公开(公告)号：WO2015007953A1

公开(公告)日：2015-01-22

申请号：PCT/FI2014/050572

申请日：2014-07-11

Applicant: STORA ENSO OYJ

Inventor： HILTUNEN, Jaakko ,  HEISKANEN, Isto ,  SAXELL, Heidi ,  KAHELIN, Jukka ,  SAHARINEN, Erkki

IPC: D21H11/20 ,  C08B15/02 ,  C08B15/04 ,  C08B15/08 ,  C08L1/02 ,  D21C9/00 ,  D21H11/18

CPC classification number: D21H11/20 ,  C08B15/02 ,  D21C9/00 ,  D21C9/004 ,  D21C9/005 ,  D21H11/18

Abstract: The invention relates to a method of producing oxidized or microfibrillated cellulose (MFC). According to the invention there is provided an aqueous pulp suspension with a consistency of at least 15 %, and at least one oxidant is added to the suspension to oxidize cellulosic hydroxyl groups in the suspension under mechanical mixing or shearing. The oxidized suspension, washed and diluted to a lower consistency, is subjected to homogenization to yield gel-like MFC. Alkali hypochlorite may be used as oxidant, and preferred mediating oxidation catalysts are AZADO and TEMPO. Alkali bromide may be used as a cocatalyst. The MFC product, which as a suspension has an increased viscosity, is suitable as a means of regulating viscosity or for production of films and composites.

Abstract translation: 本发明涉及一种生产氧化或微纤化纤维素（MFC）的方法。 根据本发明，提供了至少15％的稠度的水性纸浆悬浮液，并且在悬浮液中加入至少一种氧化剂以在机械混合或剪切下氧化悬浮液中的纤维素羟基。 将氧化悬浮液洗涤并稀释至较低浓度，进行均化，得到凝胶状MFC。 碱性次氯酸盐可以用作氧化剂，优选的介质氧化催化剂是AZADO和TEMPO。 碱性溴化物可用作助催化剂。 作为悬浮液具有增加的粘度的MFC产品适合作为调节粘度或用于生产膜和复合材料的手段。