	US 12,290,796 B2
	Porous cellulose medium
Hiromichi Okura, Tokyo (JP); Toru Shibata, Tokyo (JP); and Yuki Hirabayashi, Tokyo (JP)
Assigned to DAICEL CORPORATION, Osaka (JP)
Appl. No. 17/619,250
Filed by Daicel Corporation, Osaka (JP)
PCT Filed Jun. 19, 2020, PCT No. PCT/JP2020/024057 § 371(c)(1), (2) Date Dec. 15, 2021, PCT Pub. No. WO2020/256088, PCT Pub. Date Dec. 24, 2020.
Claims priority of application No. 2019-114910 (JP), filed on Jun. 20, 2019.
Prior Publication US 2022/0258129 A1, Aug. 18, 2022
Int. Cl. B01J 20/28 (2006.01); B01D 15/34 (2006.01); B01J 2/06 (2006.01); B01J 20/24 (2006.01); B01J 20/285 (2006.01); B01J 20/30 (2006.01)

CPC B01J 20/285 (2013.01) [B01D 15/34 (2013.01); B01J 2/06 (2013.01); B01J 20/24 (2013.01); B01J 20/28004 (2013.01); B01J 20/28016 (2013.01); B01J 20/28085 (2013.01); B01J 20/3064 (2013.01)]

3 Claims

1. A porous cellulose medium comprising a porous cellulose particle having a particle size from 1 to 600 μm,

wherein, in sieving the porous cellulose medium for classification and using a fraction corresponding to aperture openings between 53 μm and 106 μm as a support for size exclusion chromatography, a polyethylene oxide standard is run through size exclusion chromatography with pure water as a mobile phase, and a weight average molecular weight Mw and a gel partition coefficient K_avof the polyethylene oxide standard satisfy Relationships (A) and (B):

in a case where 4.80≤log Mw≤5.50,K_av>−0.445×log Mw+2.55 (A)

in a case where 5.75≤log Mw,0≤K_av<0.19 (B).