Title:
METHOD FOR PRODUCING AQUEOUS CELLULOSE SOLUTION AND METHOD FOR PRODUCING CELLULOSE DERIVATIVE
Document Type and Number:
WIPO Patent Application WO/2013/085053
Kind Code:
A1
Abstract:
[Problem] To provide a means which is capable of dissolving a cellulose under mild conditions using a relatively safe substance. [Solution] A method for producing an aqueous cellulose solution, which comprises a step wherein a purified cellulose or a substance containing a cellulose is brought into contact with an aqueous quaternary ammonium hydroxide solution, and which is characterized in that the total concentration of alkali metal halides and/or alkaline earth metal halides dissolved in the aqueous quaternary ammonium hydroxide solution is 1% by weight or less in a state where the aqueous quaternary ammonium hydroxide solution is in contact with the cellulose starting material. Alternatively, a method for producing an aqueous cellulose solution, which comprises a step wherein a cellulose starting material is brought into contact with an aqueous quaternary ammonium hydroxide solution, and which is characterized in that the cellulose starting material is brought into contact with the aqueous quaternary ammonium hydroxide solution in the presence of a cyclic polyether.
Inventors:
SAKAI TAKASHI (JP)
EMA TADASHI (JP)
KOHARA NORIYUKI (JP)
KOMIYAMA TAKUZO (JP)
EMA TADASHI (JP)
KOHARA NORIYUKI (JP)
KOMIYAMA TAKUZO (JP)
Application Number:
PCT/JP2012/081857
Publication Date:
June 13, 2013
Filing Date:
December 07, 2012
Export Citation:
Assignee:
DAICEL CORP (JP)
International Classes:
C08B1/00; B29C41/12; C07C209/68; C07C211/63; C08B3/06; C08B11/14; C08B11/155; D01F2/02
Foreign References:
| JP2008266625A | 2008-11-06 | |||
| JPS58151217A | 1983-09-08 |
Other References:
CELLULOSE CHEMISTRY AND TECHNOLOGY, vol. 18, 1984, pages 379 - 387
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Claims: