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Catalyst for selective hydrotreating of aromatic-rich heavy distillate oil, preparation method and application

A heavy distillate, hydrorefining technology, applied in the direction of catalyst activation/preparation, molecular sieve catalyst, chemical instruments and methods, etc., can solve the problems of high hydrogen consumption, waste of aromatic resources, poor hydrogenation selectivity, etc.

Active Publication Date: 2022-07-12
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The present invention aims at the poor hydrogenation selectivity of aromatic-rich heavy distillate oil in the prior art (a large number of naphthalene-based condensed-ring aromatics in the aromatic-rich oil are excessively hydrogenated into non-aromatics, wasting precious aromatics resources therein) , the problem of high hydrogen consumption, a new catalyst is provided, the catalyst has the ability to selectively hydrogenate and saturate fused-ring aromatics to form benzene series, increase the production of aromatics, and remove heterocyclic compounds such as sulfur and nitrogen in oil advantage

Method used

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  • Catalyst for selective hydrotreating of aromatic-rich heavy distillate oil, preparation method and application
  • Catalyst for selective hydrotreating of aromatic-rich heavy distillate oil, preparation method and application
  • Catalyst for selective hydrotreating of aromatic-rich heavy distillate oil, preparation method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0085] Preparation of composite carrier

[0086] 2000 grams of pseudo-boehmite powder with an average particle size of 10 nm was weighed and calcined at 850° C. for 8 hours to obtain powder A.

[0087] Weigh 500 grams of the above-mentioned powder A and 500 grams of pseudo-boehmite powder, add 15 grams of hydroxymethyl cellulose and 30 grams of Tianqing powder and mix uniformly to obtain powder B. Mix 800 grams of water, 20 grams of nitric acid, 10 grams of acetic acid, and 5 grams of calcium nitrate to form a transparent aqueous solution, knead with the above-mentioned powder B, and extrude it. Pore-distributed composite carrier. The pore size distribution, pore volume and specific surface area are shown in Table 1. figure 1 .

[0088] catalyst preparation

[0089] The active components are loaded by the equal volume impregnation method: 300 grams of water, 194.7 grams of nickel nitrate (50 grams of nickel oxide containing nickel), 98.2 grams of ammonium molybdate (80 gra...

Embodiment 2

[0096] Preparation of composite carrier

[0097] 2000 grams of pseudo-boehmite powder with an average particle size of 10 nm was weighed and calcined at 850° C. for 8 hours to obtain powder A.

[0098]Weigh 400 grams of the above powder A and 400 grams of pseudo-boehmite powder, 100 grams of hydrogen-type ultra-stable Y molecular sieve (H-Y molecular sieve), 100 grams of hydrogen-type β molecular sieve (H-β molecular sieve), and add hydroxymethyl cellulose. 15. Mix 30 grams of Tianqing powder evenly to obtain powder B. Mix 700 grams of water, 20 grams of nitric acid, 10 grams of acetic acid, and 5 grams of calcium nitrate to form a transparent aqueous solution, knead with the above-mentioned powder B, and extrude, then dry at 110 ° C for 6 hours, and bake at 600 ° C for 3 hours. Pore-distributed composite carrier. The pore size distribution, pore volume and specific surface area are shown in Table 1. Figure 4 .

[0099] catalyst preparation

[0100] The active components...

Embodiment 3

[0107] Preparation of composite carrier

[0108] 2000 grams of pseudo-boehmite powder with an average particle size of 10 nm was weighed and calcined at 850° C. for 8 hours to obtain powder A.

[0109] Weigh 400 grams of the above powder A, 400 grams of pseudo-boehmite powder, 200 grams of hydrogen-type ultra-stable Y molecular sieve (H-Y molecular sieve), add 15 grams of hydroxymethyl cellulose and 30 grams of Tianqing powder and mix evenly to obtain powder B . Mix 700 grams of water, 20 grams of nitric acid, 10 grams of acetic acid, and 5 grams of calcium nitrate to form a transparent aqueous solution, knead with the above-mentioned powder B, and extrude, then dry at 110 ° C for 6 hours, and bake at 600 ° C for 3 hours. Pore-distributed composite carrier. The pore size distribution, pore volume and specific surface area are shown in Table 1. Figure 7 .

[0110] catalyst preparation

[0111] The active components are loaded by the equal volume impregnation method: 300 g...

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Abstract

The present invention relates to a catalyst for selective hydrotreating of aromatic-rich heavy distillate oil and its preparation method and application. The catalyst, based on the total weight of the catalyst, includes the following components: a) 1-10% NiO; b) 3-15% MoO 3 ;c) 3~30%WO 3 d) 45-93% composite carrier; wherein, the composite carrier has a double-porous structure with pore diameters ranging from 8 to 10 nm and 12 to 15 nm. The catalyst of the invention can selectively hydrogenate aromatic-rich heavy distillate oil, selectively hydrogenate and saturate fused-ring aromatic hydrocarbons to generate cycloalkylbenzene series, the conversion rate is more than 95%, the selectivity is more than 92%, and the raw materials are retained. Aromatic hydrocarbons, the retention rate of aromatic hydrocarbons is greater than 92%, and the desulfurization and nitrogen rate of heterocyclic compounds such as sulfur and nitrogen in the raw materials are removed at the same time, and the nitrogen rate is greater than 98%, and good technical effects have been achieved.

Description

technical field [0001] The invention belongs to the field of aromatic-rich heavy distillate oil treatment, and particularly relates to a catalyst for selective hydrorefining of aromatic-rich heavy distillate oil, a preparation method and application thereof. Background technique [0002] Aromatic-rich heavy distillate oil, such as light cycle oil (LCO), has a relatively high proportion in my country's diesel pool, accounting for about 30%. It is the main secondary processed diesel component, and its total aromatic content is as high as 80%. Naphthalene series bicyclic Aromatic hydrocarbons account for about 70%, and monocyclic aromatic hydrocarbons and tricyclic aromatic hydrocarbons each account for about 15%. [0003] Ethylene tar is also a heavy distillate oil (>205°C) rich in aromatics (aromatics content greater than 90%). Polycyclic aromatic hydrocarbon compounds, short side chains, high carbon-hydrogen ratio, low heavy metal and ash content, and heterocyclic compoun...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/888B01J29/16B01J29/78B01J35/10B01J37/02B82Y30/00B82Y40/00C10G45/08C10G45/12
CPCB01J23/8885B01J29/166B01J29/7815B01J37/0201B82Y30/00B82Y40/00C10G45/08C10G45/12B01J35/393B01J35/23B01J35/69B01J35/635B01J35/647B01J35/615Y02P20/52
Inventor 钱斌刘仲能刘师前马宇春韩亚梅
Owner CHINA PETROLEUM & CHEM CORP