A hydrocracking method for producing high-octane gasoline

A hydrocracking and hydrofining reaction technology, which is applied in the fields of hydrotreating process, hydrocarbon oil treatment, petroleum industry, etc., can solve the problems of not maximizing the utilization rate of aromatics and the loss of aromatics, and achieve less non-skeleton aluminum, high Effect of Octane Number, Excellent Selective Hydrogenation Activity and Selective Ring-Opening Cracking Performance

Active Publication Date: 2022-06-28
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a hydrocracking method for producing high-octane gasoline to solve the serious loss of aromatics in the process of processing inferior diesel raw materials to produce high-octane gasoline or small molecule aromatics , the problem that the utilization rate of aromatics is not maximized

Method used

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  • A hydrocracking method for producing high-octane gasoline
  • A hydrocracking method for producing high-octane gasoline
  • A hydrocracking method for producing high-octane gasoline

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preparation example Construction

[0048] The preparation process of the second hydrocracking catalyst C is as follows:

[0049] First, the Y molecular sieve in the second hydrocracking catalyst C is prepared by multiple dealumination and three water roasting:

[0050] (1) Using NaY zeolite as raw material to exchange with ammonium chloride solution, the processing conditions are: according to the ratio of NaY molecular sieve (dry basis): ammonium chloride: water = 1: 0.7: 10, exchange at 85 ° C for 1 hour, filter After washing with deionized water, it was dried at 120 °C for 4 h.

[0051] (2) The molecular sieve obtained in step (1) is subjected to the first hydrothermal calcination treatment, the calcination temperature is 600° C., and the calcination is carried out in a 100% water vapor atmosphere for 2 hours.

[0052] (3) The molecular sieve obtained in step (2) is in the ratio of molecular sieve (dry basis): citric acid: sulfuric acid: water = 1: 0.15: 0.05: 8, after first adding water to the molecular si...

Embodiment 1

[0072] The raw material oil E enters the hydrotreating reaction zone together with hydrogen, and contacts and reacts with the hydrotreating catalyst A. The reaction effluent of the hydrotreating reaction zone enters the hydrocracking reaction zone I together with the middle distillate, and reacts with the first hydrocracking catalyst. B contact reaction. The reaction effluent of hydrocracking reaction zone 1 enters into separation facilities such as high-pressure separator 1, low-pressure separator, and fractionation tower successively, and obtains dry gas, liquefied gas, gasoline fraction, middle distillate and tail after cooling, gas-liquid separation, and fractionation. The cut point for oil fractions, middle distillates and tails fractions is 280°C. In the middle distillate, the aromatic hydrocarbon content is 78% by weight, and the content of alkylbenzenes and tetrahydronaphthalene monocyclic aromatic hydrocarbons is 68% by weight; wherein all the middle distillate is cir...

Embodiment 2

[0075] The feed oil E enters the hydrotreating reaction zone together with hydrogen, contacts and reacts with the hydrotreating catalyst A, and the reaction effluent and the middle distillate in the hydrotreating reaction zone enter the hydrocracking reaction zone I, and react with the first hydrotreating catalyst A. B contact reaction. The reaction effluent of hydrocracking reaction zone 1 enters into separation facilities such as high-pressure separator 1, low-pressure separator, and fractionation tower successively, and obtains dry gas, liquefied gas, gasoline fraction, middle distillate and tail after cooling, gas-liquid separation, and fractionation. The cut point of the oil fraction, middle distillate and tail oil fraction is 290°C, the content of aromatic hydrocarbons in the middle distillate is 76% by weight, and the content of monocyclic aromatic hydrocarbons of alkylbenzenes and tetralin is 68% by weight. Wherein all the middle distillate is recycled to the hydrocrac...

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Abstract

The invention relates to a hydrocracking method for producing high-octane gasoline. The method comprises the steps of: reacting diesel raw materials in a hydrorefining reaction zone and a hydrocracking reaction zone I, and then separating and obtaining gasoline fractions, middle fractions and tail oil fractions . Among them, the middle distillate is returned to the hydrocracking reaction zone I for further conversion, and the tail oil fraction enters the hydrocracking reaction zone II for further conversion. The invention maximizes the conversion of polycyclic aromatic hydrocarbons in middle distillates and tail oil fractions, produces more high-octane gasoline fractions, the RON of the gasoline fractions can reach more than 93, and the loss of total aromatics is small.

Description

technical field [0001] The present invention relates to a hydrocracking method for producing high-octane gasoline. Background technique [0002] With the further upgrading of domestic diesel product quality and the continuous decline of diesel-gasoline ratio, inferior diesel has high content of impurities such as sulfur and nitrogen, high content of aromatics, and low cetane number, which is in sharp contradiction with the quality requirements of environmental protection regulations on diesel. It is no longer suitable as a clean diesel blending component; and refining and chemical enterprises generally have the problem of clean and efficient production to achieve product blending optimization and product value maximization, so the rational use of inferior diesel has become a matter of concern. [0003] However, catalytic cracked diesel is rich in aromatic hydrocarbons, and the content of aromatic hydrocarbons above bicyclic rings is even as high as 50%. This part of aromatic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G65/12
CPCC10G65/12C10G2400/02C10G2300/1037C10G2300/1055C10G2300/1059C10G2300/70
Inventor 任亮严张艳刘建伟胡志海张毓莹许双辰杨平
Owner CHINA PETROLEUM & CHEM CORP
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