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Catalytic diesel fuel reaction distillation method

A technology for catalyzing diesel oil and reactive distillation, which is used in the petroleum industry, hydrocarbon oil treatment, hydrotreating process, etc., can solve the problems of small heating space, short operation period, fast catalyst deactivation, etc., to reduce the gas yield, Simple process and high hydrogen utilization rate

Active Publication Date: 2015-05-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem with this technology is that under the premise of ensuring the gasoline yield and octane number, the catalyst is deactivated quickly, the heating space is small, and the operating cycle of the device is short
In conclusion, there is no known method for catalytic distillation due to hydrocracking of diesel fractions

Method used

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  • Catalytic diesel fuel reaction distillation method

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Experimental program
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Effect test

Embodiment 1

[0060] Weigh raw material NH 4 NaY type 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 grams, add 9 liters of distilled water to make a slurry, and heat the slurry to 95 ° C under stirring conditions; add dropwise 495.0 grams of ammonium hexafluorosilicate to the above slurry The solution prepared with 3500 ml of distilled water was dripped in 2 hours, then continued to stir at 95°C for 2 hours, stopped stirring and allowed to stand for about 10 minutes, separated the precipitated fluoro(silicon)ammonium aluminate sodium crystals by decantation, And after washing with water and drying, the Y-type molecular sieve precursor A1 is obtained.

[0061] Weigh raw material NH 4 NaY type molecular sieve (ammonium exchange degree is 75%, burning weight loss is 26%, SiO 2 / Al 2 o 3 The molar ratio is 4.5, the sodium oxide content is 4.0wt%) 270 grams, add 1.2 liters of...

Embodiment 2

[0063] This embodiment prepares hydrocracking catalyst C1, and concrete steps are as follows:

[0064] (1) The Y-type molecular sieve precursor A1 was subjected to hydrothermal treatment, and the hydrothermal treatment conditions were as follows: the temperature was 600° C., the water pressure was 0.1 MPa, and the treatment time was 1 hour to obtain the Y-type molecular sieve Y1.

[0065] (2) Take 30.6 grams of the Y-type molecular sieve Y1 obtained in step (1), made of 240 grams of small-pore alumina (pore volume 0.47mL / g, specific surface area 280m 2 / g), 0.2N dilute nitric acid solution 440mL peptized binder mixed, extruded and shaped, then dried at 110°C for 5 hours, and calcined at 600°C for 6 hours to obtain a catalyst carrier.

[0066] (3) The catalyst carrier obtained in step (2) was impregnated with an aqueous solution containing molybdenum and nickel, dried at 110°C for 5 hours, and calcined at 500°C for 5 hours to prepare the hydrocracking catalyst C1 of the present i...

Embodiment 3

[0068] This embodiment prepares hydrocracking catalyst C2, and concrete steps are as follows:

[0069] (1) Mix 68g of Y-type molecular sieve precursor A1 with a binder prepared by peptizing 160g of small-pore alumina and dilute nitric acid solution (same as in implementation 2), extrude and shape.

[0070] (2) Treat the molded product obtained in step (1) with ammonia-water vapor at high temperature, the treatment conditions are as follows: temperature 550°C, pressure 0.1MPa, ammonia partial pressure 0.01MPa, treatment time 1 hour, obtained The carrier contains Y-type molecular sieve Y2.

[0071] (3) The catalyst support 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

The present invention discloses a catalytic diesel fuel reaction distillation method. According to the method, equipment mainly comprises a reaction distillation tower and a hydrogen circulation system, the stripping section of the reaction distillation tower adopts a hydrocracking catalyst as a filler, the rectification section is provided with the rectification tower plate, the tower plate can be provided with an isomerization catalyst, one part of the tower bottom oil is circulated to the material inlet of the tower, the remaining part is discharged out from the equipment and is adopted as the product, a hydrogen circulation heating furnace is arranged, the heated hydrogen gas enters the bottom of the tower, and the gasoline distillate is obtained from the top of the tower. With the method, the characteristics of the hydrocracking and the reaction distillation process are completely utilized so as to reduce the secondary reaction of the light distillates and improve the hydrogenation reaction speed of the gasoline distillate. According to the present invention, the poor-quality cracking diesel fuel is adopted as the raw material to produce the high octane number naphtha and the high-quality diesel fuel, such that the obtained products can respectively be adopted as the blending component of the high octane number naphtha and the blending component of the high-quality diesel fuel; and compared with the conventional hydrogenation process, the method of the present invention has characteristics of simple process and energy saving.

Description

technical field [0001] The invention relates to a catalytic distillation method, in particular to a reactive distillation method capable of effectively treating inferior catalytic cracking diesel oil. Background technique [0002] Crude oil is becoming increasingly heavy and inferior, the market demand for heavy oil is decreasing, the demand for light oil is increasing, and the degree of deep conversion of heavy residual oil is continuously increasing. Catalytic cracking is one of the important means in the lightening of many heavy oils. However, the properties of the products obtained by catalytic cracking are generally poor, and further processing is required to obtain qualified products. The diesel fraction obtained from catalytic cracking generally has the characteristics of high aromatics content, low cetane number, high sulfur and nitrogen content, and it is difficult to directly use it as a product, and it is difficult to effectively improve its product quality by or...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/02
CPCC10G67/02
Inventor 赵玉琢
Owner CHINA PETROLEUM & CHEM CORP
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