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A kind of hydrogenation method of catalytic cracking diesel oil production BTX fraction

A technology for catalytic cracking of diesel oil and fractions, which is applied in the fields of hydrocarbon oil treatment products, hydrotreating process, hydrocarbon oil treatment, etc. It can solve the problems of poor selectivity of BTX and achieve the effect of improving yield

Active Publication Date: 2021-10-08
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 in the prior art, provide a kind of method that catalytic cracking diesel oil produces BTX cut, to solve the technical problem of poor selectivity of BTX in the process of processing LCO to produce BTX

Method used

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  • A kind of hydrogenation method of catalytic cracking diesel oil production BTX fraction
  • A kind of hydrogenation method of catalytic cracking diesel oil production BTX fraction
  • A kind of hydrogenation method of catalytic cracking diesel oil production BTX fraction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] The raw material oil C was cut into a cleavage of 324 ° C to a light catalytic cracking diesel fraction Ca ( 324 ° C). The CA enters the low pressure hydrocracking unit, sequentially contacts the hydrothermal catalyst A and the hydrocracking catalyst B. In the low pressure hydrocracking unit, the nitrogen-free reaction zone I of hydrotreating reaction zone I is controlled to reduce the nitrogen content of the hydrothermal reaction zone I liquid phase reaction effluent to 20 μg / g below. The Cb enters the medium pressure hydrocracking unit, sequentially contacts the hydrocarbon catalyst A and the hydrocracking catalyst B. The reaction product of the low-pressure hydrocracking unit is distilled with the reaction product of the medium pressure hydrocracking unit to obtain a gas, rich in BTX fraction and diesel fractions. The reaction conditions are shown in Table 3, and the properties of the product are shown in Table 4.

[0054] As can be seen from Table 1, after the catalyt...

Embodiment 2

[0057] The raw oil C was cut into a cleavage of 300 ° C to a light catalytic cracking diesel fraction Ca ( 300 ° C). The CA enters the low pressure hydrocracking unit, sequentially contacts the hydrothermal catalyst A and the hydrocracking catalyst B, and controls the hydrotreating reaction zone I of the hydrotreating reaction zone I and the aramid hydrocarbon saturated depth of hydrocrystallization and the hydrogenation. The nitrogen content decreases to 20 μg / g in the reaction zone I liquid phase reaction effluent. The Cb enters the medium pressure hydrocracking unit, sequentially contacts the hydrocarbon catalyst A and the hydrocracking catalyst B. The reaction product of the low-pressure hydrocracking unit is distilled with the reaction product of the medium pressure hydrocracking unit to obtain a gas, rich in BTX fraction and diesel fractions. The reaction conditions are shown in Table 3, and the properties of the product are shown in Table 4.

[0058] As can be seen from T...

Embodiment 3

[0063] The raw material oil C was cut into a cleavage of 324 ° C to a light catalytic cracking diesel fraction Ca ( 324 ° C). The CA enters the low pressure hydrocracking unit, sequentially contacts the hydrothermal catalyst A and the hydrocracking catalyst B. In the low pressure hydrocracking unit, the nitrogen-free reaction zone I of hydrotreating reaction zone I is controlled to reduce the nitrogen content of the hydrothermal reaction zone I liquid phase reaction effluent to 20 μg / g below. The Cb enters the medium pressure hydrocracking unit, sequentially contacts the hydrocarbon catalyst A and the hydrocracking catalyst B. The reaction product of the low-pressure hydrocracking unit is distilled with the reaction product of the medium pressure hydrocracking unit to obtain a gas, rich in BTX fraction and diesel fractions. The partial diesel fractions are all circulated to the raw material system. The reaction conditions are shown in Table 5, and the properties of the product a...

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Abstract

A hydrogenation method for producing BTX fractions from catalytic cracking diesel oil. The catalytic cracking diesel oil is cut into a light catalytic cracking diesel fraction and a heavy catalytic cracking diesel fraction. The light catalytic cracking diesel fraction enters a low-pressure hydrocracking unit for reaction, and the heavy catalytic cracking diesel fraction Enter the medium-pressure hydrocracking unit for reaction, and the reaction product enters the fractionation system to obtain gas, BTX-rich fraction, and diesel fraction after fractionation. According to the characteristics of catalytic cracking diesel raw materials with many sulfur and nitrogen impurities and high content of aromatics, the present invention adopts the technical scheme of combined hydrogenation to produce fractions rich in BTX, thereby reducing the ratio of diesel to gasoline, and uses BTX fractions to fill the market of light aromatics in my country gap.

Description

Technical field [0001] The present invention relates to a hydrogenation process for catalytic cracking diesel production of BTX fractions. Background technique [0002] As crude oil is increatancy, more and more reduced gastroa recombination and even residue become the raw material of fluidized catalytic cracking (FCC) devices, resulting in the degree of conversion of the raw material to be growing. The catalytic cracking diesel (LCO) fractionated from FCC unit has a high source of sulfur, and the amount of nitrogen impurity content is high. It has been difficult to achieve clean fuel by conventional hydrotreating and hydrogenation and hydrotreating process. An aromatic hydrocarbon component cannot be effectively utilized, and finding new path processing LCO becomes more and more important. [0003] On the other hand, the production of BTX (benzene, toluene, and xylene) at home and abroad is mainly based on catalytic reforming process and vapor cracking of naphtha for raw materia...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G65/12
CPCC10G65/12C10G2300/1037C10G2300/4006C10G2300/4012C10G2300/4018C10G2400/30
Inventor 胡志海严张艳任亮吴昊张毓莹梁家林许双辰
Owner CHINA PETROLEUM & CHEM CORP
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