Combined processing method of petroleum hydrocarbon and polycyclic aromatic hydrocarbon-rich material

A technology for combined processing of polycyclic aromatic hydrocarbons, which is applied in the field of combined processing of petroleum hydrocarbons and materials rich in polycyclic aromatic hydrocarbons, and can solve the problems of increased dry gas and coke yields in catalytic cracking units

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

However, this method does not give the specific composition of aromatic components. It is difficult for bicyclic aromatic hydrocarbons and polycyclic aromatic hydrocarbons to enter the catalytic cracking unit to undergo ring-opening cracking reactions to form ideal products, which will easily lead to a sharp increase in the yield of dry gas and coke in the catalytic cracking unit.

Method used

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  • Combined processing method of petroleum hydrocarbon and polycyclic aromatic hydrocarbon-rich material
  • Combined processing method of petroleum hydrocarbon and polycyclic aromatic hydrocarbon-rich material

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Experimental program
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Embodiment

[0056] Reagents, Instruments and Tests

[0057] Unless otherwise specified, the reagents used in the present invention are all analytically pure, and all reagents used are commercially available, for example, purchased from Bailingwei and Sinopharm Group.

[0058] In the following examples, preparation examples and comparative examples, the assay method of B acid acidity is as follows:

[0059] The FTS3000 Fourier transform infrared spectrometer produced by the American BIO-RAD company was used.

[0060] Test conditions: After the sample is pressed into a tablet, it is placed in the in-situ cell of the infrared spectrometer and sealed, and it is vacuumed at 350 ° C to 10 -3 Pa, keep it for 1h to desorb the gas molecules on the surface of the sample, and cool to room temperature. Introduce pyridine vapor with a pressure of 2.67Pa into the in-situ cell, and after equilibrating for 30 minutes, raise the temperature to 200°C, and then evacuate to 10°C again. -3 Pa, keep for 30m...

preparation example 1

[0062] Preparation Example 1 Preparation of Modified Aluminum Oxide

[0063] Take 100.0 grams of pseudo-boehmite (Changling Catalyst Branch), impregnate with an aqueous solution containing 5.5 g of ammonium fluoride for 3 hours, dry at 150°C for 3 hours, and roast at 550°C for 3 hours in an air atmosphere to obtain a modified compound containing F. alumina.

preparation example 2

[0064] The preparation of preparation example 2 catalyst CAT1

[0065] Get 50.0 grams of pseudo-boehmite (Changling Catalyst Branch Company, dry base 0.71) and mix with 191.9 grams of modified alumina (preparation example 1), and extrude into a clover-shaped strip whose circumscribed circle diameter is 1.6 mm, wet The strips were dried at 150°C for 3 hours and calcined at 550°C for 3 hours to obtain carrier Z1. The B acid content of carrier Z1 is shown in Table 1.

[0066] Take 100.0 g of carrier Z1 and use 95 ml of MoO 3 280.7 g / L, NiO 42.1 g / L, P 2 o 5 28.1 g / L, citric acid 45.5 g / L nickel, molybdenum complex solution impregnated for 4 hours, dried at 150 ° C for 3 hours to obtain the catalyst CAT1. The content of metal oxides on the catalyst CAT1 is shown in Table 1.

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Abstract

The invention provides a combined processing method of petroleum hydrocarbon and a polycyclic aromatic hydrocarbon-rich material, which comprises the following steps: mixing petroleum hydrocarbon and hydrogen, and introducing the mixture into a hydrofining reaction zone to obtain a hydrofining effluent; mixing the hydrofining effluent with a material rich in polycyclic aromatic hydrocarbons, and introducing the mixture into a hydrocracking reaction zone to obtain a hydrocracking effluent; and separating and fractionating the hydrocracking effluent, wherein the hydrocracking reaction zone comprises an upstream zone and a downstream zone along the material flowing direction, the upstream zone is filled with a catalyst I, the downstream zone is filled with a catalyst II, and the B acid amount of the catalyst I is lower than that of the catalyst II. According to the combined processing method, the characteristic that polycyclic aromatic hydrocarbon is high in adsorption performance on the catalyst is utilized, excessive cracking of long side chains of alkane and alkyl cyclic hydrocarbon in petroleum hydrocarbon is inhibited, the structure of hydrocarbon molecules is kept to the maximum extent, product distribution is optimized, product quality is improved, meanwhile, hydrogen consumption is reduced, and process economy is improved.

Description

technical field [0001] The invention relates to the field of hydrocracking, in particular to a method for combined processing of petroleum hydrocarbons with high paraffin content and materials rich in polycyclic aromatic hydrocarbons. Background technique [0002] The market demands more light, high-quality and clean petroleum products, and the contradiction between supply and demand in the petroleum and petrochemical market is increasing day by day; while crude oil is becoming increasingly heavy and inferior, heavy oil contains a large amount of condensed ring aromatics, these condensed ring aromatics They are coking precursors. The increase of their content not only increases the difficulty of processing, but also causes the imbalance of hydrogen distribution in raw materials and unreasonable product structure. On the other hand, my country’s oil quality upgrades are accelerating. National VI diesel requires that the content of polycyclic aromatic hydrocarbons not exceed 7...

Claims

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Application Information

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IPC IPC(8): C10G67/02
CPCC10G67/02C10G2300/70Y02P20/52
Inventor 杨平秦康董松涛胡志海任亮
Owner CHINA PETROLEUM & CHEM CORP
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