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Hydrocracking method for producing high-octane gasoline

A technology of hydrocracking and hydrofining reaction, which is applied in hydroprocessing process, petroleum industry, and hydrocarbon oil treatment, and can solve the problems of loss of aromatics and unmaximized utilization of aromatics

Active Publication Date: 2021-05-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • 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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  • Hydrocracking method for producing high-octane gasoline
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  • Hydrocracking method for producing high-octane gasoline

Examples

Experimental program
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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 times of water roasting:

[0050] (1) Use NaY zeolite as raw material to exchange with ammonium chloride solution. The treatment conditions are: according to the ratio of NaY molecular sieve (dry basis): ammonium chloride: water = 1:0.7:10, exchange at 85°C for 1h, filter Afterwards, it was washed with deionized water and dried at 120°C for 4 hours.

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

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

Embodiment 1

[0072] The raw material oil E enters the hydrotreating reaction zone together with hydrogen, and reacts with the hydrofinishing catalyst A, and the reaction effluent from the hydrofining 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 from hydrocracking reaction zone I enters separation facilities such as high-pressure separator I, low-pressure separator, and fractionation tower in turn, and obtains dry gas, liquefied gas, gasoline fraction, middle distillate and tailings after cooling, gas-liquid separation, and fractionation. The cut point for oil fraction, middle distillate and tail oil fraction is 280°C. The content of aromatics in the middle distillate is 78% by weight, and the content of single-ring aromatics in alkylbenzenes and tetrahydronaphthalenes is 68% by weight; wherein the middle distillate is all recycled to the hydrocracking re...

Embodiment 2

[0075] The raw material oil E enters the hydrotreating reaction zone together with hydrogen, contacts and reacts with the hydrofinishing catalyst A, and the reaction effluent and the middle distillate from the hydrofining reaction zone enter the hydrocracking reaction zone I, and react with the first hydrocracking catalyst B contact reaction. The reaction effluent from hydrocracking reaction zone I enters separation facilities such as high-pressure separator I, low-pressure separator, and fractionation tower in turn, and obtains dry gas, liquefied gas, gasoline fraction, middle distillate and tailings after cooling, gas-liquid separation, and fractionation. The cut point of the oil fraction, the middle distillate and the tail oil fraction is 290° C., the content of aromatics in the middle distillate is 76% by weight, and the content of single-ring aromatics of alkylbenzenes and tetralins is 68% by weight. The middle distillates are all recycled to the hydrocracking reaction zo...

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Abstract

The invention relates to a hydrocracking method for producing high-octane gasoline, which comprises the following steps: reacting a diesel oil raw material in a hydrofining reaction zone and a hydrocracking reaction zone I, and separating to obtain a gasoline fraction, a middle fraction and a tail oil fraction. Wherein the middle fraction returns to the hydrocracking reaction zone I for further conversion, and the tail oil fraction enters the hydrocracking reaction zone II for further conversion. According to the method, polycyclic aromatic hydrocarbons in the middle fraction and the tail oil fraction are converted to the maximum extent, high-octane gasoline fractions are produced, the RON of the gasoline fractions can reach 93 or above, and the loss of total aromatic hydrocarbons is small.

Description

technical field [0001] The invention relates to a hydrocracking method for producing high-octane gasoline. Background technique [0002] As the quality of domestic diesel products is further upgraded and the ratio of diesel to gasoline continues to decline, low-quality diesel has high 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 optimize product blending and maximize product value, so the rational use of low-quality diesel has become a concern. [0003] FCC diesel is rich in aromatics, and the content of aromatics with double rings or above is even as high as 50%. This part of aromatics is complex and difficult to separate. It is a high-quality resource for ...

Claims

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Application Information

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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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