Molybdenum dioxide dichloride preparation method based on molybdenum-containing solution

By adopting a preparation method based on a molybdenum-containing solution in the preparation of dichloro-dichloro-dioxide, using pH adjustment and calcium source to generate molybdenum-containing precipitates, and obtaining high-purity molybdenum dichloride through low-temperature chlorination reaction, the problems of complex processes, polluting the environment, low safety, high energy consumption and low purity in the prior art are solved, and a simple, safe and efficient high-purity preparation is achieved.

CN119774661AActive Publication Date: 2025-04-08WUHAN UNIV OF SCI & TECH
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Patent Information

Application Number
CN202411923118.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-25
Publication Date
2025-04-08
Estimated Expiration
2044-12-25

AI Technical Summary

Technical Problem

The existing preparation methods for molybdenum dichloride dioxide have problems such as complex process flow, pollution of the environment, low safety, high energy consumption and low product purity.

Method used

Using a preparation method based on a molybdenum-containing solution, a molybdenum-containing precipitate was obtained by adding a pH adjuster to the molybdenum-containing solution and adjusting the pH to 7.5-9.0, and then adding a calcium source for stirring. Then, the chlorination reaction was carried out according to the molar ratio of molybdenum to the chlorination agent, and the reaction was carried out under a protective atmosphere at 150-180°C, and then the condensation was performed to obtain high-purity molybdenum dichloride dioxide.

Benefits of technology

The preparation of molybdenum dichloride dioxide with simple process, environmentally friendly, high safety and low energy consumption is achieved, with a product purity of ≥99%, and the efficient separation of molybdenum and impurities is completed during the preparation process.

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Abstract

The invention provides a molybdenum dioxide dichloride preparation method based on a molybdenum-containing solution. According to the technical scheme, the method comprises the following steps: adjusting the pH value of the molybdenum-containing solution to 7.5-9.0 by using a pH value regulator to obtain a treated molybdenum-containing solution; adding a calcium source into the treated molybdenum-containing solution according to the molar ratio of molybdenum to the calcium source in the molybdenum-containing solution of 1: (1.5-2.0), stirring, and carrying out solid-liquid separation to obtain a molybdenum-containing precipitate; mixing the molybdenum-containing precipitate with a chlorinating agent according to the molar ratio of molybdenum in the molybdenum-containing precipitate to the chlorinating agent of 1: (1-4) to obtain a chlorination reactant; placing the chlorination reactant in a reaction device, introducing a protective atmosphere, and reacting at 150-180 DEG C for 1-3 hours to obtain dichloromolybdenum dioxide gas; and condensing the dichloromolybdenum dioxide gas at the temperature of 0-50 DEG C to prepare the dichloromolybdenum dioxide based on the molybdenum-containing solution. The method has the characteristics of simple process, environmental friendliness, high safety and low energy consumption, and the prepared molybdenum dichloride dioxide based on the molybdenum-containing solution is high in purity.
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Citation Information

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