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Residuum hydrotreatment-catalytic cracking combination technology

A technology for catalytic cracking and residual oil hydrogenation, which is applied in hydrotreating process, petroleum industry, processing hydrocarbon oil, etc., can solve the problem of inconvenient adjustment of oil properties, and achieves reduction of cold hydrogen usage, viscosity reduction, and improvement of Effect of impurity removal rate

Active Publication Date: 2014-06-04
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In the above combined methods, the re-refined oil enters the residual oil hydrotreating unit together with the raw material residual oil, and it is inconvenient to adjust according to the operating conditions of the unit and the properties of the oil product

Method used

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  • Residuum hydrotreatment-catalytic cracking combination technology
  • Residuum hydrotreatment-catalytic cracking combination technology
  • Residuum hydrotreatment-catalytic cracking combination technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The Kuwaiti residual oil and hydrogen enter the residual oil hydrogenation pilot plant together. After the residual oil hydrogenation treatment, the reaction is carried out according to the conditions in Table 1. The reaction products are separated into gas, hydrogenated naphtha, hydrogenated diesel oil, and hydrogenated residue. Oil; hydrogenated residue oil enters the catalytic cracking unit, and reacts according to the conditions in Table 1. The catalytic cracking products are divided into dry gas, liquefied gas, catalytic gasoline, catalytic diesel oil, catalytic cracking heavy cycle oil and oil slurry. 40% of the heavy circulating oil is recycled to the catalytic cracking unit and the hydrogenated residue oil enters the catalytic cracking unit for re-reaction, and 60% of the recycled oil is finely filtered and divided into four parts and hydrogen is passed through the residue hydrogenation unit. , the front inlet of the demetallization agent bed, the front inlet of ...

Embodiment 2

[0045] The Kuwaiti residual oil and hydrogen enter the residual oil hydrogenation pilot plant together. After the residual oil hydrogenation treatment, the reaction is carried out according to the conditions in Table 1. The reaction products are separated into gas, hydrogenated naphtha, hydrogenated diesel oil, and hydrogenated residue. Oil; hydrogenated residue oil enters the catalytic cracking unit and reacts according to the conditions in Table 1. The catalytic cracking products are divided into dry gas, liquefied gas, catalytic gasoline, catalytic diesel oil, catalytic cracking heavy cycle oil and oil slurry. Circulating oil, 40% of the recycled oil is recycled to the catalytic cracking unit and the hydrogenated residue oil enters the catalytic cracking unit for further reaction, 60% of the recycled oil is finely filtered, and is divided into two parts and hydrogen respectively. The front inlet of the desulfurizer bed and the front inlet of the carbon residue catalyst bed e...

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Abstract

A residuum hydrotreatment-catalytic cracking combination technology of catalytic cracking recycle oil is characterized in that a material inlet is arranged in front of a metal removal agent bed layer, a desulfurizer bed layer, and a residual carbon removal agent bed layer of a device respectively, residuum and hydrogen enter the device to react through a device raw material port, hydrogenated residuum enters a catalytic cracking device and continuously reacts, one part of the recovery oil of the catalytic cracking device enters a hydrogenation device to react through one or more of four material inlets of a hydrotreatment device, and the residual recovery oil of the catalytic cracking device is cycled to the catalytic cracking device and enters the catalytic cracking device together with the hydrogenated residuum. The technology enables the operations of the residuum hydrotreatment-catalytic cracking combination technology to be flexible and efficient, and has the advantages of prolongation of the operation period of the residuum hydrotreatment device, improvement of the impurity removal rates of residuum hydrogenation products, reduction of the application amount of cold hydrogen, and increase of the yield of light oil having high added values.

Description

technical field [0001] The invention relates to a combined process of residual oil hydrotreating and catalytic cracking. 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 hydrotreating-catalytic cracking i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G69/00
Inventor 崔瑞利赵愉生赵元生谭青峰程涛于双林刘元东张志国那美琦周志远范建光张春光
Owner PETROCHINA CO LTD
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