US 11,891,499 B2
Granular cellulose product
Juhana Ahola, Espoo (FI); Kaisa Karisalmi, Espoo (FI); Christos Rampotas, Espoo (FI); Perttu Heiska, Espoo (FI); and Mika Suvanto, Espoo (FI)
Assigned to KEMIRA OYJ, Helsinki (FI)
Appl. No. 17/261,192
Filed by KEMIRA OYJ, Helsinki (FI)
PCT Filed Jul. 19, 2019, PCT No. PCT/EP2019/069592
§ 371(c)(1), (2) Date Jan. 19, 2021,
PCT Pub. No. WO2020/038670, PCT Pub. Date Feb. 27, 2020.
Claims priority of application No. 1850925-7 (SE), filed on Jul. 19, 2018; and application No. 1850926-5 (SE), filed on Jul. 19, 2018.
Prior Publication US 2021/0269623 A1, Sep. 2, 2021
Int. Cl. C08L 1/02 (2006.01); B29B 9/12 (2006.01); C08H 8/00 (2010.01); C08L 5/06 (2006.01); C08L 5/14 (2006.01); C08L 97/00 (2006.01); C08L 97/02 (2006.01); D21H 11/18 (2006.01)
CPC C08L 1/02 (2013.01) [B29B 9/12 (2013.01); C08H 8/00 (2013.01); C08L 5/06 (2013.01); C08L 5/14 (2013.01); C08L 97/005 (2013.01); C08L 97/02 (2013.01); D21H 11/18 (2013.01)] 20 Claims
 
1. A dried, water dispersible granular microfibrillated cellulose product comprising a microfibrillated cellulose originating from agricultural biomass, said microfibrillated cellulose product comprising ≤70 wt % of cellulose 8-25 wt % hemicellulose or 8-20 wt % hemicellulose, or 8-15 wt % hemicellulose, 1-15 wt % pectin, or 1-10 wt % pectin, or 1-8 wt % pectin, 0-12 wt %, lignin, or 0-10 wt % lignin, or 0-8 wt % lignin, and 0-8 wt % protein, or 0-6 wt % protein, or 0-5 wt % protein based on dry solids content of said product,
wherein said granular microfibrillated cellulose product has
a bulk density of 500-1200 kg/m3;
an average diameter D50 of 200-6000 μm;
a flowability of 10-30 ml/s or 10-25 ml/s, measured by a Copley scientific powder flowability tester having a stainless steel cylinder with orifice 16; and
a water content of at most 30 wt %, based on the total microfibrillated cellulose product, and wherein said dried granular microfibrillated cellulose product is resistant to bacterial and fungal contamination after being stored for at least 2 weeks at temperatures of 15-25° C. without the addition of any bactericides or fungicides.