Title:
METHOD FOR RECYCLING WATER ABSORBENT RESIN AND METHOD FOR PRODUCING WATER ABSORBENT RESIN
Document Type and Number:
WIPO Patent Application WO/2023/149573
Kind Code:
A1
Abstract:
The present invention provides: a method for producing a recycled water absorbent resin which is suppressed in coloring and decrease of the water absorption performance; and a method for producing a water absorbent resin using the same. The present invention relates to: a method for producing a recycled water absorbent resin from used absorbent articles, the method comprising a urea removal step in which urea is removed so that the urea content in a recycled water absorbent resin is 2% by mass or less, and a regeneration step in which water absorption properties are regenerated; and the like.
Inventors:
KOBAYASHI NOBUHIRO (JP)
MATSUI DAISUKE (JP)
KIMURA KAZUKI (JP)
TORII KAZUSHI (JP)
TAMAKI MARIKO (JP)
TAJIMA SHUN-ICHI (JP)
ISHIZAKI KUNIHIKO (JP)
MATSUI DAISUKE (JP)
KIMURA KAZUKI (JP)
TORII KAZUSHI (JP)
TAMAKI MARIKO (JP)
TAJIMA SHUN-ICHI (JP)
ISHIZAKI KUNIHIKO (JP)
Application Number:
PCT/JP2023/003773
Publication Date:
August 10, 2023
Filing Date:
February 06, 2023
Export Citation:
Assignee:
NIPPON CATALYTIC CHEM IND (JP)
International Classes:
B09B5/00; C08F220/06; C08J3/12; C08J3/24
Foreign References:
| JP2009073198A | 2009-04-09 | |||
| JP2021041310A | 2021-03-18 | |||
| JP3146053B2 | 2001-03-12 |
Attorney, Agent or Firm:
HARAKENZO WORLD PATENT & TRADEMARK (JP)
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