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A method for producing chlorine by oxidation of hydrogen chloride

A hydrogen chloride, catalytic oxidation technology, applied in chlorine/hydrogen chloride, chlorine/hydrogen chloride purification, chemical instruments and methods, etc., can solve the problems of danger, increased oxygen, high energy consumption, etc., to reduce energy consumption and improve safety. Effect

Active Publication Date: 2022-03-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cryogenic separation method consumes a lot of energy, especially for the separation effect of chlorine / oxygen mixed gas with low oxygen content.
Chlor-alkali enterprises or chlorine-containing product manufacturers usually have high requirements on the purity of chlorine gas when using chlorine gas, especially the limit of oxygen impurity content in chlorine gas is very strict, because most of the reactions that chlorine gas participates in are organic reactions, and the reactants exist in different degrees. The explosion limit, the presence of oxygen increases the hazard of the process

Method used

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  • A method for producing chlorine by oxidation of hydrogen chloride

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Open hydrogen chloride on-off valve 13 and oxygen on-off valve 12, simultaneously hydrogen chloride and oxygen enter the fixed bed 14 of hydrogen chloride oxidation unit from pipeline 1 and 2 respectively, the ratio of the amount of hydrogen chloride / oxygen substance is 4:1, and total space velocity is 2000h -1 , in Cu-La-K-O / Al 2 o 3 (Cu:La:K= 5:2:1, the active component accounts for 10% of the mass of the catalyst) react on the catalyst, the reaction temperature is 300°C, 0.5MPa; the tail gas after the reaction passes through the gas-liquid separator 16, and the gas passes through the valve 8 Enter the deaerator (17 or 18), in the deaerator Cu-Zn-Ce-Zr-O / Al 2 o 3 (Cu:Zn:Ce:Zr=3:1:2:1, the active component accounts for 10% of the mass of the oxygen scavenger), the reaction temperature is 50°C, and the air inlet space velocity is 500h -1 Enter 23 in the saturated sodium chloride solution through valve 19 or 20 after deoxygenation, enter 24 in the desiccator that anhy...

Embodiment 2

[0030]Open hydrogen chloride on-off valve 13 and oxygen on-off valve 12, simultaneously hydrogen chloride and oxygen enter the fixed bed 14 of hydrogen chloride oxidation unit from pipeline 1 and 2 respectively, the ratio of the amount of hydrogen chloride / oxygen substance is 5:1, and total space velocity is 1500h -1 , in Cu-La-K-Zr-Ga-O / Al 2 o 3 (Cu:La:K:Zr:Ga=6:3:2:1:0.3, the active component accounts for 15% of the mass of the catalyst) reacts on the catalyst, the reaction temperature is 350°C, 0.3MPa; the tail gas after the reaction passes through the gas-liquid Separator 16, the gas enters the deaerator (17 or 18) through the valve 8, and in the deaerator Cu-Zn-Ce-Zr-O / Al 2 o 3 (Cu:Zn:Ce:Zr=3.5:1.2:2.5:1.2, the active component accounts for 15% of the mass of the oxygen scavenger), the reaction temperature is 80°C, and the air inlet space velocity is 800h -1 Enter 23 in the saturated sodium chloride solution through valve 19 or 20 after deoxygenation, enter 24 in the d...

Embodiment 3

[0033] Open hydrogen chloride on-off valve 13 and oxygen on-off valve 12, simultaneously hydrogen chloride and oxygen enter the fixed bed 14 of hydrogen chloride oxidation unit from pipeline 1 and 2 respectively, the ratio of the amount of hydrogen chloride / oxygen substance is 6:1, and total space velocity is 1500h -1 , in Cu-La-K-Zr-Ga-O / Al 2 o 3 (Cu:La:K:Zr:Ga=7:3:2:1.5:0.5, the active component accounts for 18% of the mass of the catalyst) reacts on the catalyst, the reaction temperature is 350°C, 0.1MPa; the tail gas after the reaction passes through the gas-liquid Separator 16, the gas enters the deaerator (17 or 18) through the valve 8, and in the deaerator Cu-Zn-Ce-Zr-O / Al 2 o 3 (Cu:Zn:Ce:Zr= 3.8:1.4:2.8:1.4, the active component accounts for 20% of the mass of the oxygen scavenger), the reaction temperature is 100°C, and the air inlet space velocity is 800h -1 Enter 23 in the saturated sodium chloride solution through valve 19 or 20 after deoxygenation, enter 24 in ...

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Abstract

The invention belongs to the technical field of chlorine resource recycling, and in particular relates to a method for producing chlorine gas by oxidation of hydrogen chloride. Hydrogen chloride and oxygen pass through the hydrogen chloride catalytic oxidation unit, oxygen removal unit, hydrogen chloride removal unit and drying unit in sequence. The catalyst active component used in the hydrogen chloride catalytic oxidation unit is a composite oxide Cu-X-K-Zr-Ga-O, wherein X is at least one of light rare earth elements, and the oxygen scavenger active group used in the oxygen removal unit Divided into Cu‑Zn‑Ce‑Zr‑O. The technology of the invention can obtain chlorine gas with high space-time yield and high purity, and the method is easy to operate and easy to industrialize.

Description

technical field [0001] The invention belongs to the technical field of chlorine resource recycling, and in particular relates to a method for producing chlorine gas by oxidation of hydrogen chloride. Background technique [0002] Chlorine gas is commonly used as a disinfectant for drinking water, but it is also used in the manufacture of tens of millions of other products. As an important chemical raw material, it is applied to automobiles, construction, crop protection, electronics, space shuttle, medicine and manufacturing. Chlorine chemistry plays an important role in improving human health and safety and enhancing human quality of life. The source of chlorine gas is mainly through chlor-alkali technology. The chlor-alkali industry uses electrolysis of saturated saline solution to produce chlorine gas, caustic soda and hydrogen. The balance of chlorine and alkali is the key to the development of chlor-alkali industry. my country's chlor-alkali industry has now begun a n...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B7/04C01B7/07
CPCC01B7/04C01B7/0743C01B2210/0045C01P2006/80
Inventor 于杨陈海波魏士新殷玉圣
Owner CHINA PETROLEUM & CHEM CORP