Sulfur transfer catalyst and and the preparation thereof

Abstract

A sulfur-transferring catalyst comprises a cerium oxide of 2í½30úÑ by weight as the active component and a spinel compound of 70í½98úÑ by weight containing magnetium and aluminum as the carrier. The spinel compound containing magnetium and aluminum comprises MgO of 5í½70úÑ, Al2O3 of 30í½ 95%, an oxide of a rare earth element of 0í½15 úÑ except cerium, V2O5 of 0í½10úÑ,relative to the total weight of the compound. Moreover, the invention provides a method of producing the catalyst. The sulfur-transferring catalyst has a high efficiency of absorbing and desorbing SO x.

Description

technical field [0001] The invention relates to a sulfur transfer catalyst and its preparation, more specifically, a sulfur transfer catalyst containing a magnesium-aluminum spinel composition and a preparation method thereof. Background technique [0002] Fluid Catalytic Cracking (FCC) is the most important method to obtain light oil products with high use value such as gasoline and diesel oil from heavy feedstock oil. FCC units generally consist of a riser reactor and a regenerator. In the process of FCC operation, cracking catalyst microspheres with cracking activity and heavy raw oil undergo high-temperature cracking reaction in the riser reactor to generate light oil and gas products. At the same time, the cracking catalyst loses cracking activity due to coking . Deactivated cracking catalysts require regeneration. In the regenerator, the deactivated cracking catalyst is regenerated at high temperature in the presence of air. Because the coke on the surface of the c...

AI Technical Summary

Problems solved by technology

Using this method to prepare sulfur transfer catalysts, one of the disadvantages is that a large part of the active metal oxides are wrapped in the bulk phase of spinel microspheres and cannot play a catalytic role, which also reduces the SO of the sulfur transfer catalysts. x Adsorption and desorption efficiency; the second disadvantage is that too much of such metal oxides or metal salts in the slurry before spray drying will greatly reduce the wear resistance of the sulfur transfer catalyst microspheres