	US 11,807,540 B2
	Method for preparing lithium borohydride by means of solid-phase ball milling at room temperature
Liuzhang Ouyang, Guangdong (CN); Kang Chen, Guangdong (CN); Hui Wang, Guangdong (CN); Jiangwen Liu, Guangdong (CN); and Min Zhu, Guangdong (CN)
Assigned to South China University of Technology
Appl. No. 16/977,705
Filed by South China University of Technology, Guangdong (CN)
PCT Filed Oct. 30, 2018, PCT No. PCT/CN2018/112515 § 371(c)(1), (2) Date Sep. 2, 2020, PCT Pub. No. WO2019/174245, PCT Pub. Date Sep. 19, 2019.
Claims priority of application No. 201810210745.9 (CN), filed on Mar. 14, 2018.
Prior Publication US 2021/0039947 A1, Feb. 11, 2021
Int. Cl. C01B 6/17 (2006.01)

CPC C01B 6/17 (2013.01) [C01P 2002/74 (2013.01); C01P 2002/82 (2013.01); C01P 2006/80 (2013.01)]

6 Claims

1. A method for preparing lithium borohydride by means of solid-phase ball milling at room temperature, comprising the following steps:

under room temperature and non-oxidizing atmosphere, solid-phase ball milling, separating, and purifying uniformly mixed magnesium-containing reducing agent and a lithium metaborate-based material to obtain the lithium borohydride (LiBH₄);

wherein the magnesium-containing reducing agent is one or more selected from the group consisting of magnesium, aluminum magnesium and calcium magnesium alloys;

the lithium metaborate-based material is composed of both hydrous lithium metaborate and anhydrous lithium metaborate, or the lithium metaborate-based material is hydrous lithium metaborate; and

the non-oxidizing atmosphere is an argon atmosphere or a mixed atmosphere of argon and hydrogen; the non-oxidizing atmosphere holds a pressure of 0-3 MPa.