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Nitrile-containing organic waste gas purification catalyst and preparation method thereof

A technology for purifying catalysts and organic waste gas, which is used in catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., to achieve the effects of simple preparation process, high catalyst activity, and long service life

Pending Publication Date: 2021-04-13
HANGZHOU YIN LI ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved in the present invention is to provide an organic waste gas purification catalyst with simple production process, high activity and long service life and a preparation method thereof, aiming at the shortcomings of the existing nitrile-containing organic waste gas treatment technology and catalyst and its preparation method, A catalyst can be used to treat nitrile-containing organic waste gas

Method used

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  • Nitrile-containing organic waste gas purification catalyst and preparation method thereof
  • Nitrile-containing organic waste gas purification catalyst and preparation method thereof
  • Nitrile-containing organic waste gas purification catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Weigh alumina, silica, CeO 2 , ZrO 2 , with Bi 2 o 3 Calculated Bi(NO 3 ) 3 The solution is 133.3g of alumina, 13.33g of silicon dioxide, and CeO calculated at a mass ratio of 1:0.1:0.2:0.1:0.1 2 (26.66g), ZrO 2 (13.33g), Bi(NO 3 ) 3 solution (with Bi 2 o 3 13.33g) mixed and stirred evenly with 1400g water and stirred evenly, after the solution was ball milled for 2 hours, adjusted to pH=2.0-2.5 with nitric acid to prepare A solution; weigh CeO 2 , ZrO 2 , La 2 o 3 , Cu(NO 3 ) 2 , with MnO 2 Calculated Mn(NO 3 ) 2 CeO with a mass ratio of 1:0.1:0.1:2:0.3 2 (28.57g), ZrO 2 (2.86g), La 2 o 3 (2.86g), Cu(NO 3 ) 2 (57.14g containing CuO), Mn(NO 3 ) 2 (with MnO 2 After the solution prepared for 8.57g) was stirred evenly, it was mixed with 1500g water and stirred evenly, after the solution was ball milled for 2 hours, it was adjusted to pH=2.0~2.5 with nitric acid to prepare B solution; weigh Cu(NO 3 ) 2 Solution (83.33g containing CuO), Mn(NO 3 )...

Embodiment 2

[0014] With the same preparation method of Example 1, the difference is that the content of CuO in each liter of prepared catalyst is doubled, the content of noble metals Pt and Pd is doubled, the catalyst activity evaluation conditions are the same as in Example 1, and the catalyst activity evaluation results See Table 2.

[0015]

Embodiment 3

[0017] Using the same preparation method as in Example 1, the difference is that the CuO content per liter of the prepared catalyst is reduced by 50%, and the catalyst activity evaluation conditions are the same as in Example 1, and the catalyst activity evaluation results are shown in Table 3.

[0018]

[0019] It can be seen that the catalyst of the present invention has a high conversion rate for simulated organic waste gas, a high selectivity for converting CN bonds into N2, and a good catalytic effect. The catalytic performance of Example 2 is better than that of the other two examples. The present invention has simple process , The characteristics of the prepared catalyst are high activity.

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Abstract

A nitrile-containing organic waste gas purification catalyst is characterized in that the catalyst is prepared by taking cordierite honeycomb ceramic as a main carrier, and coating a first coating, a second coating, a third coating and a fourth coating, wherein the first coating is Al2O3, SiO2, CeO2, ZrO2 and Bi2O3, and the loading capacity is 20 g / L; the second coating is prepared from CeO2, ZrO2, La2O3, CuO and MnO2, and the loading capacity of the second coating is 10 g / L; the third coating is CuO and MnO2, and the loading capacity is 10 g / L; and the fourth coating is CuO, MnO2, Pt and Pd, and the loading capacity is 3g / L. The method has the characteristics of simple preparation process, high catalyst activity and the like.

Description

technical field [0001] The invention relates to a nitrile-containing organic waste gas purification catalyst and a preparation method thereof, which is particularly suitable for the purification and treatment of acrylonitrile, hydrocyanic acid, acetonitrile and other organic waste gases, and belongs to the technical field of catalysts. Background technique [0002] Due to the high toxicity of the nitrile-containing organic waste gas discharged from petrochemical, pharmaceutical chemical, electronic industry and other industries, the national emission index requirements and the national environmental protection emission index requirements are high, so the pollution control problem is a key point and a difficulty in the current organic waste gas treatment. . The national environmental protection emission index puts forward very high emission index requirements for the main organic compounds containing CN bonds, such as the emission index of acrylonitrile is 0.5mg / m 3 , the in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J37/02B01J23/89B01D53/72B01D53/86
CPCB01D53/8668B01D2257/70B01D2258/02B01J23/8986B01J37/0215B01J37/0228
Inventor 韦军
Owner HANGZHOU YIN LI ENVIRONMENTAL PROTECTION TECH