Title:
METHOD FOR RECOVERING HIGHLY WATER ABSORBENT RESIN
Document Type and Number:
WIPO Patent Application WO/2021/162071
Kind Code:
A1
Abstract:
A recovery method according to the present invention comprises a sedimentation recovery step wherein after decomposing and solubilizing a highly water absorbent resin, an inorganic flocculant is added to an aqueous solution that contains the decomposition product of the highly water absorbent resin, thereby having the decomposition product of the highly water absorbent resin settled out and recovered. In the sedimentation recovery step, the aqueous solution has a pH within the range of from 2.5 to 9, and the addition amount of the inorganic flocculant is from 30 to 400% by mass relative to the solid content of the aqueous solution including the decomposition product of the highly water absorbent resin.
Inventors:
MATSUI DAISUKE (JP)
KOBAYASHI NOBUHIRO (JP)
KOBAYASHI NOBUHIRO (JP)
Application Number:
PCT/JP2021/005152
Publication Date:
August 19, 2021
Filing Date:
February 12, 2021
Export Citation:
Assignee:
NIPPON CATALYTIC CHEM IND (JP)
International Classes:
B29B17/02; B01D21/01; B09B5/00; C08J11/10
Foreign References:
| JP2019131789A | 2019-08-08 | |||
| JP2020116569A | 2020-08-06 | |||
| JP2020049398A | 2020-04-02 |
Attorney, Agent or Firm:
HARAKENZO WORLD PATENT & TRADEMARK (JP)
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