US 12,172,901 B2
Method for continuously producing graphene aerogel microspheres
Shanghui Tong, Beijing (CN)
Assigned to Zhongsu New Technologies Company Limited, Beijing (CN)
Appl. No. 17/597,138
Filed by Zhongsu New Technologies Company Limited, Beijing (CN)
PCT Filed Mar. 20, 2020, PCT No. PCT/CN2020/080336
§ 371(c)(1), (2) Date Dec. 27, 2021,
PCT Pub. No. WO2020/258932, PCT Pub. Date Dec. 30, 2020.
Claims priority of application No. 201910567189.5 (CN), filed on Jun. 27, 2019.
Prior Publication US 2022/0267154 A1, Aug. 25, 2022
Int. Cl. C01B 32/184 (2017.01); C01B 32/194 (2017.01); C01B 32/198 (2017.01)
CPC C01B 32/184 (2017.08) [C01B 32/194 (2017.08); C01B 32/198 (2017.08); C01P 2004/03 (2013.01); C01P 2004/32 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A method for continuously producing graphene aerogel microspheres, which comprises:
(1) mixing graphene oxide and water to form a graphene oxide dispersion the concentration of graphene oxide in which is 3-20 mg/ml, mixing the dispersion and an alkali metal hydroxide, and ultrasonically dispersing the mixture to obtain a liquid crystal solution of graphene oxide;
(2) placing the liquid crystal solution into a slurry supply apparatus, and pressurizing the slurry supply apparatus by a pressure supply apparatus while feeding the liquid crystal solution into a calcium chloride coagulation bath by a splitter, to obtain graphene oxide microspheres after a standstill of 5-30 min;
(3) placing the graphene oxide microspheres into a solution of sodium ascorbate, and letting the reaction proceed at 60-90° C. for 5-25 hr, to obtain wet gel microspheres of graphene; and
(4) treating the wet gel microspheres of graphene to obtain graphene aerogel microspheres.