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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:
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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