Title:
PROCESS FOR PRODUCING CELLULOSE NANOFIBERS
Document Type and Number:
WIPO Patent Application WO/2010/116826
Kind Code:
A1
Abstract:
A cellulosic raw material is oxidized with an oxidizing agent in water in the presence of (1) an N-oxyl compound and (2) a bromide, an iodide, or a mixture thereof to prepare an oxidized cellulosic raw material, and the oxidized material is subjected to a viscosity reduction treatment and then to a fibrillation/dispersion treatment, thereby efficiently producing, with low energy, a high-concentration cellulose nanofiber dispersion having excellent flowability and transparency. Examples of the viscosity reduction treatment include ultraviolet irradiation, hydrolysis with cellulase and/or hemicellulase, oxidative decomposition with ozone and hydrogen peroxide, hydrolysis with an acid, and combinations of these. It is preferred to remove the N-oxyl compound from the oxidized cellulosic raw material by heating the oxidized cellulosic raw material to 50-120ºC at a pH of 3-10 and washing the resultant material with water.
Inventors:
MIYAWAKI SHOICHI (JP)
KATSUKAWA SHIHO (JP)
ABE HIROSHI (JP)
IIJIMA YUKO (JP)
ISOGAI AKIRA (JP)
KATSUKAWA SHIHO (JP)
ABE HIROSHI (JP)
IIJIMA YUKO (JP)
ISOGAI AKIRA (JP)
Application Number:
PCT/JP2010/053570
Publication Date:
October 14, 2010
Filing Date:
March 04, 2010
Export Citation:
Assignee:
JUJO PAPER CO LTD (JP)
MIYAWAKI SHOICHI (JP)
KATSUKAWA SHIHO (JP)
ABE HIROSHI (JP)
IIJIMA YUKO (JP)
ISOGAI AKIRA (JP)
MIYAWAKI SHOICHI (JP)
KATSUKAWA SHIHO (JP)
ABE HIROSHI (JP)
IIJIMA YUKO (JP)
ISOGAI AKIRA (JP)
International Classes:
D01F2/00; C08B13/00; C08B15/02; D06M10/00; D06M11/00; D06M11/34; D06M11/50; D06M15/15; D21H19/34; D06M101/06
Foreign References:
| JP2008001728A | 2008-01-10 | |||
| JP2008169497A | 2008-07-24 | |||
| JP2003516939A | 2003-05-20 | |||
| JP2003026701A | 2003-01-29 | |||
| JP2003512540A | 2003-04-02 |
Attorney, Agent or Firm:
ONO, Shinjiro et al. (JP)
Ono Shinjiro (JP)
Ono Shinjiro (JP)
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