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A method for treating residual oil

A technology for residual oil and hydrotreating, which is applied in the treatment of hydrocarbon oil, hydrotreating process, petroleum industry, etc. It can solve the problems of unfavorable device stable operation and unable to fundamentally change the pressure drop growth trend of the pre-reactor

Active Publication Date: 2018-03-16
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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
  • A method for treating residual oil
  • A method for treating residual oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] The raw material A (see Table 1 for properties) described in Example 1 was used to obtain light fractions and heavy fractions through separation, and the cut point was 600°C. The heavy fraction is processed through a coking unit, and then separated to obtain coked gasoline, coked diesel oil, coked wax oil and coke. The operating conditions of coking are: reaction temperature 505°C, pressure 170000Pa.

[0077] The coker wax oil and light fraction, 50% of the catalytic cracking diesel oil recycled from the catalytic cracking unit and all the catalytic cracking heavy cycle oil are sent to the hydrogenation pretreatment reaction zone. 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, Hydrogenation Pretreatment Reactor C, and Hydrotre...

Embodiment 2

[0079] In Example 2, the properties of the raw material B used are shown in Table 1. After separation, the light fraction and the heavy fraction were obtained, and the cut point was 610°C. The heavy fraction is processed through a coking unit, and then separated to obtain coked gasoline, coked diesel oil, coked wax oil and coke. The operating conditions of coking are: reaction temperature 505°C, pressure 170000Pa.

[0080] Send coker wax oil and light fraction, 30% catalytic cracked diesel and all catalytic cracked heavy cycle oil to the hydrogenation pretreatment reaction zone. The total catalyst loading and feed properties of the hydrogenation pretreatment reactor A, hydrogenation pretreatment reactor B, and hydrogenation pretreatment reactor C are exactly the same, and the feed space velocity is different. The hydrogenation pretreatment reactor The hourly volume space velocity of liquid A is 0.20h -1 , the hourly volumetric space velocity of liquid B in the hydrogenation ...

Embodiment 3

[0082] In Example 3, raw materials A, B, and C were separated to obtain light fraction and heavy fraction, and the cut point was 600°C. The heavy fractions of raw materials A, B, and C are respectively processed through a coking unit, and then separated to obtain coked gasoline, coked diesel oil, coked wax oil and coke. The operating conditions of coking are: reaction temperature 505°C, pressure 170000Pa.

[0083] The hydrogenation pretreatment reactor A adopts the light fraction of raw material A and the coker gas oil of A, the hydrogenation pretreatment reactor B adopts the light fraction of raw material B and the coker gas oil of B, and the hydrogenation pretreatment reactor C adopts Feedstock C Light Ends and C Coker Wax Oil. 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, hydro...

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Abstract

The invention discloses a method for treating residual oil. A coking device, a hydrogenation pretreatment reaction area, a hydrogenation treatment reaction area and a catalytic cracking reaction area are provided, the method comprises the following steps: performing fractionation on a residual oil raw material so as to obtain light fraction and heavy fraction, feeding the heavy fraction into the coking device for treatment so as to obtain coked gasoline, coked diesel oil and coked wax oil, mixing the light fraction with the coked wax oil and hydrogen, passing through the hydrogenation pretreatment reaction area and the hydrogenation treatment reaction area which are connected in series, performing gas-liquid separation on a reaction effluent of the hydrogenation treatment reaction area, circulating vapor phase back to the hydrogenation pretreatment reaction area and / or the hydrogenation treatment reaction area, directly feeding liquid phase into the catalytic cracking reaction area for a catalytic cracking reaction, and separating a catalytic cracking reaction effluent, thereby obtaining a dry gas, a liquefied gas, catalytic cracking gasoline fraction, catalytic cracking area diesel oil fraction, catalytic cracking area recirculation oil and catalytic cracking area oil slurry. By adopting the method disclosed by the invention, the stable operation period 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 coking-hydrogenation-catalytic cracking combined 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....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G69/00
CPCC10G69/00C10G2300/1007
Inventor 刘铁斌耿新国翁延博李洪广
Owner CHINA PETROLEUM & CHEM CORP
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