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Anhydrous indium chloride synthesizing method

A synthesis method and technology of indium chloride, applied in chemical instruments and methods, inorganic chemistry, chloride preparation and other directions, can solve the problems of low product purity, low yield, yellowing of crystals, etc., and achieve high purity and high yield Effect

Active Publication Date: 2010-08-04
SHAOGUAN JINYUAN INDAL
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Problems solved by technology

However, when the above-mentioned traditional methods are used to prepare anhydrous indium chloride, there are the following disadvantages: complex equipment, low yield, serious pollution, difficult practical application and production, and staying in the experimental stage, the resulting product has a low purity, High impurity index, yellow crystal, etc.

Method used

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  • Anhydrous indium chloride synthesizing method

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Embodiment Construction

[0012] Below in conjunction with accompanying drawing and embodiment the present invention is further described: see figure 1 , a kind of anhydrous indium chloride synthesis method, its processing step is:

[0013] One is pretreatment: take 25 kg of 5N high-purity metal indium, put it in a vacuum quartz furnace, put it in a quartz container coated with graphite composite material, and then vacuumize it. After the negative pressure is stable, gradually increase the temperature to 700- 1200°C, keep the temperature and negative pressure conditions unchanged for one hour, after the pretreatment, close the vacuum valve, pass high-purity argon after cooling, and take out the metal indium from the vacuum operating room under the protection of argon and seal it for storage.

[0014] The second is vacuum chlorination: 25 kg of pretreated high-purity indium ingots are put into the vacuum reaction furnace, packed in a quartz container coated with graphite composite material, vacuumized a...

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Abstract

The invention relates to an anhydrous indium chloride synthesizing method. The method adopts the following process steps: pre-treatment, vacuum chlorination, sublimation and purification, and formation of a finished anhydrous indium chloride product. According to the method, the high-purity anhydrous indium chloride is synthesized by adopting totally nontoxic agents and raw materials by using vacuum high-temperature chlorination and distilled purification technology; the product has high purity, high yield and no toxicity; by detecting the synthesized high-purity anhydrous indium chloride product, the impurity content is below 5ppm, and the purity reaches above 99.995 percent; and the trace impurity produced in the synthesizing process is blown out in a form of dust and then is hydrolyzed and absorbed under the sealed condition, the liquid enters an indium metal reclaiming link, the process flow avoids toxic agents, and the product is further purified by the unique vacuum sublimation technology.

Description

【Technical field】 [0001] The invention belongs to the technical field of chemistry and chemical engineering, and relates to a method for synthesizing high-purity anhydrous indium chloride by vacuum chlorination of indium ingots. 【Background technique】 [0002] High-purity anhydrous indium chloride is the basic raw material for the synthesis of organic indium series compounds, and can also be used as a catalyst for organic reactions. It is also widely used in organic synthesis and electronics industry. At present, high-purity anhydrous indium chloride is mainly used in the production of LED core chips, which belongs to the cutting-edge technology field of energy-saving semiconductor electronic lighting, and is an irreplaceable core raw material of LED representing cutting-edge lighting technology. [0003] LED is a light-emitting diode. It is an electronic component made of semiconductor material that can emit light when it is energized. It uses a solid semiconductor chip to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G15/00C01B9/02
Inventor 王东伟
Owner SHAOGUAN JINYUAN INDAL
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