发明名称 |
A method of producing oxidized or microfibrillated cellulose |
摘要 |
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. |
申请公布号 |
AU2014291934(A1) |
申请公布日期 |
2016.02.11 |
申请号 |
AU20140291934 |
申请日期 |
2014.07.11 |
申请人 |
STORA ENSO OYJ |
发明人 |
HILTUNEN, JAAKKO;HEISKANEN, ISTO;SAXELL, HEIDI;KAHELIN, JUKKA;SAHARINEN, ERKKI |
分类号 |
D21H11/20;C08B15/02;C08B15/04;C08B15/08;C08L1/02;D21C9/00;D21H11/18 |
主分类号 |
D21H11/20 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|