Menetelmä selluloosan katalyyttiseksi hapettamiseksi ja menetelmä selluloosatuotteen valmistamiseksi [Method for catalytic oxidation of cellulose and method for making a cellulose product]

Timo Pääkkönen (Inventor), Tapani Vuorinen (Inventor), Markus Nuopponen (Inventor)

Research output: Patent

Abstract

A method for catalytic oxidation of cellulose using a heterocyclic nitroxyl radical as catalyst, main oxidant acting as oxygen source, and an activator of the heterocyclic nitroxyl radical, comprises - a preliminary activation step of the heterocyclic nitroxyl radical with hypochlorite to activated catalyst, and after the preliminary activation step, - a cellulose oxidation step using the activated catalyst and hypochlorite as the main oxidant to oxidize cellulose. In the cellulose oxidation step, fibrous starting material is subjected to the oxidation to oxidize the cellulose, whereafter the oxidized fibrous raw material is disintegrated to nanofibrillar cellulose (NFC).
Original languageEnglish
Patent numberFI20135800
IPCD21H 11/ 18 A I,C08B 15/00 ,D21C 3/16 ,D21H 11/18,D21C 1/08,C08L 1/02 ,C07D 221/00
Priority date29/07/2013
Publication statusPublished - 30 Jan 2015
MoE publication typeH1 Granted patent

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    Pääkkönen, T., Vuorinen, T., & Nuopponen, M. (2015). IPC No. D21H 11/ 18 A I, C08B 15/00 , D21C 3/16 , D21H 11/18, D21C 1/08, C08L 1/02 , C07D 221/00 . Menetelmä selluloosan katalyyttiseksi hapettamiseksi ja menetelmä selluloosatuotteen valmistamiseksi [Method for catalytic oxidation of cellulose and method for making a cellulose product]. (Patent No. FI20135800).