Acid-gas-containing Claus sulfur recovery catalyst and preparation method thereof

Abstract

The invention relates to an acid-gas-containing Claus sulfur recovery catalyst and a preparation method thereof. The acid-gas-containing Claus sulfur recovery catalyst is characterized in that active aluminum oxide is used as carriers, ferric oxide is used as active ingredients, the ferric oxide content in the active aluminum oxide carriers is 4 to 5 percent, the alkaline earth metal content is 0.5 to 0.15 percent, and the catalyst is prepared by a twice-dipping method. The catalyst provided by the invention overcomes the defects that the existence form of iron of the traditional ferrous active aluminum oxide catalyst is indefinite or the distribution of Fe2O3 is not uniform, the impurity iron influence is caused in the preparation process, and the like. Simultaneously, the acid-gas-containing Claus sulfur recovery catalyst also has the characteristic of loading a small amount of alkaline earth metal so that the organic sulfur hydrolysis activity is overcome. In addition, compared with ordinary active aluminum oxide catalysts, the acid-gas-containing Claus sulfur recovery catalyst overcomes the defect of catalyst activity loss caused by sulfuric acid salinization poisoning because of the occurrence of trace oxygen and sulfur dioxide and overcomes the defects of small specific area, poor intensity and high performance cost of the pure titanium oxide catalysts. The HQHG-971 sulfur recovery catalyst provided by the invention can be used by full bed layers and can also be filled to a 1 / 3 position of the upper part of the ordinary aluminum oxide catalysts. The temperature use range is 180 DEG C to 400 DEG C, the hydrolysis rates of COS and CS2 respectively reach 99 percent and 70 percent, and the highest temperature resistance is 700 DEG C.

Description

technical field [0001] The invention relates to a preparation method of a Claus sulfur recovery catalyst used for acid gas. It is a sulfur recovery catalysis and preparation method with high strength, high Claus activity and good anti-oxidation performance. Background technique [0002] The Claus sulfur recovery process originated in the 1980s. Since the realization of industrialization in the 1930s, it has been widely used in the processing of coal, oil, and natural gas such as the production of synthetic ammonia and methanol feed gas, refinery gas processing, and natural gas purification. H produced during the desulfurization process 2 The recovery of sulfur from S gas can not only obtain good economic benefits, but also solve the problem of industrial waste gas pollution to the atmosphere. Claus process is characterized by simple process, flexible operation, high purity of recovered sulfur, low investment cost, remarkable environmental and scale benefits. The purity of...

AI Technical Summary

Problems solved by technology

Research and industrial practice show that the activated alumina catalyst is limited by the operating conditions, and the operating flexibility is small, and it is easy to be poisoned by sulfation and the activity will decrease rapidly.

[0012] Titanium-based catalysts have better performance, but are expensive, have low strength and high wear

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