Method for preparing anhydrous gallium trichloride through chlorination method

An anhydrous gallium trichloride, gallium trichloride technology, applied in chemical instruments and methods, inorganic chemistry, gallium/indium/thallium compounds, etc., can solve the problem of low gas utilization rate, blockage of collection pipes, slow reaction speed, etc. It can avoid the blockage of the collection pipeline, save energy and facilitate the collection.

Inactive Publication Date: 2016-05-11
NANJING JINMEI GALLIUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The disadvantage of the existing technology is that the hydrogen chloride gas or chlorine gas reacts with the surface of liquid metal gallium, the reaction speed is slow, the efficiency is low, the utilization rate of the gas is low, and most of the gas needs to be exhausted; the whole reaction process needs continuous heating. To ensure the smooth progress of the reaction; during the collection of solid-state gallium trichloride, the problem of blockage of the collection pipe is prone to occur

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Example 1: First, liquid metal gallium is added to the reactor, and then chlorine gas is directly introduced into the liquid metal gallium, the reaction temperature is controlled at 80° C., and the liquid gallium trichloride produced by the reaction is collected into a packaging bottle. At the beginning of the reaction, gallium metal needs to be heated to a liquid state and kept at 45°C. The reaction temperature was controlled by controlling the rate of chlorine gas injection and the temperature of the water bath. The upper part of the reactor is provided with a diversion port. As the reaction proceeds, the liquid gallium trichloride produced by the reaction floats on the liquid metal gallium, and more and more liquid gallium trichloride is produced by the reaction. Flow out into the bottle. Since the temperature of the reactor is controlled at 80° C., the liquid gallium trichloride produced becomes turbid, that is, part of the gallium trichloride turns into a solid st...

Embodiment 2

[0012] Example 2: It differs from Example 1 in that at the beginning of the reaction, metal gallium needs to be heated to a liquid state and maintained at 50°C, and the reaction temperature is controlled at 90°C. Due to the low temperature of the reactor, the gallium trioxide liquid produced becomes turbid, that is, part of the gallium trichloride turns into a solid state. It shows that the low reaction temperature is unfavorable for the output of gallium trichloride to flow out from the diversion port.

Embodiment 3

[0013] Example 3: It differs from Example 1 in that at the beginning of the reaction, metal gallium needs to be heated to a liquid state and maintained at 55°C, and the reaction temperature is controlled at 100°C. The reaction temperature is controlled by controlling the injection rate of chlorine gas and air cooling. The produced liquid gallium trichloride is clear and transparent, and is easy to flow out from the diversion port.

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Abstract

The invention discloses a method for preparing anhydrous gallium trichloride through a chlorination method. The method comprises the following steps of adding liquid metal gallium into a reactor; then directly pumping chlorine gas into the liquid metal gallium; controlling the reaction temperature to be 80 DEG C to 200 DEG C; collecting liquid gallium trichloride produced through reaction in a packaging bottle. According to the method disclosed by the invention, the chlorine gas is directly pumped into the liquid metal gallium, so that the reaction efficiency is high, the utilization rate of the chlorine gas is high, waste gas produced through the reaction is less, and industrial production is easy.

Description

technical field [0001] The invention relates to a method for preparing gallium trichloride, in particular to a method for preparing anhydrous gallium trichloride by a chlorination method. Background technique [0002] Anhydrous gallium trichloride, molecular formula: GaCl 3 , white needle crystal, density 2.47g / cm 3 (25°C). The melting point is 78°C and the boiling point is 201.3°C. It is easy to deliquesce in the air, easy to oxidize, and easy to dissolve in water. The preparation of anhydrous gallium trichloride needs to be carried out under a very dry and inert protective gas condition. [0003] A common method for preparing anhydrous gallium trichloride: in an anhydrous dry quartz tube, a container containing liquid metal gallium is placed in the quartz tube, and when the temperature is higher than 200°C, hydrogen chloride gas or chlorine gas is passed into the Into the quartz tube, a small part of hydrogen chloride gas or chlorine gas reacts with the surface of liq...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G15/00
CPCC01G15/00
Inventor 刘文兵唐治国
Owner NANJING JINMEI GALLIUM
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