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Technique for producing chlorine by hydrogen chloride catalytic oxidation

A process method and catalytic oxidation technology, applied in chlorine/hydrogen chloride and other directions, can solve the problems of improving, increasing the difficulty of operation, increasing energy consumption, etc., and achieving the effects of stable operation, low operating cost and easy control

Inactive Publication Date: 2010-09-01
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in these two methods, the catalyst particles are continuously circulated between the high-temperature reaction zone and the low-temperature zone, which increases energy consumption.
In addition, the circulation of the catalyst will also increase the difficulty of operation, and the requirements for the catalyst will also increase accordingly.

Method used

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  • Technique for producing chlorine by hydrogen chloride catalytic oxidation
  • Technique for producing chlorine by hydrogen chloride catalytic oxidation
  • Technique for producing chlorine by hydrogen chloride catalytic oxidation

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach

[0031] (a) reaction raw material hydrogen chloride and oxygen (air) at first enter reactor I (1), chemical reaction takes place, the gas that flows out from reactor I condenses and removes water in water separator I (2), uncondensed gas ( Hydrogen chloride, chlorine, oxygen and other inert components) enter reactor II (3);

[0032] (b) In reactor II, hydrogen chloride and oxygen continue to react chemically, and the gas flowing out from reactor II is condensed to remove water in water separation device II (4), uncondensed gas (hydrogen chloride, chlorine, oxygen and other inert Component) enters reactor III (5);

[0033] (c) the gas flowing out from the reactor III is condensed to remove water ( image 3 ), the gas product is chlorine and unreacted hydrogen chloride and oxygen (air); or the gas flowing out from reactor III absorbs hydrogen chloride by water in the tail gas absorber (7), and the gas product is chlorine and unreacted oxygen and other inert component.

[0034]...

Embodiment 1

[0038] use as figure 1 The shown hydrogen chloride catalytic oxidation production chlorine, hydrochloric acid process. The main active component in the catalyst is copper chloride supported on alumina, and the content of copper chloride is 5%. The feed is hydrogen chloride and oxygen, the molar ratio is 1:2; the temperature in the reactor is 380°C, the pressure is 0.05MPa; the weight space velocity of hydrogen chloride is 0.3 hours -1 . The yield of product chlorine is 85%, the molar concentration of chlorine is 19.2%, the molar concentration of oxygen is 80.8%, and all unreacted HCl is absorbed as by-product hydrochloric acid.

Embodiment 2

[0040] use as figure 2 The shown hydrogen chloride catalytic oxidation production chlorine, hydrochloric acid process.

[0041] (1) Operating conditions

[0042] Catalyst is identical with embodiment 1.

[0043] Feed is hydrogen chloride and oxygen, and the molar ratio is 1: 1;

[0044] The temperature of the reactor is 390°C, and the weight space velocity of hydrogen chloride is 0.2 hours -1 ;

[0045] The bottom temperature of the water separator is 110°C and the top temperature is 35°C.

[0046] (2) Experimental results

[0047] The yield of product chlorine is 87%, the molar concentration of chlorine is 36%, the molar concentration of oxygen is 64%, and all unreacted HCl is absorbed as by-product hydrochloric acid.

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Abstract

The invention discloses a manufacturing technical method of chlorine gas through catalyzing and oxidizing hydrogen chloride in the chemical technical course domain, wherein the technical flow path is composed of multiple groups of reactor and water separating device; the hydrogen chloride and oxygen are reacted in the reactor to generate chlorine gas and water under catalyst; the gas flowed out of the reactor is condensed in the water separating device to remove water and the non-condensed gas enters next reactor; the chemical balance is broken due to removing water, which is beneficial to continuously react the non-reacted hydrogen chloride and oxygen in the next reactor; the conversion rate of hydrogen chloride or oxygen approaches 100% after multiple groups of reaction and water removing operation. The invention has high conversion rate of hydrogen chloride or oxygen, simple equipment, which stabilizes the operation with easy control.

Description

technical field [0001] The invention relates to a process method for producing chlorine gas by catalytic oxidation of hydrogen chloride, which belongs to the technical field of chemical process. Background technique [0002] In the chlor-alkali industry, chlorine and caustic soda are the two main products of the chlor-alkali industry, and the output of these two products is closely related. When the market demand for chlorine-containing products increases, the production of caustic soda will also increase. If the relationship between the two cannot be handled properly, the demand for chlorine and caustic soda will develop unbalanced, which will have a negative impact on the economic benefits and sustainable development of the chlor-alkali industry. At present, the demand for chlorine-containing products continues to grow. Simply relying on the development of the chlor-alkali industry to supplement the insufficient supply of chlorine will inevitably lead to an excess of caus...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B7/01
Inventor 韩明汉魏飞陈智涛金涌
Owner TSINGHUA UNIV