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A combined process method of residual oil hydrotreating-catalytic cracking

A catalytic cracking and hydrotreating technology, applied in hydrotreating process, hydrocarbon oil treatment, petroleum industry, etc., can solve problems such as unfavorable device stable operation, unable to fundamentally change the pressure drop growth trend of pre-reactor

Active Publication Date: 2018-11-06
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 combined process method of residual oil hydrotreating-catalytic cracking
  • A combined process method of residual oil hydrotreating-catalytic cracking
  • A combined process method of residual oil hydrotreating-catalytic cracking

Examples

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Effect test

Embodiment 1

[0071] The hydrogenation pretreatment reactor A, hydrogenation pretreatment reactor B, and hydrogenation pretreatment reactor C residual oil feedstock described in Example 1 all adopt raw material A. The properties are shown in Table 1, and all the catalytic cracking diesel oil in the catalytic cracking unit is All are recycled to the hydrogenation pretreatment reaction zone, and the properties are shown in Table 2. Among them, the proportion of FCC diesel allocated to hydropretreatment reactor A is 10%, the proportion of FCC diesel allocated to hydropretreatment reactor B is 30%, and the proportion of FCC diesel allocated to hydropretreatment reactor C is 10%. The ratio is 60%. 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 hydrogenation pretreatment reactor A, Catalysts in Hydrogenation Pretreatment Reactor B, Hydrogen...

Embodiment 2

[0073] In Example 2, the residual oil raw material B is used in the hydrogenation pretreatment reactor A, the hydrogenation pretreatment reactor B, and the hydrogenation pretreatment reactor C, and all the catalytic cracking diesel oil in the catalytic cracking unit is recycled to The hydrogenation pretreatment reaction zone, wherein the hydrogenation pretreatment reactor A, the hydrogenation pretreatment reactor B, and the hydrogenation pretreatment reactor C are allocated to obtain the same proportion of catalytic cracking diesel oil. 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 reactor is 0.44h -1 . The hydrogenation pretreatment reactor A, hydrogenation pretreatment reactor B, and hydroge...

Embodiment 3

[0075] 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. Recycle all the catalytic cracking diesel oil in the catalytic cracking unit to the hydrogenation pretreatment reaction zone, in which the hydrogenation pretreatment reactor A, hydrogenation pretreatment reactor B, and hydrogenation pretreatment reactor C are all allocated to get the same proportion catalytic cracking diesel. 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 A, hydrogenation pretreatment reactor B, hydrogenation pretreatment reactor The same catalyst loading method was adopted in the hydrogen p...

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Abstract

The invention discloses a residual oil hydrotreating-catalytic cracking combined process method which includes a hydropretreating reaction zone, a hydrotreating reaction zone and a catalytic cracking reaction zone; the process method includes the following contents: a residual oil raw material, at least part of a catalytic cracking diesel oil fraction and hydrogen are mixed, and in turn pass through the hydropretreating reaction zone and the hydrotreating reaction zone which are in series connection, after gas-liquid separation of a hydrotreating reaction zone reaction effluent, a gas phase is recycled back to the hydropretreating reaction zone and / or the hydrotreating reaction zone, a liquid phase directly enters the catalytic cracking reaction zone for catalytic cracking reaction, a catalytic cracking reaction effluent is separated to obtain a dry gas, liquefied gas, a catalytic cracking gasoline fraction, a catalytic cracking diesel oil fraction, catalytic cracking heavy cycle oil and catalytic cracking oil slurry, and the catalytic cracking diesel oil is partially or totally recycled back to the hydrotreating reaction zone for hydrotreating reaction. The method can prolong the stable operation period of a device.

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): C10G69/00
CPCC10G69/00
Inventor 刘铁斌耿新国翁延博李洪广
Owner CHINA PETROLEUM & CHEM CORP
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