Heavy raw material boiling bed hydrogenation treatment method

Abstract

The invention relates to a heavy raw material boiling bed hydrogenation treatment method. A boiling bed hydrogenation treatment reactor is used, the heavy oil raw material oil and hydrogen gas enter a reactor from the bottom, the reaction is carried out under the heavy raw material oil hydrogenation treatment condition, materials after the reaction are discharged out from the reactor from the top, a mixed catalyst of at least two catalysts is used in the boiling bed hydrogenation treatment reactor, and the mixed volume is 1:(0.1-10). One catalyst has the properties that the specific surface is 80 to 200 mm<2> / g, the several-hole diameter can be 15 to 30nm, and holes with the hole diameter being 30 to 300nm account for 35 percent to 60 percent of the total hole volume. The other catalyst has the properties that the specific surface is 180 to 300 mm<2> / g, and holes with the hole diameters being 5 to 20nm at least account for 70 percent of the total hole volume. The method has the advantages that the operation performance of the boiling bed slag oil hydrogenation treatment process can be effectively improved, and the hydrogenation activity level and the operation flexibility are improved.

Description

technical field [0001] The invention relates to a method for hydrotreating heavy raw oil in a fluidized bed, in particular to a hydroprocessing process in a fluidized bed used for low-quality residual oil with high heavy metal content. Background technique [0002] With the gradual reduction of petroleum resources, the increasing demand for light oil and the increasingly stringent environmental regulations, the refining industry attaches great importance to the rational use of petroleum resources, which greatly promotes the development of residual oil hydroprocessing technology. The hydro-upgrading of heavy raw oil mainly includes fixed-bed, moving-bed, and ebullating-bed hydrogenation processes. In the fluidized bed hydrogenation process, the catalyst can be added and discharged online, which is conducive to maintaining high catalyst activity and long-term operation. It has strong adaptability to raw materials, flexible processing schemes, and can process inferior raw mater...

AI Technical Summary

Problems solved by technology

Although the ebullating bed reactor and method realize the use of multiple ebullating bed catalysts in one reactor, a large number of internal components are used in the reactor, which on the one hand causes complex structure and high equipment cost, and on the other hand causes the volume utilization of the reactor to be low. Low, increased reactor scale, unstable operation, etc.

Although the pore structure of ebullating bed catalysts can be adjusted using existing technologies, it is generally not easy to adjust the distribution of large pores and small pores for the same catalyst.

In addition, the hydrogenation active metal components in the large and small pores cannot be optimized and adjusted, so it is not suitable for flexible optimization of the hydrogenation performance required for different pore sizes.

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