Method for preparing magnesium borohydride by solution method

The solution method for preparing magnesium borohydride solves the problems of high energy consumption, high cost and high safety risks in existing technologies, and achieves low-temperature hydrogen release and simplified process, making it suitable for large-scale industrial production.

CN121247722APending Publication Date: 2026-01-02XIAN TECH UNIV
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Patent Information

Application Number
CN202511295140.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-09-11
Publication Date
2026-01-02

AI Technical Summary

Technical Problem

Existing magnesium borohydride synthesis technologies suffer from high energy consumption, high costs, high operational safety risks, and high hydrogen release temperatures of the products, making them unsuitable for large-scale industrial production.

Method used

Magnesium borohydride was prepared by a solution method. The solution was prepared in an inert atmosphere glove box with MgCl2/tetrahydrofuran and NaBH4/isopropylamine. After mixing, the solution was centrifuged and vacuum desolventized, avoiding high temperature and high pressure ball milling and simplifying the process.

Benefits of technology

It significantly reduces energy consumption and preparation costs, improves operational safety, and lowers the initial hydrogen release temperature of the product to 115.8℃, making it suitable for large-scale production.

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Abstract

The invention discloses a method for preparing magnesium borohydride by a solution method, and relates to the technical field of hydrogen storage materials. The method comprises the following steps: dissolving MgCl2 in tetrahydrofuran to form a magnesium source solution, dissolving NaBH4 in isopropylamine to form a boron-hydrogen source solution, mixing the two solutions, and stirring to react; carrying out centrifugation and microfiltration membrane suction filtration separation on the reacted mixture to remove solid impurities so as to obtain a clarified filtrate; and carrying out vacuum desolventizing treatment on the filtrate to finally obtain solid magnesium borohydride. The method is simple in process flow, can be completed under mild conditions, and has the advantages of low raw material cost and high operation safety; the prepared magnesium borohydride product has excellent performance of lower initial hydrogen desorption temperature, and the temperature is only 115.8 DEG C. The method is especially suitable for large-scale industrial production.
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