Method for preparing high effective sulfur transfer agent for catalytic cracking fume

Abstract

A process for preparing the efficient sulfur transferring agent used for the catalytic cracking of fume includes such steps as preparing ZnMgAlCe hydrotalcite from the active components (Zn, Mg and Al) and assistant (Ce and V) by codeposition method, preparing V-dipped ZnMgAlCo hydrotalcite by anionic exchange method, proportionally mixing it with kaolin and Al sol, grinding, vacuum drying and calcining. Its advantages are high SOx adsorptivity and desorptivity and high mechanical strength.

Description

technical field

[0001] The invention relates to a preparation method of a high-efficiency sulfur transfer agent for catalytic cracking flue gas, specifically, a method for preparing a sulfur transfer agent with zinc-magnesium-aluminum-cerium hydrotalcite as the main component. Background technique

[0002] Fluid Catalytic Cracking (FCC) is one of the main methods for producing gasoline and diesel in refinery, SO in FCC regeneration flue gas X The emissions of SO in the air account for about X 6-7% of total emissions. SOx not only seriously pollutes the environment and endangers human health, but also SO X The interaction with the water in the regenerated flue gas increases the corrosion of equipment such as FCC regenerators and three-rotation. SO reduction in FCC regenerators X The main methods of emission are: 1. Flue gas washing; 2. Hydrodesulfurization of raw oil; 3. Catalytic deSO X (sulfur transfer agent). SO removal due to catalytic method X Almost no equipment ...