Title:
アルカリセルロース及びセルロースエーテルの製造方法
Document Type and Number:
Japanese Patent JP5052112
Kind Code:
B2
Abstract:
Provided is a method for efficiently preparing alkali cellulose having a uniform alkali distribution therein. More specifically, provided are a method for preparing alkali cellulose comprising steps of bringing pulp into continuous contact with an alkali metal hydroxide solution in a rotary feeder type contactor to generate a contact mixture, and draining the contact mixture; and a method for preparing cellulose ether comprising use of the alkali cellulose thus prepared; an apparatus for preparing alkali cellulose, comprising a rotary feeder comprising a cyclic housing comprising an inlet port and an outlet port, a cyclic contact drum being circularly rotatable along the housing in the housing and comprising a plurality of filter cells arranged in a circumferential direction, and a filtrate-discharging tube being disposed in a diameter direction inside of the cyclic contact drum and collecting the filtrate which has passed the filter, and a drainer for draining a cake discharged from the contactor.
Inventors:
Mitsuo Narita
Masaki Tabata
Atsushi Yoshida
Hiroshi Umezawa
Masaki Tabata
Atsushi Yoshida
Hiroshi Umezawa
Application Number:
JP2006332412A
Publication Date:
October 17, 2012
Filing Date:
December 08, 2006
Export Citation:
Assignee:
Shin-Etsu Chemical Co., Ltd.
International Classes:
C08B1/10; C08B11/08
Domestic Patent References:
JP2001302701A | ||||
JP2003183301A | ||||
JP2003171401A |
Foreign References:
US3322748 | ||||
US3411986 |
Attorney, Agent or Firm:
Shoichi Okuyama
Arihara Koichi
Matsushima Tetsuo
Hidefumi Kawamura
Arihara Koichi
Matsushima Tetsuo
Hidefumi Kawamura