Method for preparing magnesium oxide crystal whiskers from brine through hydrothermal-basic magnesium chloride precursor

The technology of magnesium oxide whisker and magnesium chloride is applied in the field of marine chemical industry, and can solve the problems of poor quality of magnesium oxide whisker, difficulty in realizing industrialization, complicated process, etc., and achieve the effects of good appearance, low production cost and simple process method.
CN109355703APending Publication Date: 2019-02-19TIANJIN SEA WATER DESALINATION & COMPLEX UTILIZATION INST STATE OCEANOGRAPHI
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
TIANJIN SEA WATER DESALINATION & COMPLEX UTILIZATION INST STATE OCEANOGRAPHI
Publication Date
2019-02-19

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Abstract

The invention discloses a method for preparing magnesium oxide crystal whiskers from brine through a hydrothermal-basic magnesium chloride precursor. The method includes the following steps of 1) selecting a brine raw material; 2) purifying brine raw materials; 3) adding absolute ethyl alcohol; 4) reacting crystallization; 5) conducting a hydrothermal reaction; 6) preparing precursor basic-magnesium-chloride crystal whiskers; 7) preparing the magnesium oxide crystal whiskers. According to the method for preparing the magnesium oxide crystal whiskers from the brine through a hydrothermal-basicmagnesium chloride precursor, the brine serves as the raw material, it is achieved that brine chemical resources are extracted and recycled, and meanwhile environment pollution caused by brine discharging is reduced; the technology method is simple, the production cost is low, and the magnesium oxide crystal whiskers prepared with the method are good in crystalline form and high in purity.
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Description

technical field

[0001] The invention belongs to the technical field of marine chemical industry, in particular to a method for preparing magnesium oxide whiskers from brine by using a hydrothermal-basic magnesium chloride precursor. Background technique

[0002] Magnesium oxide whiskers are a kind of inorganic whisker materials with great development potential. Compared with silicon carbide whiskers, silicon nitride whiskers, and potassium titanate whiskers, the raw materials for preparing magnesium oxide whiskers are cheap and easy to obtain. . In particular, MgO whiskers have a high melting point and are not oxidized at high temperatures, making them have broad application prospects in the field of high-temperature composite materials. As a new multifunctional inorganic material, magnesium oxide whisker has good heat resistance (melting point as high as 2850°C), insulation, stability, and thermal conductivity (three times the thermal conductivity of alumina) among many ma...

Claims

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