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A method for treating residual oil by hydrotreating-catalytic cracking process

A technology of catalytic cracking diesel oil and catalytic cracking oil slurry, which is applied in the field of heavy oil treatment by hydrogenation-catalysis combined process, and can solve the problems that cannot fundamentally change the pressure drop growth trend of the pre-reactor and unfavorable stable operation of the device

Active Publication Date: 2018-10-12
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method alleviates the increase in pressure drop by changing the loads of each anti-feed, but cannot fundamentally change the growth trend of the pre-reactor pressure drop. From the point of view of actual industrial operation, once the pressure drop starts to increase, it will quickly reach the design upper limit. Moreover, changing the feeding of each reverse inlet is not conducive to the stable operation of the device.

Method used

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  • A method for treating residual oil by hydrotreating-catalytic cracking process
  • A method for treating residual oil by hydrotreating-catalytic cracking process
  • A method for treating residual oil by hydrotreating-catalytic cracking process

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Embodiment 1

[0072]Hydrogenation pretreatment reactor A described in embodiment 1, hydrogenation pretreatment reactor B, hydrogenation pretreatment reactor C residual oil feed all adopt raw material A property to see table 1, the catalysis of 50% of catalytic cracking unit The cracked diesel oil and all the catalytic cracking oil slurry are recycled to the hydrogenation pretreatment reaction zone, and the properties are shown in Table 2. Among them, the catalytic cracking oil slurry is all distributed to the hydrogenation pretreatment reactor A, the proportion of the catalytic cracking diesel oil distributed to the hydrogenation pretreatment reactor B is 15%, and the proportion of the catalytic cracking diesel oil distributed to the hydrogenation pretreatment reactor C is 35%. %. The total catalyst loading, feed properties and feed amount of the hydropretreatment reactor A, hydrogenation pretreatment reactor B, and hydrogenation pretreatment reactor C are exactly the same, and the hydrogen...

Embodiment 2

[0074] In embodiment 2, in described hydrogenation pretreatment reactor A, hydrogenation pretreatment reactor B, hydrogenation pretreatment reactor C, all adopt residual oil raw material B, the catalytic cracking diesel oil of 30% with catalytic cracking unit and All the catalytic cracking oil slurry is circulated to the hydrogenation pretreatment reaction zone, in which the catalytic cracking oil slurry is all distributed to the hydrogenation pretreatment reactor A, and the proportion of catalytic cracking diesel oil distributed to the hydrogenation pretreatment reactor B is 15%. The proportion of FCC diesel to hydropretreatment reactor C is 15%. The space velocity of each reverse feed is different, and the volume space velocity of liquid A in the hydrogenation pretreatment reactor is 0.20h -1 , the hourly volumetric space velocity of liquid B in the hydrogenation pretreatment reactor is 0.32h -1 , the volumetric space velocity of liquid C in the hydrogenation pretreatment r...

Embodiment 3

[0076] In Example 3, the raw material A is used in the hydrogenation pretreatment reactor A, the raw material B is used in the hydrogenation pretreatment reactor B, and the raw material C is used in the hydrogenation pretreatment reactor C. The properties of the residual oil raw materials used are shown in the table 1. Circulate 50% of the catalytic cracking diesel oil and all the catalytic cracking oil slurry in the catalytic cracking unit to the hydrogenation pretreatment reaction zone, in which the catalytic cracking oil slurry is all distributed to the hydrogenation pretreatment reactor A and to the hydrogenation pretreatment reactor The proportion of FCC diesel in treatment reactor B is 25%, and the proportion of FCC diesel allocated to hydropretreatment reactor C is 25%. The feed amount of described hydrogenation pretreatment reactor A, hydrogenation pretreatment reactor B, hydrogenation pretreatment reactor C is the same, and described hydrogenation pretreatment reactor ...

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Abstract

The invention discloses a method for treating residual oil with hydrogenation treatment and catalytic cracking processes. A hydrogenation pretreatment reaction zone, a hydrogenation treatment reaction zone and a catalytic cracking reaction zone are contained; the method comprises steps as follows: a residual oil material and hydrogen are mixed and sequentially pass the hydrogenation pretreatment reaction zone and the hydrogenation treatment reaction zone which are connected in series; a reaction effluent in the hydrogenation treatment reaction zone is subjected to gas-liquid separation, a gas phase is recycled back to the hydrogenation pretreatment reaction zone and / or the hydrogenation treatment reaction zone, a liquid phase directly enters the catalytic cracking reaction zone for a catalytic cracking reaction, a catalytic cracking effluent is separated, and dry gas, liquefied gas, catalytic cracking gasoline fractions, catalytic cracking diesel fractions, catalytic cracking heavy cycle oil and catalytic cracking oil slurry are obtained, wherein parts of or all of catalytic cracking diesel and catalytic cracking oil slurry are recycled back to the hydrogenation treatment reaction zone for a hydrogenation treatment reaction. By means of the method, the stable operation cycle of a device can be prolonged.

Description

technical field [0001] The invention relates to a method for lightening heavy oil, in particular to a method for treating heavy oil by using a combined hydrogenation-catalysis process. Background technique [0002] At present, the demand for gasoline, coal, diesel and other oil products, especially the demand for motor gasoline in the domestic and foreign oil product markets will continue to rise, while the demand for heavy fuel oil and other heavy oil products will show a downward trend. At the same time, the properties of crude oil are deteriorating day by day on a global scale, environmental protection regulations are becoming stricter, and increasingly stringent requirements are put forward for the quality of oil products. Therefore, how to realize the lightening of heavy oil and the continuous upgrading of the quality of gasoline and diesel products at a more economical and reasonable cost has become the focus of domestic and foreign refining industries. [0003] The m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G69/04
CPCC10G69/04C10G2300/1007
Inventor 刘铁斌耿新国翁延博李洪广
Owner CHINA PETROLEUM & CHEM CORP
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