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A method of catalytic cracking

A catalytic cracking and catalyst technology, which is applied in the treatment of hydrocarbon oil, petroleum industry, hydrotreating process, etc., can solve the problems of increased coke yield, achieve reduced coke yield, increase gasoline yield, and better product selectivity Effect

Active Publication Date: 2020-11-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The light fraction of light cycle oil contains olefin components. When it is directly mixed with raw materials, the coke yield will increase due to the mixing of olefins in the light fraction of light cycle oil.

Method used

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  • A method of catalytic cracking
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Examples

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Embodiment 1

[0071] This embodiment illustrates adopting the method provided by the present invention, carried out in a medium-sized catalytic cracking unit and a medium-sized hydrogenation unit, and the specific process refers to figure 1 .

[0072] First, the light cycle oil E is sent to the medium-sized hydrogenation unit 10 to contact with the hydrotreating catalyst to carry out the hydrogenation treatment of the hydrogenation saturation of aromatic hydrocarbons to obtain the hydrogenated light cycle oil F, and the hydrogenated light cycle oil F is sent to the raw material tank (height 60 centimeters, volume 75 liters) 16, mixed with feedstock A as catalytic cracking feedstock oil, feedstock A and hydrogenated light cycle oil F are mixed according to the weight ratio of 3.84:1, mixing conditions are: stirring speed is 60 rpm / min, with continuous stirring. The mixed raw oil C is sent to a medium-sized catalytic cracking unit for reaction, and the catalyst used is CGP-1. The specific o...

Embodiment 2

[0074] This example illustrates the use of the method provided by the invention for catalytic cracking, which is carried out in a medium-sized catalytic cracking unit and a medium-sized hydrogenation unit, and the specific process refers to figure 1 .

[0075] The specific operation method is basically the same as that of Example 1, except that the raw material oil B is used as the catalytic cracking raw material oil, and the self-produced light cycle oil J is used for hydrogenation treatment to obtain hydrogenated light cycle oil L as light oil, and the obtained mixed The raw material oil D1 was sent to a medium-sized catalytic cracking unit for reaction, and the catalyst was ASC-4. See Table 5 for specific operating conditions and product distribution.

Embodiment 3

[0077] This example illustrates that catalytic cracking is carried out using the method provided by the present invention, which is carried out in a medium-sized catalytic cracking unit and a medium-sized hydrogenation unit, and the specific process refers to figure 1 .

[0078] First, the light cycle oil J and the oil slurry K are mixed according to the weight ratio of 1:1.29, and sent to the filter device to filter to obtain the separated fraction oil M, and the separated fraction oil M is sent to the medium-sized hydrogenation unit 10 to contact with the hydrotreating catalyst. Aromatic hydrogenation and saturation hydrogenation treatment to obtain hydrogenated and separated distillate N, which is sent to the raw material tank 16 as light oil and mixed with fresh raw material B as catalytic cracking raw material oil. The fresh raw material The mixing weight ratio of B and hydrogenated distillate oil N is 2.28:1, and the mixing conditions are: the stirring speed is 60 rpm, a...

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Abstract

The present invention relates to a catalytic cracking method, which includes the steps: a. mixing catalytic cracking feedstock oil with light oil in a feedstock tank to obtain mixed feedstock oil, wherein the viscosity of the mixed feedstock oil at 80 DEG C is not higher than 92% of that of the catalytic cracking feedstock oil at 80 DEG C; and the viscosity of the catalytic cracking feedstock oilat 80 DEG C is not lower than 50 mm<2> / s, and the viscosity of the light oil at 80 DEG C is 0.5-40 mm<2> / s; and b. feeding the mixed feedstock oil into a catalytic cracking reactor to contact a catalytic cracking catalyst to be subjected to a catalytic cracking reaction to obtain dry gas, liquefied gas, gasoline, light circulating oil and oil slurry. The catalytic cracking method provided by the invention can reduce the yield of coke and the dry gas and improve the utilization rate of hydrogen element.

Description

technical field [0001] The present invention relates to a method for catalytic cracking. Background technique [0002] With the development of society, it has become an important indicator to improve the environmental quality to improve the cetane number of diesel and reduce the content of aromatics and sulfur in vehicle diesel. Euro VI automotive diesel standards require that the sulfur content is not higher than 50 μg / g, the volume fraction of polycyclic aromatic hydrocarbons is not higher than 6%, and the cetane number is required to reach 58. However, the diesel produced by catalytic cracking, especially the diesel produced by inferior raw materials, is rich in aromatics, which can be as high as 50% to 75%. The content of single-ring aromatics is 19-25%. The cetane number of aromatics is very low, and the more aromatic rings The lower the cetane number. Therefore, catalyzed diesel often requires deep hydrotreating and upgrading before it can be shipped as a blending co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/00
CPCC10G67/00C10G2300/302
Inventor 崔守业白旭辉王新程从礼
Owner CHINA PETROLEUM & CHEM CORP
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