Menetelmä selluloosan katalyyttiseksi hapettamiseksi ja menetelmä selluloosatuotteen valmistamiseksi.

Timo Pääkkönen (Inventor), Taisto Tienvieri (Inventor), Isko Kajanto (Inventor), Tero Ojala (Inventor), Sami Saarela (Inventor), Markus Nuopponen (Inventor), Tapani Vuorinen (Inventor)

Research output: Patent

Abstract

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.
Original languageEnglish
Patent numberFI126847B
IPCC08L 1/04 ,C08B 15/04 ,D21H 11/18 ,D21C 3/00,D21C 9/00
Publication statusPublished - 14 Jun 2014
MoE publication typeH1 Granted patent

Keywords

  • TEMPO-mediated oxidation
  • cellulose
  • medium consistency

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