Residual oil hydrotreating-catalytic cracking-solvent refining combined process

A technology of residual oil hydrogenation and solvent refining, which is applied in the fields of hydrotreating process, petroleum industry, processing hydrocarbon oil, etc., can solve the problems of large amount of coke, low yield of light oil, increased load of regenerator, etc.

Inactive Publication Date: 2012-12-12
PETROCHINA CO LTD
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Problems solved by technology

Since the heavy cycle oil contains 35-60% polycyclic aromatic hydrocarbons, the yield of light oil is low and the amount of co

Method used

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  • Residual oil hydrotreating-catalytic cracking-solvent refining combined process
  • Residual oil hydrotreating-catalytic cracking-solvent refining combined process
  • Residual oil hydrotreating-catalytic cracking-solvent refining combined process

Examples

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[0043] Example

[0044] The residue is introduced into the residue hydrotreating unit for hydrotreating, and the hydrogenated product is separated to obtain gas, hydrogenated naphtha, hydrogenated diesel oil and hydrogenated residue; the hydrogenated residue is directly\or and optionally gas oil Enter the catalytic cracking unit together, and the products are separated into dry gas, catalytic gasoline, catalytic diesel, heavy cycle oil and oil slurry; the heavy cycle oil and slurry solvent are refined, and the extracted oil is treated to remove solid impurities and enters the residue together with the residual oil. In the oil hydrotreating unit, the raffinate oil and the hydrogenated residue together enter the catalytic cracking unit for reaction.

[0045] From Table 3, it can be known that compared with the comparative example, the yield of hydrogenated diesel oil increased by 0.51%. After 2000 hours, the coke deposit on the catalyst was significantly reduced. The operation period...

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Abstract

The invention relates to a residual oil hydrotreating-catalytic cracking-solvent refining combined process. Residual oil and hydrogen enter a residual oil hydrotreater to perform hydrogenation reaction, hydrogenated residual oil enters a catalytic cracking unit to continue to react, catalytic cracking heavy cycle oil obtained through the reaction and slurry oil are subjected to solvent refining, solvent refining extract oil returns to the residual oil hydrotreater after solid impurities are removed, then the solvent refining extract oil and the residual oil enter the device together to be subjected to hydrotreating, residual refining extract oil returns to the catalytic cracking unit, and then the residual refining extract oil and the hydrogenated residual oil enter the catalytic cracking unit to continue to react. By means of the method, residual oil is converted into light oil products with high added value as far as possible, and the operating condition of the residual oil hydrotreater is improved.

Description

technical field [0001] The invention relates to a combined process of residual oil hydrogenation treatment, catalytic cracking and solvent refining. Background technique [0002] At present, the world's oil refining and processing industry is facing the severe challenge of increasingly heavy and inferior crude oil resources. In 2008, my country's crude oil processing volume was 342 million tons, of which heavy crude oil processing volume reached 137 million tons, accounting for more than 40% of the total. As we all know, the proportion of residual oil in crude oil is usually 45-75%, and its properties are significantly inferior to fractions such as gas oil with a lower boiling range. Therefore, the pressure for deep processing of crude oil to maximize the production of light products and chemical raw materials naturally falls on on the residual oil. [0003] Among the optional technical routes for deep processing of residual oil, the combined process of residual oil hydrog...

Claims

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Application Information

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IPC IPC(8): C10G69/00
Inventor 崔瑞利赵愉生马安程涛于双林赵元生谭青峰周志远范建光张春光那美琦刘元东张志国
Owner PETROCHINA CO LTD
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