Process for producing anhydrous magnesium chloride by microwave energy

A technology of anhydrous magnesium chloride and magnesium chloride hexahydrate, which is applied in the direction of magnesium chloride, magnesium halide, etc., can solve the problems of uncontinuous production process, large relative material flow, and low recovery rate, and achieve simple processing, low tax water temperature, and cost reduction Effect

Inactive Publication Date: 2005-05-11
陈瑜
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  • Abstract
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Problems solved by technology

Since the activity of magnesium chloride in carnallite is smaller than that of hydrated magnesium chloride, the hydrolysis in the dehydration process is significantly reduced, which improves the quality of anhydrous magnesium chloride, but there is a large relative flow rate, high energy consumption, and the production process cannot be continuous during the electrolysis process and the recovery rate. Not advanced question

Method used

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  • Process for producing anhydrous magnesium chloride by microwave energy

Examples

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Embodiment 1

[0041] 1. Mix 200 grams of magnesium chloride hexahydrate MgCl 2 .6H 2 O is placed in a microwave heater, the container is opened and stirred, the temperature is controlled at 100°C, the exhaust machine is working, and after the two crystal waters are removed, magnesium chloride tetrahydrate MgCl is formed 2 .4H 2 O; then increase the temperature to 150°C to form magnesium chloride dihydrate MgCl 2 .2H 2 O, the process time is 5 minutes.

[0042] 2. Move magnesium chloride dihydrate into a closed microwave heater with an air inlet and outlet, add 5% dehydrating agent activated carbon of the material weight at this time, pass in chlorine gas covering the surface area of ​​the material, and heat the temperature to 230°C after fully stirring. The time course is 5 minutes, obtains electrolytic anhydrous magnesium chloride, wherein magnesium oxide MgO2 O<0.3%.

Embodiment 2

[0044] 1. Put 500 grams of magnesium chloride hexahydrate into a microwave heater equipped with a scraper for stirring and conveying, heat to 100°C with microwaves, and the exhaust machine works at the same time, and the temperature is increased to 150°C. After 5 minutes, magnesium chloride dihydrate MgCl is obtained 2 .2H 2 O.

[0045] 2. Send magnesium chloride dihydrate to a tubular microwave heater with stirring, add 4.5% dehydrating agent charcoal and 20ml chlorine gas respectively at this time, heat to 240°C by microwave, and obtain electrolytic non-alcoholic acid after 10 minutes Magnesium chloride hydrate, the content of which is MgO2 O<0.2%.

Embodiment 3

[0047] 1. Put 500 grams of magnesium chloride hexahydrate into a semicircular microwave heater with stirring, and heat it to 100°C with microwaves. The exhaust machine works at the same time, and the temperature is increased to 150°C. After 5 minutes, magnesium chloride dihydrate is obtained.

[0048] 2. Magnesium chloride dihydrate is delivered to the tubular microwave heater with stirring, and 4.5% carbon and 20ml chlorine gas of the material weight are added respectively at this time, and anhydrous magnesium chloride is obtained after 10 minutes, and the magnesium oxide content2 O<0.2%.

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Abstract

Anhydrous magnesium chloride production by microwave energy is disclosed. It is carried out by dehydrating hexhydrated magnesium chloride to obtain magnesium chloride with 1.5-2.0 water content in the first microwave heater, dehydrating hexhydrated magnesium chloride to obtain tetrahydrated magnesium chloride at temperature 100-120deg.C, dehydrating tetrahydrated magnesium chloride to obtain magnesium chloride with 1.5-2.0 water content at temperature 100-150deg.C, and realizing magnesium chloride with 1.5-2.0 water content to obtain anhydrous magnesium chloride at temperature 150-350deg.C. It achieves low dehydrating temperature and short time.

Description

Technical field [0001] The invention relates to a new production process, in particular to a new production process for preparing anhydrous magnesium chloride by microwave energy. Background technique [0002] Anhydrous Magnesium Chloride MgCl 2 It is an indispensable raw material for electrolytic preparation of magnesium metal. In the past ten years, due to the increasing demand for metal magnesium in traditional industrial application fields and new technology fields, for example, the amount of metal magnesium in the West has increased at a rate of about 5% per year, so that bischofite MgCl 2 .6H 2 O to produce high-purity anhydrous magnesium chloride MgCl 2 It has become a subject that countries all over the world have worked hard to study for many years. [0003] At present, the preparation process of anhydrous magnesium chloride includes production and development research and is roughly divided into: [0004] 1. In hydrogen chloride HCl and chlorine Cl 2 Dehydrat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F5/34
Inventor 陈瑜韩杰
Owner 陈瑜
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