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Catalyst used for catalytic oxidation of hydrogen chloride for preparing chlorine gas and preparation method thereof

A catalytic oxidation and catalyst technology, applied in the direction of chloride preparation, physical/chemical process catalyst, chlorine/hydrogen chloride, etc., to achieve good stability, improve activity and stability, and simple and easy preparation method

Inactive Publication Date: 2010-10-20
SHANGHAI CHLOR ALKALI CHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The object of the present invention is to provide a kind of catalyst and preparation method thereof for the catalytic oxidation of hydrogen chloride to produce chlorine, to overcome the deficiencies of existing copper oxide catalysts

Method used

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  • Catalyst used for catalytic oxidation of hydrogen chloride for preparing chlorine gas and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Use 56ml containing 25.33gCuCl 2 2H 2 O, 5gKCl and 7.57gCeCl 3 ·7H 2 The aqueous solution of O impregnated 70g of alumina carrier, then stirred at 40°C for 4h, stood at 30°C for 16h, dried at 100°C for 16h, and calcined at 400°C for 6h to prepare the copper chloride catalyst.

[0034] 30g cupric chloride catalyst is packed in the fixed-bed reactor, then hydrogen chloride gas and oxygen are introduced in the fixed-bed reactor with the feeding rate of 300ml / min and 150ml / min respectively, and reaction temperature is 365 ℃, reaction pressure 0.2Mpa. After 4 hours of reaction, the conversion rate of hydrogen chloride was 86.3%, and after 100 hours of reaction, the conversion rate of hydrogen chloride was 86.0%, and the activity of the catalyst remained basically unchanged.

Embodiment 2

[0036] Use 64ml containing 12.67gCuCl 2 2H 2 O, 5gKCl and 7.56gLaCl 3 ·nH 2 The aqueous solution of O impregnated 80g of alumina carrier, then stirred at 50°C for 3h, stood at 40°C for 12h, dried at 110°C for 12h, and calcined at 500°C for 4h to prepare the copper chloride catalyst.

[0037] The processing condition of catalytic reaction is identical with embodiment 1. After 4 hours of reaction, the conversion rate of hydrogen chloride was 84.8%, and after 100 hours of reaction, the conversion rate of hydrogen chloride was 84%, and the activity of the catalyst remained basically unchanged.

Embodiment 3

[0039] Use 60ml containing 12.67gCuCl 2 2H 2 O, 5gKCl and 15.09gPrCl 3 ·7H 2 The aqueous solution of O impregnated 75g of alumina carrier, then stirred at 60°C for 2h, stood at 50°C for 8h, dried at 120°C for 8h, and calcined at 600°C for 4h to prepare the copper chloride catalyst.

[0040] The processing condition of catalytic reaction is identical with embodiment 1. After 4 hours of reaction, the conversion rate of hydrogen chloride was 85.8%, and after 100 hours of reaction, the conversion rate of hydrogen chloride was 85.6%, and the activity of the catalyst remained basically unchanged.

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Abstract

The invention discloses a catalyst used for the catalytic oxidation of hydrogen chloride for preparing chlorine gas and a preparation method thereof. The catalyst comprises the following components in percentage by weight: 1 to 30 percent of CuCl2, 1 to 15 percent of KCl, 1 to 25 percent of rare earth chloride and 55 to 95 percent of carrier and is prepared by adopting an immersion method. The catalyst of the invention does not contain a toxic component Cr, belongs to an environmental-friendly low-cost catalyst and has the advantages of simple and practical preparation method, high catalyst activity, high stability and long service life.

Description

technical field [0001] The present invention relates to a catalyst for producing chlorine by catalytic oxidation of hydrogen chloride and a preparation method thereof. Catalyst for chlorine. Background technique [0002] Since Deacon proposed in 1868 to use manganese or copper salts as catalysts to oxidize hydrogen chloride gas to chlorine gas with air, the technology of hydrogen chloride catalytic oxidation to chlorine gas has attracted much attention. However, the rapid development of the chlor-alkali industry has restricted the application of the Deacon method. At present, most of the chlorine gas is produced by electrolysis of sodium chloride aqueous solution. [0003] However, as the growth rate of chlorine gas demand far exceeds that of sodium hydroxide, attention to Deacon process has increased significantly. Deacon process can avoid sodium hydroxide produced in the chlor-alkali industry and achieve a good chlor-alkali balance. A large amount of hydrogen chloride wi...

Claims

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Application Information

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IPC IPC(8): B01J27/138C01B7/04
Inventor 郭杨龙张建冯看卡袁茂全陈斌武陈江胡妹华卢冠忠
Owner SHANGHAI CHLOR ALKALI CHEM
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