Title:
粗製ポリエーテルの精製方法および吸着剤
Document Type and Number:
Japanese Patent JP4035084
Kind Code:
B2
Abstract:
A process for purifying a crude polyether, comprising contacting a crude polyether obtained by addition polymerizing an active hydrogen-containing compound with an alkylene oxide compound in the presence of an alkali metal-containing basic catalyst to an adsorbent comprising a synthesized hydrous magnesium silicate compound which satisfies the following requirements (1) to (5) in order to reduce the alkali metal content of the crude polyether: (1) it is represented by the following formula I: (CaO)x.(MgO)y.(Al2O3)z.SiO2.mH2OI wherein x, y, z and m satisfy the following ranges: x2/g, (4) it has an alkali metal content of 0.1 wt % or less, and (5) it has an average particle diameter of 2 to 60 mum. According to the present invention, a purified polyether having an extremely low content of an alkali metal can be obtained effectively.
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Inventors:
Harumi Takahata
Tsutomu Nosu
Tsutomu Nosu
Application Number:
JP2003172078A
Publication Date:
January 16, 2008
Filing Date:
June 17, 2003
Export Citation:
Assignee:
Kyowa Chemical Industry Co., Ltd.
International Classes:
B01J20/10; C07C41/36; B01D15/00; B01J20/16; B01J20/30; C01B33/22; C07C41/03; C07C43/11; C08G65/26; C08G65/30
Domestic Patent References:
| JP7258403A | ||||
| JP5657730A | ||||
| JP4532432B1 | ||||
| JP4616A | ||||
| JP4822373A | ||||
| JP10139705A | ||||
| JP9176073A |
Attorney, Agent or Firm:
Masataka Oshima