is oxidized catalytically using a heterocyclic nitroxyl radical as catalyst, main oxidant acting as oxygen source, and an activator of the heterocyclic nitroxyl radical. The oxidation is performed in a reaction medium which is at medium consistency of cellulosic pulp, which is above 6%, more preferably equal to or higher than 8%, and most preferably in the range of 8-12%. The reaction medium is mixed in a reactor through circulation of the reaction medium back to the reactor.

Method for catalytic oxidation of cellulose and method for making a cellulose product

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Oravala, Finland

Tero Ojala