Metal contaminating and water thermal aging method for catalytic cracking catalyst

Abstract

The invention relates to a metal contaminating and water thermal aging method for a catalytic cracking catalyst. The method comprises the steps that firstly, under the lifting action of oxygen-containing gas, the catalytic cracking catalyst is conveyed in a lifting pipe from bottom to top; secondly, hydrocarbon oil containing a metal organic compound is sprayed into the lifting pipe for combustion, and the catalytic cracking catalyst is subjected to heavy metal contaminating; thirdly, the catalytic cracking catalyst obtained after heavy metal contaminating enters an aging device from the top of the lifting pipe; fourthly, with a fluidizing agent, the catalytic cracking catalyst obtained after heavy metal contaminating is subjected to water thermal aging in the aging device. The method is efficient, stable and capable of well simulating the nature of an industrial poiser.

Description

technical field [0001] The invention relates to a treatment method for catalytic cracking catalysts in the field of petroleum processing, in particular to a metal pollution and hydrothermal aging method for catalytic cracking catalysts. Background technique [0002] Catalytic cracking is an important secondary processing process and an effective means of lightening heavy oil. The main raw material is low-quality heavy oil, while the products are high value-added liquefied gas, gasoline, diesel, etc. Catalysts play an important role in product yield, smooth operation of equipment, and environmental protection. Due to the high activity of the fresh catalyst, direct use will cause negative effects such as an increase in coke production in catalytic cracking products and a decrease in gasoline octane number. Therefore, laboratory research work, whether it is process development, catalyst development and evaluation, or industrial raw materials Performance investigation, etc., a...

AI Technical Summary

Problems solved by technology

The operation steps of this method are relatively cumbersome, the smell is large and pollutes the environment when the solvent is impregnated, the drying process is slow and the organic solvent is easy to burn at high temperature

Simultaneously, also have following weak point from the result: (1) metals such as nickel, vanadium are evenly distributed on the catalyst, and the active non-gradient distribution of metals such as nickel, vanadium, can't well simulate nickel, vanadium on the industrial balance agent, Inhomogeneous deposition of metals such as vanadium and its gradient distribution of activity; (2) vanadium on the catalyst exists in the form of the most mobile and destructive +5-valent compound; (3) passivation by antimony is often not observed , so it is difficult to investigate the performance of the passivating agent; (4) due to the lack of sulfur competition in the test process, the reaction performance of the vanadium catching agent cannot be accurately inspected

This method can effectively solve the problem of metal distribution on the catalyst and the age gradient of the metal, but the catalyst treatment cycle is long, the reaction regeneration process is relatively complicated, and the economy, convenience, and environmental protection are poor.

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