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

A technology of catalyst and activated alumina, which is applied in chemical instruments and methods, sulfur preparation/purification, physical/chemical process catalysts, etc., and can solve the problems of high cost, reduced activity, and small operating flexibility

Inactive Publication Date: 2012-01-18
胡自斌
2 Cites 1 Cited by

AI-Extracted 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...
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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.

Application Domain

Sulfur preparation/purificationMetal/metal-oxides/metal-hydroxide catalysts

Technology Topic

IonActivated alumina +15

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

Examples

  • Experimental program(6)

Example Embodiment

[0020] Embodiment 1 (comparative example)
[0021] Weigh FeSO 4.7H 2 O13g is dissolved in 10ml soft water, and the pH is adjusted between 2.0-2.2. Dried at 250°C for 20g immersion solution of activated alumina carrier whose specification is ¢4-6mm, soaked for 2 hours, stirred with a glass rod once each hour, then dried at 120°C for 2 hours, and roasted at 320°C for 4 hours, that is Get sample A.

Example Embodiment

[0022] Embodiment 2 (comparative example)
[0023] Weigh FeSO 4.7H 2 O5g and 7g Fe(NO 3 ) 3.9H 2 O was dissolved in 100ml of soft water to adjust the pH between 2.0-2.2. Dried at 250°C for 20g immersion solution of activated alumina carrier whose specification is ¢4-6mm, soaked for 2 hours, stirred with a glass rod once each hour, then dried at 120°C for 2 hours, and roasted at 320°C for 4 hours, that is Get sample B.

Example Embodiment

[0024] Example 3
[0025] Weigh FeSO 4.7H 2 O12.5g is dissolved in 100ml soft water, adjust the pH between 2.0-2.2. Dried at 250°C for 20g immersion solution of activated alumina carrier whose size is ¢4-6mm, soaked for 2 hours, stirred once with a glass rod for each hour, then dried at 120°C for 2 hours, and prepared ammonia with a concentration of 2.5%. Aqueous solution, immerse the dried carrier in the solution for 2 hours, stir once every hour with a glass rod, then dry at 120°C for 2 hours, and bake at 320°C for 4 hours to obtain sample C.

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