Catalyst used in recycling process of Klaus sulfur

Abstract

The invention relates to a catalyst used in a recycling process of Klaus sulfur. A catalyst carrier is formed by the following steps of mixing 20 to 30 parts by weight of zirconium oxide, 20 to 30 parts by weight of titanium oxide and 30 to 50 parts by weight of silicon oxide and pressing into a spherical or lumpish primary blank; an additive containing two or more of 10 to 30 parts by weight of zinc oxide, 10 to 35 parts by weight of manganese oxide, 1 to 5 parts by weight of chrome oxide and 1 to 3 parts by weight of ferric oxide is prepared into a slurry; then the catalyst carrier is poured into the slurry to form a mixture, wherein the proportion of the additive in the catalyst carrier is 10-35%; the mixture is calcined in a 700-1,100DEG C kiln for 1 to 2 hours and then is cooled; palladium or platinum is added into a 40% ammonium nitrate solution to prepare a solution of which the concentration is 0.5-3.0mol / L; nickel is added into a 30% ammonium nitrate solution to prepare a solution of which the concentration is 1.0-4.0mol / L; the two solutions are mixed together to obtain a mixed solution; and the calcined catalyst carrier containing the additive is poured into the mixed solution to be soaked, and then is dried to obtain the catalyst. The catalyst for recycling sulfur can be used on all bed layers, and the COS and CS2 hydrolysis rate respectively reach 99% and 70%.

Description

technical field [0001] The invention relates to a catalyst, in particular to a catalyst used in the Claus sulfur recovery process. 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. The characteristics of the Claus process are simple process, flexible operation, high purity of recovered sulfur, low investment cost, significant environmental and scale benefits. The purity of sulfur recovered by the Claus process can reach 99.8%, which can be used as a sulfur resource for the production of...

AI Technical Summary

Problems solved by technology

However, research and industrial practice have shown that the currently used activated alumina catalysts are limited by operating conditions, have low operating flexibility, are prone to sulfation poisoning, and their activity quickly decreases.

[0013] Titanium-based catalysts have better performance, but are expensive, have low strength and high wear

[0014] Iron-containing alumina catalysts still have many shortcomings in terms of strength, specific surface, anti-poisoning ability, oxygen leakage and Claus activity due to different impregnation methods of different raw materials.