A high-efficiency catalytic oxidation desulfurizer and its preparation method and application

By connecting cobalt phthalocyanine on the surface of the molecular sieve and treating it with silane coupling agent, the problem of the poor removal of organic sulfide by existing dry desulfurization agents is solved, and efficient and stable purification of sulfur-containing waste gas is achieved, reducing costs and extending the life of the desulfurization agent.

CN115970759BActive Publication Date: 2025-08-12CHINA PETROLEUM & CHEMICAL CORP
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Patent Information

Application Number
CN202211326335.3
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-10-27
Publication Date
2025-08-12
Estimated Expiration
2042-10-27

AI Technical Summary

Technical Problem

The existing dry desulfurization agents are not effective in removing organic sulfides in sulfur-containing waste gas, and the metal phthalocyanine compounds are unstable in load, have short service life and high cost.

Method used

Cobalt phthalocyanine is connected by chemical bonds by modifying the surface of the molecular sieve, and the cobalt phthalocyanine is loaded on the surface of the molecular sieve by ultrasonic impregnation, and treated with silane coupling agent to improve the dispersion and stability of cobalt phthalocyanine.

Benefits of technology

It has achieved efficient removal of organic sulfur and H2S in sulfur-containing waste gas, and the total sulfur content has been reduced to within 1.0mg/Nm3, with a high penetration sulfur capacity, a long service life, and no three wastes have been generated.

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Abstract

The present invention proposes a high-efficiency catalytic oxidation desulfurizer, a preparation method and application thereof, which loads the desulfurization active component cobalt phthalocyanine onto the surface of a molecular sieve with a rich specific surface area to achieve the desulfurization of sulfur-containing waste gas. The preparation method includes three steps: activation of the hydroxyl groups on the surface of the molecular sieve, modification of the molecular sieve with a silane coupling agent, and loading the molecular sieve with cobalt phthalocyanine, and finally obtaining a high-efficiency catalytic oxidation desulfurizer loaded with cobalt phthalocyanine. The present invention modifies the molecular sieve so that the cobalt phthalocyanine is linked to the surface of the molecular sieve in the form of a chemical bond, and adopts an ultrasonic impregnation method to disperse the desulfurization active component cobalt phthalocyanine as much as possible on the surface of the adsorption desulfurizer. The desulfurizer involved in the present invention can efficiently remove sulfides such as organic sulfur and H2S from sulfur-containing waste gas, and is applied to the selective catalytic oxidation desulfurization process of sulfur-containing gas, and can reduce the total sulfur content in the sulfur-containing waste gas to 1.0 mg / Nm 3 The desulfurizer has a relatively high air velocity (0.1s ‑1 ) and penetration sulfur capacity (200-300mg / g desulfurizer), and has a long service life, good repeatability, and can be recycled.
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