Title:
METHOD FOR PRODUCING DICARBOXYLIC ACID CRYSTALS
Document Type and Number:
WIPO Patent Application WO/2018/230011
Kind Code:
A1
Abstract:
Provided is a method for producing C4 dicarboxylic acid crystals having high oil absorption. This method for producing C4 dicarboxylic acid crystals comprises a step in which C4 dicarboxylic acid crystals are precipitated from an aqueous solution containing a C4 dicarboxylic acid or salt thereof in the presence of an anionic polymer. The mass ratio of the anionic polymer content to the C4 dicarboxylic acid content in the aqueous solution is 5 x 10-4 to 0.5.
Inventors:
OBUNAI RYO (JP)
NOBA MASAHIRO (JP)
IRIE YUTAKA (JP)
KOYAMA SHINGO (JP)
NOBA MASAHIRO (JP)
IRIE YUTAKA (JP)
KOYAMA SHINGO (JP)
Application Number:
PCT/JP2017/043774
Publication Date:
December 20, 2018
Filing Date:
December 06, 2017
Export Citation:
Assignee:
KAO CORP (JP)
International Classes:
C07C51/43; C07C51/353; C07C55/10; C07C57/15; C07B61/00
Foreign References:
| JPS6038453A | 1985-02-28 | |||
| JPH10273471A | 1998-10-13 | |||
| JPH05279292A | 1993-10-26 | |||
| JPS4742618A | ||||
| JP2001019998A | 2001-01-23 | |||
| JP2001511791A | 2001-08-14 | |||
| JPS415729B1 | 1966-03-29 |
Attorney, Agent or Firm:
THE PATENT CORPORATE BODY ARUGA PATENT OFFICE (JP)
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