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Preparation method of high-purity indium triiodide

A high-purity indium triiodide technology, applied in the field of preparation of high-purity indium triiodide, to achieve high thermal efficiency, selectivity, and uniform heating

Inactive Publication Date: 2008-09-03
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Han Hanmin of Anhui Normal University once conducted InI 3 The experimental study of the preparation, that is, using iodine and indium as raw

Method used

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  • Preparation method of high-purity indium triiodide

Examples

Experimental program
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Effect test

Embodiment 1

[0011] Example 1: Take 1g of 99.99% pure metal indium and 3.316g of analytically pure iodine and mix them, put them into a quartz glass flask washed and dried by aqua regia and deionized water, and seal the quartz glass flask with a rubber stopper and vacuum glue Close the stopcock of the condensate collection tube and connect it to the vacuum pump. Insert the quartz glass flask into a 1:1 ice-salt insulation container, then open the stopcock of the condensate collection tube and vacuumize to 80kPa, then close the stopcock. Then send the vacuumed quartz glass flask device into the prepared microwave oven to start heating. The temperature in the preheating period is controlled at 20-90°C, and the time is 2 minutes; the temperature in the synthesis period is controlled at 90-200°C, and the time is 8 minutes; sublimation During the purification period, the temperature is controlled at 200-250°C for 10 minutes. When the temperature reaches 250°C, open the stopcock to sublimate the...

Embodiment 2

[0012] Embodiment 2: take 99.99% pure metal indium 5g and mix with 18.24g analytical pure iodine (10% iodine excess), the operation process after mixing is exactly the same with embodiment 1, the quartz glass flask device that will pump vacuum is sent into Start heating in the microwave oven. The temperature in the preheating period is controlled at 20-90°C for 5 minutes; the temperature in the synthesis period is controlled at 90-200°C for 9 minutes; the temperature in the sublimation purification period is controlled at 200-250°C for 15 minutes. When the synthesis temperature reaches 250°C, open the stopcock to sublimate the purified yellow InI 3 Condensate in the condensate collection tube. The purity of the product is greater than 99.99%, and its yield is 98%.

Embodiment 3

[0013] Embodiment 3: take by weighing 99.99% pure metal indium 10g and 39.79g analysis pure iodine (20% of iodine excess) mix, the operation process after mixing is exactly the same with embodiment 1, the quartz glass flask device that will pump vacuum is sent into Start heating in the microwave oven, strictly control the temperature within the range of 20-250°C, and complete the entire test within 25 minutes. At this time, the temperature in the preheating period is controlled at 20-90°C for 2 minutes; the temperature in the synthesis period is controlled at 90-200°C for 14 minutes; the temperature in the sublimation purification period is controlled at 200-250°C for 10 minutes. When the synthesis temperature reaches 250°C, open the stopcock to sublimate the purified yellow InI 3 Condensate in the condensate collection tube. The product has a purity of 99.999% and a yield of 99%.

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Abstract

The invention relates to a preparation method of high purity indium triiodide, which belongs to the technology field of rare metal fine chemical industry. The preparation method includes using the pure metal indium with the purity of 99.99-99.999% and the analytical reagent iodine as the material, adopting a manner of microwave heating and gradually heating up, ranging the temperature from 20 DEG C to 250 DEG C and obtaining the yellow high purity indium triiodide product in three steps including pre-heating, synthesizing and sublimation purificating in a controllable time within 60min. The preparation of the indium triiodide by adopting microwave heating, direct synthesizing and sublimation purificating is based on the characteristics of remarkable microwave absorption, therefore the required time is as short as one tenth of the conventional method, the production rate of the prepared indium triiodide is more than 97% and the purity is 99%-99.999%.

Description

1. Technical field [0001] The invention relates to a preparation method of high-purity indium triiodide. It belongs to the technical field of rare metal fine chemical industry. 2. Background technology [0002] The wide use of indium and its compounds has been familiar to everyone, among which high-purity indium triiodide (InI 3 ) can be used as a suitable mercury additive in the electronics, instrumentation, metallurgical industry, and optical technology. InI 3 It is used in high-pressure discharge lamps and metal halide lamps. The indium iodide high-pressure lamps produced have high luminous efficiency and good color. In recent years, due to the high efficiency and excellent color rendering performance of indium halide, high-intensity discharge, especially metal halide lamps have gradually replaced halogen lamps as high-output point light sources in various application fields, including stage lighting and TV lighting and liquid crystal projection TV light source, this ...

Claims

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Application Information

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IPC IPC(8): C01G15/00C01B9/06
Inventor 宋宁戴永年杨斌马文会姜宏伟严玉环
Owner KUNMING UNIV OF SCI & TECH
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