Title:
セルロースエーテルの製造方法
Document Type and Number:
Japanese Patent JP5030566
Kind Code:
B2
Abstract:
Provided is a method for efficiently preparing alkali cellulose having a uniform alkali distribution therein. More specifically, pulp and an excess alkali metal hydroxide solution are introduced continuously in a screw conveyor type contactor and brought into contact with each other in the screw conveyor type reactor. By changing at least one factor selected from the group consisting of a rotation speed of the screw conveyor, a screw pitch and a length of immersion zone, a ratio of an alkali to cellulose in the alkali cellulose obtained by draining is controlled. The alkali cellulose thus obtained is etherified into the corresponding cellulose ether.
Inventors:
Mitsuo Narita
Masaki Tabata
Atsushi Yoshida
Hiroshi Umezawa
Masaki Tabata
Atsushi Yoshida
Hiroshi Umezawa
Application Number:
JP2006332382A
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 | ||||
| JP2001302701A |
Foreign References:
| US20040020854 | ||||
| GB1166060A |
Attorney, Agent or Firm:
Shoichi Okuyama
Arihara Koichi
Matsushima Tetsuo
Hidefumi Kawamura
Arihara Koichi
Matsushima Tetsuo
Hidefumi Kawamura