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Catalytic cracking method for treating residual oil and ultra-heavy oil raw material

A catalytic cracking and residual oil technology, which is applied in the treatment of hydrocarbon oil, hydrocarbon oil treatment products, refining and cracking process treatment only in multi-stage series, etc. The problems such as the increase in the amount of coke generated in the cracking unit, to achieve the effect of low residual carbon and sulfur and nitrogen content, maximized utilization, and high saturated hydrocarbon content

Inactive Publication Date: 2017-09-01
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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  • Catalytic cracking method for treating residual oil and ultra-heavy oil raw material
  • Catalytic cracking method for treating residual oil and ultra-heavy oil raw material
  • Catalytic cracking method for treating residual oil and ultra-heavy oil raw material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Example 1. Treatment of Daria vacuum residue with a hydrotalcite catalyst with a magnesium-aluminum ratio of 2.5

[0062] The basic properties of Daria vacuum residue are shown in Table 1.

[0063] Table 1 Daria Vacuum Residue

[0064]

[0065]

[0066] according to figure 1 The process shown is carried out, and the steps are as follows:

[0067] Use dry gas to lift the vacuum residue, and carry out catalytic cracking in the riser reactor, where the temperature is 525°C, the ratio of agent to oil is 5, and the pressure is 0.2Mpa. Then, the oil and gas in the spent catalyst are stripped through the stripping section, and the oil and gas are separated from the spent catalyst in a settler to obtain the spent catalyst and reaction oil and gas.

[0068] The catalyst to be regenerated enters the regenerator through the inclined pipe to be regenerated. The regeneration gas is a mixture of water vapor and air (the volume ratio of the two is 1:5.5), the temperature is 8...

Embodiment 2

[0079] From the data in Table 4, it can be seen that the residual carbon content in the wax oil is low, and it is a high-quality raw material for conventional catalytic cracking. Example 2, treating Penglai vacuum residue with a hydrotalcite catalyst with a magnesium-aluminum ratio of 3

[0080] The basic properties of Penglai vacuum residue are shown in Table 5.

[0081] Table 5 Penglai vacuum residue

[0082]

[0083]

[0084] according to figure 1 The process shown is carried out, and the steps are as follows:

[0085] Use dry gas to lift the vacuum residue, and carry out catalytic cracking in the riser reactor, where the temperature is 530°C, the ratio of catalyst to oil is 6, and the pressure is 0.2Mpa. Then, the oil and gas in the spent catalyst are stripped through the stripping section, and the oil and gas are separated from the spent catalyst in a settler to obtain the spent catalyst and reaction oil and gas.

[0086] The catalyst to be regenerated enters th...

Embodiment 3

[0099] Example 3: Continue conventional catalytic cracking with the wax oil obtained in Example 2, using HY molecular sieve catalyst, the reaction temperature is 515°C, the solvent-to-oil ratio is 6, and the pressure is 0.2Mpa.

[0100] The conditions for the regeneration of the catalyst to be regenerated are: air is used as the regeneration gas, the temperature is 580°C, the pressure is 0.3MPa, and the regeneration flue gas is discharged outside.

[0101] The distribution of products obtained by acid catalyst catalytic cracking is shown in Table 9.

[0102] Table 9 Distribution of products obtained by acid catalytic cracking

[0103] product Yield (wt%) dry gas, liquefied gas 19.1％ gasoline 43.9％ diesel fuel 28.7％ oil slurry 3.5％ coke 4.8％

[0104] As can be seen from the data in Table 9, the yield of gasoline and diesel reaches more than 72%.

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Abstract

The invention discloses a catalytic cracking method for treating residual oil and an ultra-heavy oil raw material. The catalytic cracking method comprises the following step: performing catalytic cracking on vacuum residuum, heavy oil and / or ultra-heavy oil by using a water-resistant thermal catalyst, so as to obtain a catalytic cracking product, wherein the catalytic cracking product is a dried gas, a liquidized gas, gasoline, diesel oil, wax oil or coke; the water-resistant thermal catalyst is a micro spherical solid alkali catalyst. The catalytic cracking method disclosed by the invention has the beneficial effects that raw materials such as 100% residual oil or ultra-heavy oil (such as oil sand bitumen) can be treated, the liquid yield is high, a wax oil component is high in saturated hydrocarbon content and low in residual carbon and sulfur nitrogen content, and can be directly applied to common catalytic cracking for producing high-quality gasoline and diesel oil; the water-resistant thermal catalyst adopts a gasification regeneration technique, a moisture and air mixture is adopted as a regeneration gas, a synthesis gas of which the H to C ratio is about 1 is generated, the synthesis gas can be further applied to a one-step method diesel oil production process or production of chemical products such as olefin and aromatic hydrocarbon, and maximum utilization of resource values is achieved.

Description

technical field [0001] The invention relates to a catalytic cracking method for treating residual oil and super heavy oil raw materials, belonging 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. [0003] In my country, catalytic cracking has become the most important petroleum secondary processing method due to its flexible operation, high light oil yield, and low investment and operating costs. It can process vacuum wax oil and part of vacuum residue. At present, acidic molecular sieve catalysts are mostly used in conventional catalytic cracking, and the feed is usually a mixture of vacuum gas oil and vacuum residue, of which the vacuum residue is only 20-30%, and it is impossible to directly process pure residue feed or even inferior v...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G55/06
CPCC10G55/06C10G2300/1077C10G2300/70C10G2400/02C10G2400/04
Inventor 吴青吴晶晶
Owner CHINA NAT OFFSHORE OIL CORP
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