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Combined catalytic cracking method for treating residual oil and super-heavy oil

A technology for catalytic cracking and catalytic cracking residue oil, which is applied in the treatment of hydrocarbon oil, the refining and cracking process treatment of only multi-stage series, and the petroleum industry. The problems such as the increase of coke production in the cracking unit can reduce the load of the regenerator, reduce the total carbon deposition, and reduce the residual carbon content.

Inactive Publication Date: 2017-07-21
CHINA NAT OFFSHORE OIL CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since polycyclic aromatic hydrocarbons in heavy cycle oil easily lead to an increase in the amount of coke in the catalytic cracking unit, the processing capacity of the heavy oil catalytic cracking unit is reduced, and the regenerator load is increased

Method used

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  • Combined catalytic cracking method for treating residual oil and super-heavy oil
  • Combined catalytic cracking method for treating residual oil and super-heavy oil
  • Combined catalytic cracking method for treating residual oil and super-heavy oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0083] Example 1. Using hydrotalcite with a magnesium-aluminum ratio of 2.5 as the first-stage catalytic cracking catalyst, and ultra-stable Y-type molecular sieve as the second-stage catalytic cracking catalyst, Daria vacuum residue was treated

[0084] The basic properties of Daria vacuum residue are shown in Table 1.

[0085] Table 1 Daria Vacuum Residue

[0086]

[0087] according to figure 1 The process shown is carried out, and the steps are as follows:

[0088] (1) Use dry gas to elevate the vacuum residue, and carry out one-stage catalytic cracking in the riser reactor I, where the temperature is 525°C, the catalyst-to-oil ratio is 5, and the pressure is 0.2Mpa. Then the oil and gas in the unused catalyst are stripped through the stripping section, and the oil and gas are separated from the unused catalyst in the settler I to obtain the unused catalyst and reaction oil and gas I.

[0089] The catalyst to be regenerated enters the regenerator Ⅰ through the incline...

Embodiment 2

[0107] Example 2, using hydrotalcite with a magnesium-aluminum ratio of 3 as the first-stage catalytic cracking catalyst, and rare earth Y molecular sieve as the second-stage catalytic cracking catalyst, treating Penglai vacuum residue

[0108] The basic properties of Penglai vacuum residue are shown in Table 6.

[0109] Table 6 Penglai vacuum residue

[0110]

[0111]

[0112] according to figure 1 The process shown is carried out, and the steps are as follows:

[0113] (1) Use dry gas to lift the vacuum residue, and carry out one-stage catalytic cracking in the riser reactor I, where the temperature is 530°C, the catalyst-to-oil ratio is 6, and the pressure is 0.2Mpa. Then the oil and gas in the unused catalyst are stripped through the stripping section, and the oil and gas are separated from the unused catalyst in the settler I to obtain the unused catalyst and reaction oil and gas I.

[0114] The catalyst to be regenerated enters the regenerator Ⅰ through the incl...

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Abstract

The invention discloses a combined catalytic cracking method for treating residual oil and super-heavy oil. The method comprises the following steps: performing catalytic cracking on heavy oil by a hydrothermal-resistant catalyst to obtain first-stage catalytic cracking products, wherein the first-stage catalytic cracking products are dry gas, liquefied gas, gasoline, diesel oil, wax oil and coke, and the hydrothermal-resistant catalyst is a solid alkali catalyst; and performing catalytic cracking on the first-stage wax oil by an acidic catalyst to obtain second-stage catalytic cracking products, wherein the second-stage catalytic cracking products are dry gas, liquefied gas, gasoline, diesel oil, oil slurry and coke. The method provided by the invention can be used for treating 100 percent residual oil or super-heavy oil raw materials, the liquid yield is high and the total carbon deposit amount of two-stage catalytic cracking is small; the hydrothermal-resistant alkaline catalyst of the first-stage catalytic cracking adopts a gasification regeneration technology, and synthetic gas with H / C ratio being about 1 is obtained; and the second-stage catalytic cracking takes the first-stage wax oil as the raw materials, the residual carbon content and the raw coke amount of the raw materials are low, so the treatment quantity of the second-stage catalytic cracking device is increased and the load of the regenerator is reduced.

Description

technical field [0001] The invention relates to a combined catalytic cracking method for treating residue oil or super heavy oil raw material, which belongs to the technical field of oil refining and chemical industry. Background technique [0002] With the depletion of light oil resources worldwide, the trend of heavy crude oil in the world has made refineries increasingly desire to convert heavy residue oil into light, high-priced products. The main processes for lightening heavy raw materials are hydrocracking, catalytic cracking and coking. Catalytic cracking is the most important petroleum secondary processing means, it can process vacuum gas oil and some vacuum residue, and the yield of light oil is high, but its feed is usually a mixture of vacuum gas oil and vacuum residue, Among them, the blending amount of vacuum residual oil is usually only 20-30%, and it is impossible to directly process pure residual oil feed or even inferior unconventional petroleum resources,...

Claims

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Application Information

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IPC IPC(8): C10G55/06
CPCC10G55/06C10G2300/70
Inventor 吴青
Owner CHINA NAT OFFSHORE OIL CORP
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