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Purifying catalyst for gas containing cyanogen and its preparing method

A catalyst and exhaust gas purification technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve problems such as air pollution of cyanide-containing exhaust gas, and achieve low price, Lower catalytic temperature and better catalytic conversion effect

Inactive Publication Date: 2004-07-14
NO 63971 TROOPS PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the invention is to solve the air pollution problem of cyanide-containing waste gas produced in some chemical processes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] 200g of spherical SiO with a diameter of 3-5 mm 2 The granules were baked in an oven at 150°C for 3 hours for later use. 2~4g XCl (X is the transition metal element described in claim 2) 3~8g Co(NO 3 ) 2 And 5~10gCe(NO 3 ) 2 Dissolve in 50ml of water, stir until completely dissolved; put the prepared SiO 2 The carrier is added to the above solution, fully stirred, and after standing for 24 hours, it is heat-treated in an oven at 100-600° C. for 2-8 hours to prepare catalyst A.

Embodiment 2

[0012] Catalyst A made in Example 1 is placed in a quartz tube with a diameter of 4 cm, the quartz tube with catalyst A is placed in a tubular electric furnace, and the flow rate is 2 m 3 The concentration of HCN in / h is 600~800mg / m 3 Air, measure the permeation concentration and catalytic conversion rate of HCN at different temperatures, the results are shown in Table 1:

[0013] Catalytic temperature

Embodiment 3

[0015] Catalyst A prepared by embodiment 1 is used for certain factory cyanogen-containing process waste gas control, and the result of field test is as shown in table 2:

[0016] Catalytic temperature

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PUM

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Abstract

The purifying catalyst for gas containing cyanogen is granular or formed carrier made of SiO2, Al2O3, zeolite or other material and carrying soaked transition metal oxide(s) and / or RE metal oxide(s). It is prepared through soaking the carrier in water soluble transition metal oxide(s) and / or RE metal oxide(s) and subsequent drying and activating in the air at 80-600 deg.c. The catalyst can convert compound containing cyanogens in the air completely into harmless compound at 200 deg.c and may be used widely in chemical industry, environment protection and other fields.

Description

Technical field [0001] The invention relates to a catalyst for purifying cyanide-containing gas and a preparation method thereof. It can be used in the process of treating waste gas containing cyanide by catalytic combustion method. Can be widely used in chemical industry and environmental protection and other fields. Background technique [0002] In some chemical process waste gases, there are highly toxic cyanide compounds, such as hydrocyanic acid and acrylonitrile. If it is not purified and discharged directly, it will cause serious air pollution. For the treatment of similar waste gas, the direct combustion method is generally adopted abroad, but there is no patent report. The direct combustion method requires additional fuel, and the operating cost is relatively high. Some people in China have tried the liquid absorption method. The equipment of this method is relatively complicated, and it produces highly toxic cyanide-containing wastewater, and the subsequent tre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/54B01D53/86B01J23/76B01J23/85C01C3/00
Inventor 马兰赵红阳张忠良
Owner NO 63971 TROOPS PLA
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