有機酸及び排泄物の回収方法、及びリサイクルパルプ繊維の製造方法

Japanese Patent JP6598836

B2

The purpose of the present disclosure is to provide a recovery method that makes it possible to individually recover excrement and an organic acid from a deactivating aqueous solution that includes the excrement and the organic acid. This recovery method has the following features. A method for recovering excrement and an organic acid from a deactivating aqueous solution that is for use on a highly water-absorbent polymer and includes the excrement and the organic acid, the method being characterized by including: a precipitation step (S1) in which a metal salt or a base is added to the deactivating aqueous solution to precipitate a water-insoluble salt of the organic acid; a mixture collecting step (S2) in which a mixture of the water-insoluble salt of the organic acid and solid excrement that originates from the excrement is collected from the deactivating aqueous solution; an organic acid generation step (S3) in which water and an acid that can generate the free organic acid and a water-insoluble salt are added to the mixture to form an aqueous solution that includes the organic acid, the water-insoluble salt, and the solid excrement; and an organic acid aqueous solution acquisition step (S4) in which the water-insoluble salt and the solid excrement are removed from the aqueous solution to obtain an organic acid aqueous solution that includes the organic acid.

Takayoshi Konishi
Toshio Hiraoka
Takashi Kato
Kurita Noriho

JP2017212269A

October 30, 2019

November 01, 2017

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UNI-CHARM CO.,LTD.

B09B3/00; C07C51/487; C02F1/30; C02F1/32; C02F1/50; C02F1/58; C07C59/265; C08J11/06; D21C5/02

JP2016000881A
JP2016005825A
JP2002221362A

Atsushi Aoki
Shinji Mitsuhashi
Hiroyuki Onoda
Okuno Takenori
Kenji Fujimoto

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