Title:
セルロースエーテルの製造方法
Document Type and Number:
Japanese Patent JP5030567
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 pipe type contactor to generate a contact mixture and draining the contact mixture; a method for preparing cellulose ether comprising use of the alkali cellulose; and an apparatus for preparing alkali cellulose, comprising a pipe type contactor having at least one inlet port at one end thereof for introducing pulp and an alkali metal hydroxide solution, and an outlet port at the other end for discharging a contact mixture, wherein the pulp and the alkali metal hydroxide solution are moved from one end to the other end while bringing them into contact with each other, and a drainer for separating a cake from the contact mixture discharged from the contactor.
Inventors:
Mitsuo Narita
Masaki Tabata
Atsushi Yoshida
Hiroshi Umezawa
Masaki Tabata
Atsushi Yoshida
Hiroshi Umezawa
Application Number:
JP2006332451A
Publication Date:
September 19, 2012
Filing Date:
December 08, 2006
Export Citation:
Assignee:
Shin-Etsu Chemical Co., Ltd.
International Classes:
C08B11/00; C08B1/08; C08B1/10; C08B11/08
Domestic Patent References:
| JP2003183301A | ||||
| JP2003171401A |
Foreign References:
| US20020099203 | ||||
| US3834982 | ||||
| US20040020854 |
Attorney, Agent or Firm:
Shoichi Okuyama
Arihara Koichi
Matsushima Tetsuo
Hidefumi Kawamura
Arihara Koichi
Matsushima Tetsuo
Hidefumi Kawamura