Poor residuum hydroconversion method

Abstract

The present invention provides a residuum hydrocracking method, which adopts a pipe-in-pipe tye reactor, the top of internal pipe is equipped with gas-liquid separator, firstly, the raw material and hydrogen gas are fed into internal pipe reaction section in the upward-flowing mode, then they are separated at the upper gas-liquid separator place, the gas phase can be discharged from the reactor, and the liquid phase can be fed into the ring pipe reaction section together with added hydrocarbon oil containing more heavy aromatics, at the same time the hydrogen gas is added in the bottom of ring pipe reaction section. Said invention is mainly applicable to the hydrogenation cracking reaction of the heavy oil and residuum, specially applicable to the hydrogenation cracking reaction of poor heavy oil and residuum.

Description

1. Technical field [0001] The invention relates to a method for hydrocracking of heavy and residue oil, in particular to a method for hydrocracking of residue oil carried out in a slurry bed reactor. 2. Background technology [0002] The residual oil slurry bed reactor hydrocracking process technology can deeply convert inferior heavy residual oil to produce lighter secondary processing raw materials, and the product distribution of the device can be changed flexibly. At present, the slurry bed hydrogenation process uses a fine powder or liquid homogeneous catalyst (or additive) mixed with the feedstock oil and then enters the reactor in an upflow form together with hydrogen to complete the hydrothermal cracking reaction. The difference lies in the used different coking inhibitors and / or catalysts. [0003] Additives that inhibit coking reactions or remove coke from the reactor have been investigated. The addition of coal or coal-based additives to reduce coke deposits dur...

AI Technical Summary

Problems solved by technology

The cracking direction in the cracking reaction of residual oil is mainly the alkyl side chain and cycloalkane ring cracking of alkanes and aromatics to generate alkanes and small molecule aromatics. When the alkanes and small molecule aromatics in the residue stream no longer maintain The stable colloidal state of the asphaltene will break the adsorption balance and move the balance towards the micelles, resulting in the loss of the peptized state of asphaltene and the formation of flocculated coagulants. , the result will increase the amount of coking in the reactor and affect the operating life of the device

In addition, if the alkanes and small molecular aromatics produced in the cracking reaction of residual oil are not removed from the reactor in time, they will further undergo cracking reactions to generate smaller molecules or even dry gas, which will reduce the value of distillate oil. and increased hydrogen consumption

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