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A catalytic conversion method for producing low-benzene and high-octane gasoline

A technology of high-octane gasoline and a catalytic conversion method is applied in the treatment of hydrocarbon oil, petroleum industry, hydrocarbon oil treatment products, etc. Content reduction, high octane number, effect of reducing benzene content

Active Publication Date: 2021-06-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this technology is mainly used to increase the production of low-carbon olefins, and does not involve the issue of reducing the benzene content in gasoline
[0006] In the existing refinery, in order to facilitate the conversion of diesel oil by using the existing catalytic cracking unit of the refinery, diesel oil is usually directly carried out in the catalytic cracking reactor (or called catalytic conversion reactor) for catalytic conversion reaction, but it will produce diesel secondary The benzene content of the gasoline produced by the reaction is high, and the benzene content in the gasoline must be further reduced through subsequent treatment, but it will further increase the dry gas and coke, and increase the gasoline loss.

Method used

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  • A catalytic conversion method for producing low-benzene and high-octane gasoline
  • A catalytic conversion method for producing low-benzene and high-octane gasoline
  • A catalytic conversion method for producing low-benzene and high-octane gasoline

Examples

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Effect test

Embodiment 1

[0053] Example 1 illustrates the effect of making diesel feedstock A and methanol carry out coupled reaction to produce low-benzene, high-octane gasoline through the method provided by the present invention. Diesel feedstock A is FCC diesel with a distillation range of 198-335°C. See Table 2 for specific properties.

[0054] In this example, a medium-sized device with two reactors for continuous reaction-regeneration operation is used for experiments, wherein the first catalytic conversion reactor is a riser with an inner diameter of 16 mm and a height of 3800 mm. The second catalytic conversion reactor is a fluidized bed, the inner diameter of the fluidized bed is 64 mm, and the height is 300 mm, and the outlet of the riser is connected to the bottom of the fluidized bed in fluid communication.

[0055] The regenerated catalyst with a temperature of about 660°C enters the bottom of the riser of the first catalytic conversion reactor through the inclined pipe of the regenerate...

Embodiment 2

[0077] Example 2 further illustrates the effect of making diesel feedstock B and methanol undergo coupling reaction to produce low-benzene and high-octane gasoline through the method provided by the present invention. Diesel feedstock B is light distillate diesel with a distillation range of 198-245°C. The properties of diesel feedstock B are shown in Table 2.

[0078] The reaction device that adopts is with embodiment 1, and raw material, main experiment procedure are with embodiment 1, and the weight ratio of methanol and diesel oil raw material is 5:95. The main operating conditions and results are listed in Table 4.

Embodiment 3

[0082] Example 3 further illustrates the effect of making diesel feedstock A and methanol undergo coupling reaction to produce low-benzene, high-octane gasoline through the method provided by the present invention. Diesel feedstock A is FCC diesel with a distillation range of 198-335°C. The properties of diesel feedstock A are shown in Table 2.

[0083] The reaction device adopted is the same as in Example 1, the raw materials and main experimental steps are the same as in Example 1, and the weight ratio of methanol and diesel oil raw materials is 50:50. The main operating conditions and results are listed in Table 5.

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Abstract

The invention relates to a catalytic conversion method for producing low-benzene and high-octane gasoline. The method comprises: injecting diesel raw material into a first catalytic conversion reactor to contact with a catalytic conversion catalyst and performing a first catalytic conversion reaction to obtain a first product and semi-spent raw catalyst; the first product and semi-spent raw catalyst are sent to the second catalytic conversion reactor to contact with methanol and carry out the second catalytic conversion reaction to obtain the second product and the spent raw catalyst; the second product is carried out Separation to obtain at least dry gas products, liquefied gas products, gasoline products and diesel products; regenerate the raw catalyst as the catalytic conversion catalyst and send it to the first catalytic conversion reactor. The method provided by the invention can produce gasoline products with low benzene and high octane number by strengthening the coupling reaction between methanol and diesel raw materials.

Description

technical field [0001] The invention relates to a catalytic conversion method for producing gasoline with low benzene and high octane number. Background technique [0002] In the standard GB17930-2013 of the People's Republic of China for motor gasoline, the technical requirements for motor gasoline are that the content of olefins is not more than 24% (volume fraction), the content of aromatics is not more than 40% (volume fraction), and the content of benzene is not more than 1.0% (volume fraction ). China's new gasoline standards in the future may also refer to the requirements of the US Federal Gasoline Standards, requiring that the content of olefins is not more than 15% (volume fraction), the content of aromatics is not more than 35% (volume fraction), and the content of benzene is not more than 0.8% (volume fraction) , the requirements are more stringent. In order to increase the production of high-quality gasoline products, the current conventional method is to incr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G53/02C10G29/06
CPCC10G29/06C10G53/02C10G2300/1037C10G2300/305C10G2300/70C10G2400/02C10G2400/04
Inventor 朱金泉高永灿崔琰杨轶男
Owner CHINA PETROLEUM & CHEM CORP