US 12,030,960 B2
Manufacture of nanocellulose and intermediates thereof
Dongfang Li, Bromma (SE); Jonatan Henschen, Stockholm (SE); and Monica Ek, Hägersten (SE)
Assigned to FINECELLOX AB, Solna (SE)
Filed by FineCell Sweden AB, Linköping (SE)
Filed on Jul. 7, 2021, as Appl. No. 17/368,920.
Application 17/368,920 is a division of application No. 16/003,176, filed on Jun. 8, 2018, granted, now 11,084,885.
Application 16/003,176 is a continuation of application No. PCT/SE2016/051280, filed on Dec. 16, 2016.
Claims priority of application No. 1551657-8 (SE), filed on Dec. 16, 2015.
Prior Publication US 2021/0332153 A1, Oct. 28, 2021
Int. Cl. D21C 9/00 (2006.01); C08B 3/00 (2006.01); C08B 3/06 (2006.01); C08B 3/24 (2006.01); C08K 5/11 (2006.01); C08L 1/10 (2006.01); C08L 1/12 (2006.01); D21H 11/18 (2006.01); B29C 48/00 (2019.01)
CPC C08B 3/24 (2013.01) [C08B 3/00 (2013.01); C08B 3/06 (2013.01); C08K 5/11 (2013.01); C08L 1/10 (2013.01); C08L 1/12 (2013.01); D21C 9/00 (2013.01); D21H 11/18 (2013.01); B29C 48/022 (2019.02); C08L 2205/025 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A method for manufacturing nanocellulose, said method comprising the steps
of:
a. providing a cellulose-containing material wherein the cellulose-containing material contains less than 20 wt. % water,
b. contacting the cellulose-containing material with oxalic acid dihydrate, and heating above the melting point of the oxalic acid dihydrate, to obtain cellulose oxalates,
c. washing the mixture resulting from step b),
d. preparing a suspension comprising the washed material from step c), and e, recovering nanocellulose from the suspension,
wherein said nanocellulose is nanocrystalline cellulose.