Title:
アルカリセルロースの製造装置及びセルロースエーテルの製造方法
Document Type and Number:
Japanese Patent JP5737993
Kind Code:
B2
Abstract:
Provided is a method for efficiently preparing alkali cellulose having a uniform alkali distribution. More specifically, provided are a method for preparing alkali cellulose comprising a contact filtration step of bringing a pulp into contact with an alkali metal hydroxide solution on a moving filtration plane for vacuum filtration to collect a contact product remaining on the filtration plane, and a draining step of draining the contact product; and a method of preparing cellulose ether by using the alkali cellulose. Also provided is an apparatus for preparing alkali cellulose comprising a continuous horizontal vacuum filter type contactor comprising a horizontal filtration plane moving in a horizontal direction, a pulp inlet for introducing pulp onto the moving filtration plane, a spray port for spraying an alkali metal hydroxide solution to the introduced pulp, a vacuum pump enabling vacuum suction of the moving filtration plane, and an outlet for collecting a contact product remaining on the filtration plane after bringing the pulp into contact with the alkali metal hydroxide solution on the moving filtration plane for vacuum filtration.
Inventors:
Mitsuo Narita
Application Number:
JP2011034468A
Publication Date:
June 17, 2015
Filing Date:
February 21, 2011
Export Citation:
Assignee:
Shin-Etsu Chemical Co., Ltd.
International Classes:
C08B1/08; C08B1/10; C08B11/00
Domestic Patent References:
JP2007197678A | ||||
JP2003183301A | ||||
JP2003171401A | ||||
JP2001302701A | ||||
JP60050801B1 | ||||
JP56002302A | ||||
JP60040101A | ||||
JP3073562B2 |
Foreign References:
US2469764 |
Attorney, Agent or Firm:
Shoichi Okuyama
Arihara Koichi
Matsushima Tetsuo
Hidefumi Kawamura
Naomi Yoshida
Ayako Nakamura
Fukagawa Eri
Satoshi Morimoto
Kyoko Tsunoda
Hirose Miki
Arihara Koichi
Matsushima Tetsuo
Hidefumi Kawamura
Naomi Yoshida
Ayako Nakamura
Fukagawa Eri
Satoshi Morimoto
Kyoko Tsunoda
Hirose Miki
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