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Heavy oil hydrogenation process

A heavy oil hydrogenation and process technology, which is applied in the fields of hydrogenation treatment process, petroleum industry, hydrocarbon oil treatment, etc., can solve the problems of temperature rise and large radial temperature difference of the reactor, etc.

Active Publication Date: 2022-05-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention solves the problem of high temperature in the early stage of the reaction and large radial temperature difference of the reactor in the process of heavy oil liquid phase hydrogenation by mixing and dissolving the heavy oil raw material and hydrogen, and at the same time controlling the flow path of the feed in the reactor, ensuring a higher reaction rate in the middle stage conversion rate, reduce the deep cracking reaction in the later stage, and increase the liquid yield

Method used

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Effect test

Embodiment 1

[0046] Attached figure 1 In the described method, the first hydrogenation catalyst filled in the inner cylinder of the fixed-bed hydrogenation reactor adopts the FZC protective agent / FF-46 catalyst developed by Fushun Petrochemical Research Institute, wherein the FZC protective agent is 15% of the total catalyst volume of the outer cylinder. %, the second hydrogenation catalyst filled in the annular area adopts the 3936 catalyst developed by Fushun Petrochemical Research Institute.

[0047] The hydrogen contained in the first mixed feed is 3.66% of the mass of feedstock oil (the sum of fresh feedstock oil and cycle oil); sum) 9.28% of the mass; the circulation ratio is 2.5.

[0048] The reaction conditions of the inner cylinder of the hydrogenation reactor are as follows: the reaction temperature is 384-401°C, the reaction pressure is 15.0MPaG, and the liquid hourly volume space velocity is 2.8h -1 ;The reaction conditions in the annular area of ​​the hydrogenation reactor a...

Embodiment 2

[0052] Attached figure 1 In the described method, the first hydrogenation catalyst filled in the inner cylinder of the reactor adopts the FZC protective agent / 3996 catalyst developed by the Fushun Petrochemical Research Institute, wherein the FZC protective agent is 15% of the total catalyst volume of the outer cylinder, and the annular area is filled with The second hydrogenation catalyst adopts the 3936 catalyst developed by Fushun Petrochemical Research Institute.

[0053] The hydrogen contained in the first mixed feed is 5.40% of the mass of the raw material oil (the sum of fresh raw oil and circulating oil); and) 7.74% of the mass; the cycle ratio is 2.0.

[0054] The reaction conditions of the inner cylinder of the hydrogenation reactor are as follows: the reaction temperature is 382-401°C, the reaction pressure is 15.0MPaG, and the liquid hourly volume space velocity is 2.2h -1 ;The reaction conditions in the annular area of ​​the hydrogenation reactor are as follows:...

Embodiment 3

[0058] Attached figure 1 In the described method, the first hydrogenation catalyst filled in the inner cylinder of the reactor adopts the FZC protective agent / FF-46 catalyst developed by the Fushun Petrochemical Research Institute, wherein the FZC protective agent is 15% of the total catalyst volume of the outer cylinder, and the annular area The filled second hydrogenation catalyst adopts FF-16 catalyst developed by Fushun Petrochemical Research Institute.

[0059]The hydrogen contained in the first mixed feed is 7.66% of the mass of raw material oil (the sum of fresh raw oil and circulating oil); and) 5.28% of the mass; the cycle ratio is 2.0.

[0060] The reaction conditions of the inner cylinder of the hydrogenation reactor are as follows: the reaction temperature is 385-403°C, the reaction pressure is 15.0MPaG, and the liquid hourly volume space velocity is 2.0h -1 ;The reaction conditions in the annular area of ​​the hydrogenation reactor are as follows: the reaction t...

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Abstract

The invention discloses a heavy oil hydrogenation process which comprises the following steps: (1) mixing hydrogen and a heavy oil raw material to obtain a first mixed feed; (2) the first mixed feed enters the shell side of the shell-and-tube inorganic membrane tube assembly from the bottom of the fixed bed reactor, and hydrogen is supplemented to enter the tube side to form a second mixed feed; and (3) enabling the second mixed feed to flow upwards into the upper cylinder, alternately carrying out hydrogenation reaction on the inner cylinder and the annular region under the action of a plurality of partition plates axially arranged in the inner cylinder and the annular region, and finally enabling a hydrogenation product to flow out from the upper part. The method solves the problem of large temperature rise in the early reaction stage of the heavy oil liquid phase hydrogenation process, ensures high conversion rate in the middle reaction stage, reduces the later deep cracking reaction, and improves the liquid yield.

Description

technical field [0001] The invention belongs to the field of petrochemical industry, and in particular relates to a heavy oil hydrogenation process. Background technique [0002] The hydrogenation process of heavy oil generally adopts fixed bed, suspension bed, ebullating bed and other hydrogenation processes, among which the fixed bed hydrogenation process is the most widely used and can be used in various types of heavy oil hydrogenation processes. The currently widely used reaction form is gas / liquid / solid three-phase hydrogenation process. [0003] Compared with the traditional fixed-bed gas / liquid / solid three-phase hydrogenation process, the liquid-phase hydrogenation process has many advantages such as fast hydrogenation reaction rate, high reaction efficiency, low energy consumption, and low investment, and has been widely recognized. Therefore, the upflow liquid phase hydrogenation reaction process combines the advantages of both the upflow hydrogenation reactor and...

Claims

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Application Information

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IPC IPC(8): C10G65/02
CPCC10G65/02C10G2300/4006C10G2300/4012C10G2300/4018C10G2300/70Y02P20/52
Inventor 翁延博杨秀娜袁胜华耿新国刘铁斌李洪广
Owner CHINA PETROLEUM & CHEM CORP
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