	US 11,919,974 B2
	Oxidized cellulose, method of producing oxidized cellulose and nanocellulose, and nanocellulose dispersion
Daisuke Kamiya, Tokyo (JP); Shiroshi Matsuki, Nagoya (JP); and Jun Takada, Nagoya (JP)
Assigned to TOAGOSEI CO., LTD., Tokyo (JP)
Appl. No. 17/265,035
Filed by TOAGOSEI CO., LTD., Tokyo (JP)
PCT Filed Aug. 2, 2019, PCT No. PCT/JP2019/030392 § 371(c)(1), (2) Date Feb. 1, 2021, PCT Pub. No. WO2020/027307, PCT Pub. Date Feb. 6, 2020.
Claims priority of application No. 2018-146352 (JP), filed on Aug. 3, 2018.
Prior Publication US 2021/0301034 A1, Sep. 30, 2021
Int. Cl. C08B 15/04 (2006.01)

CPC C08B 15/04 (2013.01)

9 Claims

1. An oxidized cellulose, a ¹³C solid-state NMR spectrum of the oxidized cellulose comprising a plurality of peaks in a range of from 165 ppm to 185 ppm, wherein a content of carboxyl groups in the oxidized cellulose is from 0.55 mmol/g to 3.0 mmol/g with respect to a dry mass of the oxidized cellulose, wherein the oxidized cellulose is not an oxidized regenerated cellulose; and

wherein the oxidized cellulose is produced by a process comprising:

oxidizing a cellulose raw material with a solution prepared from a hypochlorous acid or salt thereof having an available chlorine concentration of from 7% by mass to 14% by mass, while adjusting the pH in a range of from 5.0 to 14.0, wherein the cellulose raw material is not a regenerated cellulose.