	US 12,071,725 B2
	Juncao pulp for spinning and preparation method and use thereof
Yueting Xie, Henan (CN); Changjin Shao, Henan (CN); Zhengfeng Zhang, Henan (CN); Faquan Yao, Henan (CN); Shanjing Xing, Henan (CN); Junjiang Xiao, Henan (CN); Yijie Hu, Henan (CN); and Kun Ding, Henan (CN)
Assigned to XINXIANG CHEMICAL FIBRE CO., LTD., Xinxiang (CN)
Appl. No. 18/263,962
Filed by XINXIANG CHEMICAL FIBRE CO., LTD., Henan (CN)
PCT Filed Mar. 20, 2023, PCT No. PCT/CN2023/082466 § 371(c)(1), (2) Date Nov. 27, 2023, PCT Pub. No. WO2024/016698, PCT Pub. Date Jan. 25, 2024.
Claims priority of application No. 202210862610.7 (CN), filed on Jul. 22, 2022; and application No. 202211048526.8 (CN), filed on Aug. 30, 2022.
Prior Publication US 2024/0084507 A1, Mar. 14, 2024
Int. Cl. D21H 11/12 (2006.01); D21B 1/02 (2006.01); D21C 3/00 (2006.01); D21C 3/02 (2006.01); D21C 3/22 (2006.01); D21C 9/14 (2006.01); D21C 9/16 (2006.01); D01D 1/02 (2006.01); D01F 1/02 (2006.01); D01F 2/00 (2006.01)

CPC D21H 11/12 (2013.01) [D21B 1/023 (2013.01); D21C 3/003 (2013.01); D21C 3/02 (2013.01); D21C 3/222 (2013.01); D21C 9/14 (2013.01); D21C 9/163 (2013.01); D01D 1/02 (2013.01); D01F 1/02 (2013.01); D01F 2/00 (2013.01); D10B 2201/01 (2013.01)]

14 Claims

1. A method for preparing a Juncao pulp for spinning, comprising:

placing a Juncao raw material in a solution prepared from a lye, a catalyst, and an auxiliary agent and cooking to obtain a cooked mixture; and

then subjecting the cooked mixture to pulping to obtain the Juncao pulp for spinning;

wherein the catalyst is a metal chloride salt, and the auxiliary agent is a polyether water-soluble organic matter and a bicarbonate;

the metal chloride salt is at least one selected from the group consisting of cobalt chloride, calcium chloride, ferric chloride, ferrous chloride, and nickel chloride;

the polyether water-soluble organic matter is polyethylene oxide;

the Juncao raw material is calculated based on a dry Juncao; the polyether water-soluble organic matter is calculated based on an active ingredient; an additive amount of the catalyst is in a range of 0.01 wt % to 0.3 wt % of the Juncao raw material; an additive amount of the bicarbonate is in a range of 0.01 wt % to 0.1 wt % of the Juncao raw material; and a volume/mass ratio of the polyether water-soluble organic matter to the Juncao raw material is in a range of (1-12)/(2-3) mL/kg.

14. A Juncao pulp for spinning prepared by the method of claim 1, wherein the Juncao pulp for spinning has a fiber viscosity of 14 mPa·s to 20 mPa·s, an α-cellulose content of not less than 91%, a pentosan content of less than 4.92%, a resin content of less than 0.13%, and a reaction performance of 0 s to 250 s; the fiber viscosity is determined by a cuprammonium method; and the reaction performance is determined by a viscose filtration method.