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Combined technological method for maximum production of light aromatic hydrocarbon from hydrogenated diesel oil

A technology of light aromatics and hydrogen diesel, which is applied in the field of hydrogenation diesel to prepare light aromatics, can solve the problems of poor adaptability of raw materials, high yield of gasoline and diesel, low yield of aromatics, etc., and achieve strong adaptability of raw materials and high purity of products , the effect of high purity

Active Publication Date: 2017-09-22
CNOOC TIANJIN CHEM RES & DESIGN INST +1
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AI Technical Summary

Problems solved by technology

[0009] The present invention mainly solves the problems of poor raw material adaptability, high yield of gasoline and diesel, low yield of aromatics, high hydrogen consumption and extraction of aromatics for aromatics products in the prior art of producing aromatics from diesel oil. Combination of aromatics synthesis light aromatics technologies to maximize the conversion of aromatics and naphthenes in diesel into high value-added light aromatics

Method used

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  • Combined technological method for maximum production of light aromatic hydrocarbon from hydrogenated diesel oil
  • Combined technological method for maximum production of light aromatic hydrocarbon from hydrogenated diesel oil
  • Combined technological method for maximum production of light aromatic hydrocarbon from hydrogenated diesel oil

Examples

Experimental program
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Effect test

Embodiment 1

[0035] The hydrogenated straight-run diesel oil from a refinery was used as the raw material, and the composition of the raw material is shown in Table 1.

[0036] Both the first-stage adsorption and separation device and the second-stage adsorption and separation device are filled with Cu / 13X molecular sieve catalyst (Cu loading is 4wt%). The reaction conditions of the two adsorption and separation devices are: temperature 120 ° C, pressure 2.0 MPa, mass space velocity 1.5 h -1 .

[0037] The cycloalkane dehydrogenation catalyst adopts Pt / SiO 2 Catalyst (Pt loading is 0.3wt%), reaction conditions: reaction temperature 420°C, pressure 2.0MPa, mass space velocity 1.5h -1 Under the condition of , the cycloalkane dehydrogenation reaction occurs, and the cycloalkane dehydrogenation product rich in aromatics is obtained.

[0038] Heavy aromatics lightening catalysts are Pt-Ni / β (Pt loading is 0.3wt%, Ni loading is 5wt%), non-aromatic cracking catalyst Ni-Mg / ZSM-5 (Ni loading is 4...

Embodiment 2

[0041] The hydrogenated catalytic diesel from a refinery was used as the raw material, and the composition of the raw material is shown in Table 1. All other conditions are the same as in Example 1, the yields of each product are shown in Table 2, and the composition of the diesel product obtained is shown in Table 3.

Embodiment 3

[0043] Hydrogenated straight-run diesel, hydrogenated catalytic diesel, hydrogenated DCC diesel, and hydrocoked diesel blended diesel from a refinery were used as raw materials. The composition of the raw materials is shown in Table 1. All other conditions are the same as in Example 1, the yields of each product are shown in Table 2, and the composition of the diesel product obtained is shown in Table 3.

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Abstract

The invention relates to a combined technological method for maximum production of light aromatic hydrocarbon from hydrogenated diesel oil. The method includes: firstly letting hydrogenated diesel oil enter an I section adsorption separation device to obtain an I section alkane component rich in cycloalkane and alkane and an I section heavy aromatic hydrocarbon component rich in aromatic hydrocarbon; sending the I section alkane component into a cycloalkane dehydrogenation reactor to obtain a cycloalkane dehydrogenation product rich in aromatic hydrocarbon, conducting gas-liquid separation, and letting the liquid phase enter an II section adsorption separation device so as to obtain an alkane component rich in alkane and an II section heavy aromatic hydrocarbon component rich in aromatic hydrocarbon; letting the I section heavy aromatic hydrocarbon component, the II section heavy aromatic hydrocarbon component and hydrogen enter a heavy aromatic hydrocarbon conversion reactor to obtain a light aromatic hydrocarbon product rich in BTX, and performing separation to obtain hydrogen, returning the hydrogen and part of C9<+> heavy aromatic hydrocarbon together to the heavy aromatic hydrocarbon conversion reactor for further reaction, and taking the rest C9<+> heavy aromatic hydrocarbon, dry gas, liquefied gas, C5-C6 non-aromatics and BTX product as the products. The method realizes maximum production of light aromatic hydrocarbon, and has the advantages of strong raw material adaptability, high yield of light aromatic hydrocarbon, low hydrogen consumption and no need for aromatic hydrocarbon extraction.

Description

technical field [0001] The invention relates to the technical field of preparing light aromatics from hydrogenated diesel oil, in particular to a combined process method for maximizing the production of light aromatics from hydrogenated diesel oil. Background technique [0002] As economic development enters a new normal, my country’s refined oil consumption structure has undergone significant changes, and the consumption of diesel-gasoline ratio has continued to decline. It is estimated that by 2020, the diesel-gasoline ratio will drop from the current 1.5:1 to 1:1, and there will be a surplus of 50 million tons of diesel oil by then. / year. In addition, environmental protection regulations are becoming increasingly stringent, and the National VI diesel standard will further reduce the content of polycyclic aromatic hydrocarbons, and oil refining companies are facing more severe forms of upgrading oil quality. How to reduce the ratio of diesel to gasoline and realize the hi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/14
CPCC10G67/14C10G2300/1037C10G2400/30
Inventor 于海斌臧甲忠郭春垒范景新王银斌李滨刘航汲银平宫毓鹏靳凤英
Owner CNOOC TIANJIN CHEM RES & DESIGN INST
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