	US 12,322,772 B2
	Methods for preparing supported catalysts using waste lithium batteries and attapulgite
Xiazhang Li, Changzhou (CN); Taoli Huhe, Changzhou (CN); Jiyi Zeng, Changzhou (CN); Shixiang Zuo, Changzhou (CN); Xuhua Ye, Changzhou (CN); Xiaofei Yin, Changzhou (CN); Chao Yao, Changzhou (CN); and Haoguan Gui, Changzhou (CN)
Assigned to CHANGZHOU UNIVERSITY, Changzhou (CN)
Filed by CHANGZHOU UNIVERSITY, Jiangsu (CN)
Filed on Nov. 25, 2024, as Appl. No. 18/959,575.
Application 18/959,575 is a continuation of application No. PCT/CN2024/090548, filed on Apr. 29, 2024.
Claims priority of application No. 202311088242.6 (CN), filed on Aug. 25, 2023.
Prior Publication US 2025/0087778 A1, Mar. 13, 2025
Int. Cl. H01M 10/54 (2006.01); B01J 23/75 (2006.01); B01J 37/00 (2006.01); B01J 37/08 (2006.01); B01J 37/32 (2006.01)

CPC H01M 10/54 (2013.01) [B01J 23/75 (2013.01); B01J 37/0072 (2013.01); B01J 37/082 (2013.01); B01J 37/32 (2013.01)]

9 Claims

1. A method for preparing a supported catalyst using a waste lithium battery and attapulgite, comprising:

(a) performing pre-treatment including discharging, aluminum foil stripping, and sieving on waste lithium battery cathode material before putting into an oven for drying and spare;

(b) freeze-drying waste biomass, after removal, grinding and sieving on the freeze-dried waste biomass for spare;

(c) mixing the dried waste lithium battery cathode material in step (a) and the sieved biomass in step (b) uniformly to obtain a mixture, then putting the mixture into a tube furnace for nitrogen purging, and then heating and calcining, to obtain a solid sample after carbothermal reduction treatment;

(d) hydrothermally stirring the solid sample after the carbothermal reduction treatment, followed by filtration to recover a residue, and drying the residue to obtain a mixed sample of Co₃O₄, TiO₂, and biochar, labeled as TCO;

(e) ultrasonically dispersing the attapulgite in an acid solution for modification and stirring in a water bath at 80° C. to obtain a product, washing the product until neutral, filtering, and then drying in the oven overnight to obtain an acidified attapulgite (H-ATP); and

(f) weighing the TCO, ultrasonically dispersing the TCO in a mixed solution of deionized water and N, N dimethylformamide (DMF), adding the H-ATP into the mixed solution, and performing a microwave hydrothermal reaction, obtaining a sample after centrifuging, washing, and drying, and then performing muffle calcination on the sample to obtain a supported catalyst Co₃(Ti)O₄/H-ATP.