Hydrocracking method

A hydrocracking and hydrotreating technology, applied in hydrotreating process, petroleum industry, treating hydrocarbon oil, etc., can solve problems such as difficult to effectively treat, not economical, large hydrogen consumption, etc. The effect of excessive reduction of unit cell constant, increase of latent aromatics content, and increase of yield

Active Publication Date: 2007-05-02
CHINA PETROLEUM & CHEM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is difficult to effectively treat this kind of inferior catalytic cracked diesel oil by the above-mentioned hydrog

Method used

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  • Hydrocracking method

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Effect test

Embodiment 1

[0048] Weigh the raw material NH 4 NaY molecular sieve (80% ammonium exchange degree, 27.1% weight loss on ignition, SiO 2 / Al 2 O 3 The molar ratio is 5.3, the sodium oxide content is 4.0wt%) 2057.6 g, 9 liters of distilled water is added to make a slurry, and the slurry is heated to 95°C under stirring; 495.0 grams of ammonium hexafluorosilicate is added dropwise to the above slurry The solution prepared with 3500 ml of distilled water was dripped in 2 hours, and then continued stirring at 95°C for 2 hours. After stopping the stirring and letting it stand for about 10 minutes, the settled fluorine (silicon) ammonium sodium aluminate crystals were separated by decantation. After washing with water and drying, a Y-type molecular sieve precursor A1 is obtained.

[0049] Weigh the raw material NH 4 NaY molecular sieve (75% ammonium exchange degree, 26% weight loss on ignition, SiO 2 / Al 2 O 3 Molar ratio is 4.5, sodium oxide content is 4.0wt%) 270g, add 1.2 liters of distilled water...

Embodiment 2

[0051] In this embodiment, the hydrocracking catalyst C1 is prepared, and the specific steps are as follows:

[0052] (1) The Y-type molecular sieve precursor A1 is subjected to hydrothermal treatment, wherein the hydrothermal treatment conditions are as follows: the temperature is 600° C., the water pressure is 0.1 MPa, and the treatment time is 1 hour to obtain the Y-type molecular sieve Y1.

[0053] (2) Take 153.5 grams of the Y-type molecular sieve Y1 obtained in step (1), made of 120 grams of small-pore alumina (pore volume 0.47ml / g, specific surface area of ​​280m 2 / g), 0.2N dilute nitric acid solution, 440ml of the adhesive prepared by peptizing, after extruding and forming, then drying at 110°C for 5 hours and calcining at 600°C for 6 hours to obtain the catalyst carrier.

[0054] (3) Impregnating the catalyst support obtained in step (2) with an aqueous solution containing molybdenum and nickel, drying at 110°C for 5 hours, and calcining at 500°C for 5 hours to prepare t...

Embodiment 3

[0056] In this embodiment, the hydrocracking catalyst C2 is prepared, and the specific steps are as follows:

[0057] (1) Mix, extrude and shape 170g of Y-type molecular sieve precursor A1 and a binder prepared by peptizing 80g of small-pore alumina and dilute nitric acid solution (same as in implementation 2),

[0058] (2) Treat the molded product obtained in step (1) with ammonia gas-steam at high temperature. The treatment conditions are as follows: temperature is 550°C, pressure is 0.1MPa, ammonia partial pressure is 0.01MPa, and the treatment time is 1 hour. Carrier containing Y-type molecular sieve Y2;

[0059] (3) The catalyst carrier obtained in step (2) is impregnated with an aqueous solution containing tungsten and nickel, dried at 110°C for 5 hours, and calcined at 500°C for 5 hours to prepare the hydrocracking catalyst C2 of the present invention.

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Abstract

This invention discloses a hydrocracking method.It includes that the heavy distillate oil and poor quality catalytic cracking diesel refining separately by hydrogenation, and the mixture enters into hydrocracking reactivator, then its cracking products is conducted gas liquid separation. Light naphtha, heavy naphtha, aviation kerosene, diesel oil and end oil will be obtained by distillating the liquid phase. The density of the poor quality catalytic cracking diesel oil is above 0.9g/ml, and the aromatic hydrocarbon is over 60wt% and the value of hexadecane is under 30. It is a adequate utilization of catalytic cracking craft to produce High aromatic hydrocarbon heavy naphtha and high quality end oil with heavy distillate oil and poor quality catalytic cracking diesel, which can be separately used as catalytic reforming material and making ethylene material by steam cracking method. High aromatic hydrocarbon heavy naphtha in this invention will produce a large amount of reforming hydrogen after catalytic reforming treatment, which can be used in the process of hydrocracking to make this preparation more ecnomical and reasonable.

Description

Technical field [0001] The invention relates to a hydrocracking method, in particular to a hydrocracking method that can effectively treat poor-quality catalytically cracked diesel. Background technique [0002] As crude oil becomes increasingly heavy and inferior, and the market's demand for heavy oil decreases, the demand for light oil increases, and the degree of deep conversion of heavy residues continues to increase. Among them, catalytic cracking is one of the important means to lighten heavy residues. However, the properties of products obtained by catalytic cracking are generally poor and require further processing to obtain qualified products. Diesel fractions obtained by catalytic cracking generally have the characteristics of high aromatics content, low cetane number, high sulfur and nitrogen content, etc., which are difficult to directly use as products, and it is difficult to effectively improve the quality of their products by normal processing methods. [0003] At ...

Claims

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Application Information

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IPC IPC(8): C10G65/12
Inventor 戴宝华吴子明胡江青刘涛屠伟龙赵玉琢白振民孙洪江
Owner CHINA PETROLEUM & CHEM CORP
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