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Preparation method for hydrocracking catalyst

A hydrocracking and catalyst technology, which is applied in the field of hydrocracking, can solve the problems of poor catalyst activity, poor product properties, and accelerated catalysts, and achieve the effect of good activity and high nitrogen resistance

Active Publication Date: 2017-10-31
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this way, although the catalyst has strong nitrogen tolerance, the catalyst activity is poor, and the reaction temperature usually exceeds 400 ° C.
Due to the high reaction temperature, limited by the thermodynamic equilibrium of hydrogenation saturation of aromatic hydrocarbons, too high reaction temperature is unfavorable to the hydrogenation saturation reaction of aromatic hydrocarbons, and the product properties are poor
The higher reaction temperature also accelerates the carbon deposition and deactivation of the catalyst, which affects the operation cycle of the hydrocracking unit.
[0005] CN200710158784.0 discloses a hydrocracking catalyst containing Y molecular sieve and its preparation method. In this invention, Y-type molecular sieve is obtained after hydrothermal treatment with a mixed aqueous solution of aluminum salt and acid, and the obtained catalyst has high activity. But nitrogen tolerance is poor
[0006] CN98114489.6 discloses a nitrogen-resistant hydrocracking catalyst for high-yielding middle oil, which is used for one-stage serial hydrocracking of heavy distillate oil to produce a large amount of middle distillate oil. The nitrogen content of the feed in the cracking section can reach 100 μg / g, but the Catalyst activity is poor

Method used

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  • Preparation method for hydrocracking catalyst
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  • Preparation method for hydrocracking catalyst

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preparation example Construction

[0035] The preparation method of hydrocracking catalyst of the present invention specifically comprises the following contents:

[0036] (1) Mix the modified Y molecular sieve, amorphous silica-alumina and / or alumina uniformly according to a certain ratio, add dilute nitric acid to form a slurry, extrude, dry and roast to obtain a silica-alumina carrier containing modified Y molecular sieve; The concentration of the dilute nitric acid is 3wt%~30wt%; the drying condition is: drying at 80~120°C for 1~5 hours; the roasting condition is: roasting at 400~700°C for 1~5 hours;

[0037] (2) The carrier in step (1) is impregnated with an impregnation solution containing active metals, and the impregnated carrier is dried and roasted to obtain a hydrocracking catalyst; the impregnated liquid-solid mass ratio is 1.5:1~3:1 , carried out by means of saturated impregnation well known in the art, the content of VIB group metal compounds in the impregnation solution is 20~60g / 100ml according ...

Embodiment 1

[0041] Molecular sieve modification process:

[0042] (1) Take 200g of NaY molecular sieve raw powder prepared in the laboratory, mix it with ammonium nitrate with a concentration of 0.5mol / L according to the liquid-solid ratio of 3:1, exchange at 60°C for 2 hours, repeat this process twice, and the exchanged Y molecular sieve Na content in Na 2 O is calculated as 3.5%;

[0043] (2) The molecular sieve obtained in step (1) was mixed with distilled water according to the liquid-solid ratio of 5:1, then, 180ml of ammonium fluorosilicate solution with a concentration of 0.8mol / L was added, and treated at 60°C for 1.0 hour;

[0044] (3) Hydrothermally treat the Y molecular sieve obtained in step (2) at 560°C and 0.2MPa for 2 hours;

[0045] (4) The molecular sieve obtained in step (3) was stirred and mixed with distilled water according to the liquid-solid ratio of 5:1, and then the temperature was raised to 80°C. During the stirring process, 400ml of 0.6mol / L aluminum sulfate s...

Embodiment 2

[0057] Molecular sieve modification process:

[0058] (1) Take 200g of NaY molecular sieve raw powder prepared in the laboratory, mix it with ammonium nitrate with a concentration of 0.6mol / L according to the liquid-solid ratio of 3:1, exchange at 70°C for 3 hours, repeat this process twice, and the Y molecular sieve after exchange The Na content is 3.0% as Na2O.

[0059] (2) The molecular sieve obtained in step (1) was mixed with distilled water according to the liquid-solid ratio of 6:1, then, 150ml of ammonium fluorosilicate solution with a concentration of 0.6mol / L was added, and treated at 70°C for 1.0 hour;

[0060] (3) Hydrothermally treat the Y molecular sieve obtained in step (2) at 540°C and 0.15Mpa for 2 hours;

[0061] (4) The molecular sieve obtained in step (3) was stirred and mixed with distilled water according to the liquid-solid ratio of 6:1, and then the temperature was raised to 80°C. During the stirring process, 400ml of 0.8mol / L aluminum sulfate solution...

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Abstract

The invention discloses a preparation method for a hydrocracking catalyst. The method comprises the following steps: 1) uniformly mixing a modified Y molecular sieve, amorphous silicon aluminum and / or aluminum oxide, adding dilute nitric acid, pulping, extruding into a strip, drying and baking, thereby acquiring a silicon aluminum carrier containing the modified Y molecular sieve, wherein the mass percent of the modified Y molecular sieve in the silicon aluminum carrier is 1%-13%, preferably 2%-10% and the balance is amorphous silicon aluminum and / or aluminum oxide; 2) adopting a steeping liquor containing active metal for steeping the carrier in the step (1), drying and baking the steeped carrier, thereby acquiring the hydrocracking catalyst. The hydrocracking catalyst prepared according to the method disclosed by the invention has excellent reactivity and nitrogen resistance and is especially suitable for a single segment hydrocracking technology.

Description

technical field [0001] The invention belongs to the field of hydrocracking, and in particular relates to a preparation method of a hydrocracking catalyst. Background technique [0002] Hydrocracking technology has the characteristics of strong adaptability of raw materials, flexible product plan, high selectivity of target products, good product quality and high added value, and can directly produce a variety of high-quality petroleum products and chemical raw materials. Therefore, this technology has become the most suitable refining technology for rational utilization of limited crude oil resources, maximum production of clean petroleum products and high-quality chemical raw materials. Hydrocracking technology can be mainly divided into three types according to the processing flow: one-stage series hydrocracking process, single-stage hydrocracking process and two-stage hydrocracking process. One of the serial process flow sets up two reactors, refining and cracking. In th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/16C10G47/20
CPCC10G47/20B01J29/166B01J2229/16B01J2229/186C10G2300/70B01J35/617B01J35/633
Inventor 柳伟杜艳泽王凤来秦波高杭王阔董立廷贝耀明
Owner CHINA PETROLEUM & CHEM CORP
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