Method for producing water-absorbent resin powder, and drying device and drying method for particulate hydrous gel

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United States of America Patent

PATENT NO 11766659
APP PUB NO 20190329220A1
SERIAL NO

16349758

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Abstract

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The production method includes a drying step of drying a particulate crosslinked hydrogel polymer obtained by polymerizing a monomer, which is a material of a water-absorbent resin, using a heating device to obtain dried particles. The heating device includes: a rotary container that contains the particulate crosslinked hydrogel polymer therein and rotates; and a plurality of heating tubes that are located within the rotary container, extend in an axial direction of the rotary container, and rotate together with the rotary container. A gel temperature of the particulate crosslinked hydrogel polymer to be subjected to the drying step, the gel temperature being measured by a contact thermometer, is not lower than 50° C.

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Patent Owner(s)

Patent OwnerAddress
NIPPON SHOKUBAI CO LTDOSAKA-SHI OSAKA 541-0043

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Fujino, Shin-ichi Himeji, JP 17 256
Honda, Koji Himeji, JP 42 275
Imura, Motohiro Himeji, JP 24 614
Ishizaki, Kunihiko Himeji, JP 116 2443
Katsube, Shin-ya Himeji, JP 5 11
Sato, Mai Himeji, JP 10 14
Shobo, Yoshihiro Himeji, JP 8 29
Shuto, Tokio Suita, JP 4 16
Wakabayashi, Ryota Himeji, JP 13 38
Watabe, Hiroyasu Himeji, JP 5 22

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