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A kind of preparation method of single stage hydrocracking catalyst

A hydrocracking and catalyst technology, applied in physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc., can solve problems such as poor product properties, poor catalyst activity, and poor nitrogen resistance, and achieve high nitrogen resistance. , good active effect

Active Publication Date: 2019-10-15
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • A kind of preparation method of single stage hydrocracking catalyst
  • A kind of preparation method of single stage hydrocracking catalyst
  • A kind of preparation method of single stage hydrocracking catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Molecular sieve modification process:

[0040] (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 70°C for 3 hours, repeat this process 3 times, and the exchanged Y molecular sieve Na content in Na 2 O is calculated as 2.5%;

[0041] (2) Hydrothermally treat the Y molecular sieve obtained in step (1) at 570°C and 0.2MPa for 2 hours;

[0042] (3) The molecular sieve obtained in step (2) was stirred and mixed with distilled water according to the liquid-solid ratio of 5:1, and then the temperature was raised to 90°C. During the stirring process, 400ml of 1.2mol / L aluminum sulfate solution was added, and the reaction was carried out at constant temperature for 3 hours.

[0043] (4) The molecular sieve obtained in step (3) was dried at 150°C for 8 hours;

[0044] (5) Take the molecular sieve obtained in step (4) and place it in a ...

Embodiment 2

[0054] Molecular sieve modification process:

[0055] (1) Take the NaY molecular sieve raw powder prepared in the laboratory, mix it with ammonium nitrate with a concentration of 0.8mol / L according to the liquid-solid ratio of 3:1, exchange at 70°C for 3 hours, repeat this process 3 times, and the Y molecular sieve after exchange Na content in Na 2 O is calculated as 2.0%.

[0056] (2) Hydrothermally treat the Y molecular sieve obtained in step (1) at 570°C and 0.1MPa for 1 hour;

[0057] (3) The molecular sieve obtained in step (2) was stirred and mixed with distilled water according to the liquid-solid ratio of 6:1, and then the temperature was raised to 90°C. During the stirring process, 600ml of 1.5mol / L aluminum sulfate solution was added, and the reaction was carried out at constant temperature for 2 hours.

[0058] (4) The molecular sieve obtained in step (3) was dried at 200°C for 4 hours;

[0059] (5) soak the molecular sieve obtained in step (4) in heptene for 2 h...

Embodiment 3

[0069] Molecular sieve modification process:

[0070] (1) Take the NaY molecular sieve raw powder prepared in the laboratory, mix it with ammonium nitrate with a concentration of 0.8mol / L according to the liquid-solid ratio of 3:1, exchange at 70°C for 3 hours, repeat this process 3 times, and the Y molecular sieve after exchange Na content in Na 2 O is calculated as 2.0%.

[0071] (2) Hydrothermally treat the Y molecular sieve obtained in step (1) at 550°C and 0.15MPa for 2 hours;

[0072] (3) The molecular sieve obtained in step (2) was stirred and mixed with distilled water according to the liquid-solid ratio of 6:1, and then the temperature was raised to 90°C. During the stirring process, 600ml of 1.0mol / L aluminum sulfate solution was added, and the reaction was carried out at constant temperature for 2 hours.

[0073] (4) The molecular sieve obtained in step (3) was dried at 250°C for 2 hours;

[0074] (5) soak the molecular sieve obtained in step (4) in heptene for 4...

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Abstract

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

Description

technical field [0001] The invention relates to a preparation method of a single-stage 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 the refining reactor, a hydrotreating catalyst...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/16C10G47/20
Inventor 柳伟杜艳泽秦波高杭阮彩安董立廷贝耀明
Owner CHINA PETROLEUM & CHEM CORP
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