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Method for obtaining high-purity chlorine by efficiently utilizing magnesium chloride residues in low-temperature vacuum system

A low-temperature vacuum, high-purity chlorine technology, used in the preparation of chlorides, chlorine/hydrogen chloride purification, chemical instruments and methods, etc., can solve the problems of high reaction temperature requirements, insufficient purity, slow reaction rate, etc., and achieve fast reaction rate. , Improve the purity of the product and the effect of sufficient reaction

Active Publication Date: 2019-11-26
GUIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its reaction temperature requirements are high, the reaction rate is slow, and it faces disadvantages such as insufficient purity caused by product suction

Method used

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  • Method for obtaining high-purity chlorine by efficiently utilizing magnesium chloride residues in low-temperature vacuum system
  • Method for obtaining high-purity chlorine by efficiently utilizing magnesium chloride residues in low-temperature vacuum system

Examples

Experimental program
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Effect test

Embodiment 1

[0036] Import 75kg of molten magnesium chloride waste residue into a vacuum oxidation furnace and add 0.5% catalyst for vacuum heating and oxidation. During the oxidation process, the vacuum degree is controlled to 40Pa; the oxidation temperature is 800°C; the reaction time is 20min. Pressure, the first stage pressure is 5.5MPa, the second stage pressure is 7MPa.

[0037] The oxidizing agent is ozone. The catalyst is composite active magnesium oxide.

[0038] The feed rate of the described oxidizing agent is to feed the oxidizing agent at a rate of 0.8kg / min.

Embodiment 2

[0040] Import 82.5kg of molten magnesium chloride waste residue into a vacuum oxidation furnace and add 0.5% catalyst for vacuum heating and oxidation. During the oxidation process, the vacuum degree is controlled to 75Pa; the oxidation temperature is 650°C; the reaction time is 40min. The liquefaction pressure, the first stage pressure is 6MPa, the second stage pressure is 8MPa.

[0041] The oxidizing agent is ozone. The catalyst is composite active magnesium oxide.

[0042] The feed rate of the described oxidizing agent is to feed the oxidizing agent at a rate of 0.5kg / min.

Embodiment 3

[0044] Import 90kg of molten magnesium chloride waste residue into a vacuum oxidation furnace and add 0.5% catalyst for vacuum heating and oxidation. During the oxidation process, the vacuum degree is controlled at 110Pa; the oxidation temperature is 400°C; the reaction time is 60min. In the purification device, the liquefaction temperature is controlled to be 11° C., and the liquefaction pressure is controlled. The pressure of the first stage is 6 MPa, and the pressure of the second stage is 9 MPa.

[0045] The oxidizing agent is ozone. The catalyst is composite active magnesium oxide.

[0046] The feed rate of the described oxidizing agent is to feed the oxidizing agent at a rate of 0.5kg / min.

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Abstract

The invention relates to the technical field of waste utilization, and concretely relates to a method for obtaining high-purity chlorine by efficiently utilizing magnesium chloride residues in a low-temperature vacuum system. Molten magnesium chloride residues generated in the production process of titanium sponge are introduced into an oxidation furnace under a vacuum condition, a catalyst is added, vacuum heating oxidation is carried out to make magnesium chloride fully oxidized at a low temperature, the waste heat of the molten magnesium chloride residues is efficiently utilized to reduce the energy consumption in oxidizing calcination or spray pyrolysis of magnesium chloride, and the obtained magnesium oxide has a high purity; generated mixed gas undergoes countercurrent cooling by adopting ice water, the liquefaction temperature in a purification device is controlled to be 11-13 DEG C, and it is ensured that the first-stage liquefaction pressure in the purification device is 5-6.5MPa and the second-stage pressure is 7-10 MPa, so the chlorine is fully liquefied while other gases in the mixed gas are fully separated from the chlorine, the safe production of the chlorine is guaranteed, and the high-purity chlorine liquid with the purity of 99.7% is obtained.

Description

technical field [0001] The invention relates to the technical field of waste utilization, in particular to a method for efficiently utilizing magnesium chloride slag in a low-temperature vacuum system to obtain high-purity chlorine gas. Background technique [0002] The chemical formula for chlorine gas is Cl 2 . It is yellow-green under normal temperature and pressure. It is a highly toxic gas with a strong pungent smell. It is suffocating and has a higher density than air. It is soluble in water and alkaline solutions, easily soluble in organic solvents, easy to compress, and can be liquefied into yellow-green. Oily liquid chlorine is one of the main products of the chlor-alkali industry, which can be used as a strong oxidizing agent in the production process of sponge titanium. [0003] When chlorine gas is mixed with hydrogen gas with a volume fraction of more than 5%, there may be a danger of explosion when exposed to strong light. Chlorine gas is toxic, and it mainl...

Claims

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Application Information

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IPC IPC(8): C01B7/03C01F5/02C01B7/07
CPCC01B7/03C01B7/0743C01F5/02Y02P20/129
Inventor 徐本军黄彩娟龙永富罗弦黄润吴胜财张露徐霞
Owner GUIZHOU UNIV
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