Title:
METHOD FOR PRODUCING ALKYLENE OXIDE ADDUCT
Document Type and Number:
WIPO Patent Application WO/2013/073665
Kind Code:
A1
Abstract:
The present invention provides a method for producing an alkylene oxide adduct, comprising the steps of: (A) adding an aqueous organic carboxylic acid solution to a crude alkylene oxide adduct while keeping the temperature at 90 to 130˚C inclusive to adjust the pH value of the crude alkylene oxide adduct to 5 to 7 as measured at a concentration of 5 mass% and at 25˚C, wherein the crude alkylene oxide adduct is produced by adding an alkylene oxide to a compound containing active hydrogen and/or a fatty acid alkyl ester in the presence of a solid catalyst for alkoxylation purposes; and (B) adjusting the water content in the crude alkylene oxide adduct of which the temperature is adjusted to 50 to 80˚C to 8 to 12 mass% inclusive.
According to the present invention, it becomes possible to separate and remove the catalyst and a polyalkylene glycol that is a by-product of the reaction from the alkylene oxide adduct with high efficiency.
Inventors:
NAGAMOTO SHINOBU (JP)
ITO YUTAKA (JP)
OSAKO HITOSHI (JP)
ITO YUTAKA (JP)
OSAKO HITOSHI (JP)
Application Number:
PCT/JP2012/079779
Publication Date:
May 23, 2013
Filing Date:
November 16, 2012
Export Citation:
Assignee:
LION CORP (JP)
International Classes:
C08G65/30
Domestic Patent References:
| WO2008078768A1 | 2008-07-03 |
Foreign References:
| JP2010006964A | 2010-01-14 | |||
| JPS56112931A | 1981-09-05 | |||
| JP2005314617A | 2005-11-10 | |||
| JP2005187415A | 2005-07-14 | |||
| JPH08268919A | 1996-10-15 |
Attorney, Agent or Firm:
TSUJII Koichi et al. (JP)
辻居 Koichi (JP)
辻居 Koichi (JP)
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Claims: