Heavy slag oil fixed bed hydrogenating treatment process

Abstract

The invention relates to a residual oil fixed bed hydrogenating process, arranging denitrogenation catalyst between hydrodesulfation and hydrodenitrogenation catalysts of the routine fixed bed hydrogenating process, the aperture of the residual carbon hydro-removal catalyst is larger than that of the hydrodesulfation catalyst, the activity of the residual carbon hydro-removal catalyst is higher or equivalent to that of the hydrodesulfation catalyst, and the residual carbon hydro-removal catalyst and the hydronitrogenation catalyst form a stage bed with gradually decreasing aperture and gradually increasing activity. It can effectively convert fragrant macromolecular components such as asphalt, heavy colloid, etc, and remove the impurities. It can be used in the process of fixed bed hydrogenation of various heavy and residual oils.

Description

technical field [0001] The invention belongs to the treatment technology of heavy oil in the petroleum processing process, specifically a heavy oil hydrogenation treatment process, relates to a fixed bed hydrogenation upgrading and conversion process suitable for heavy oil, including a variety of catalysts Bed graded heavy oil hydroprocessing technology. Background technique [0002] In the hydrotreating process of heavy and residual oil, the impurity content of raw materials is very high, especially the organometallic compounds such as oil-soluble nickel and vanadium, which have a strong poisoning effect on hydrodesulfurization and denitrogenation catalysts. Various methods for removing such impurities from feedstocks have been proposed to protect downstream highly active hydrodesulfurization and denitrogenation catalysts. For example, US Pat. No. 4,447,314 proposes a process for hydrotreating residual oil with a double catalyst bed system. The first catalyst used in the p...

AI Technical Summary

Problems solved by technology

However, the disadvantage of the existing technology is that the level of impurity removal is not high, especially in the removal of heavy metals and reduction of residual carbon value.

Therefore, it is impossible to increase the activity of the protection catalyst and the demetallization catalyst, otherwise a large amount of impurities will be deposited here quickly, clogging the catalyst bed and forcing production interruption, which is not desirable in the nature of the fixed bed hydrogenation process

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