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A kind of catalytic diesel reaction distillation method

A technology for catalyzing diesel oil and reactive distillation, which is applied in the petroleum industry, hydrocarbon oil treatment, hydrotreating process, etc., can solve the problems of fast catalyst deactivation, small heating space, short operation period, etc., and achieves high hydrogen utilization rate, The effect of improving the reaction speed and simplifying the process

Active Publication Date: 2015-09-30
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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  • A kind of catalytic diesel reaction distillation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] 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.

[0058] 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

[0060] The present embodiment prepares hydrocracking catalyst C1, and concrete steps are as follows:

[0061] (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.

[0062] (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.

[0063] (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 pr...

Embodiment 3

[0065] This embodiment prepares hydrocracking catalyst C2, and concrete steps are as follows:

[0066] (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.

[0067] (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.

[0068] (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 invention discloses a reaction distillation method of catalytic diesel oil. The method is used for processing catalytic diesel oil to produce naphtha with a high octane number and high-quality diesel oil; the equipment comprises a reaction distillation column and a hydrogen circulation system; a stripping section of the reaction distillation column is a packed column and packed with a hydrocracking catalyst, and a rectifying section is equipped with a rectifying column plate. The naphtha fraction is obtained at the column top, and the diesel oil fraction is obtained at the column bottom. The method of the invention makes full use of the characteristics of hydrocracking and reaction distillation technology, reduces the secondary reaction of light fractions, and improves the hydrogenation reaction depth of the inferior diesel oil fraction. The method of the invention adopts inferior catalytically-cracked diesel oil as a raw material to produce naphtha with a high octane number and high-quality diesel oil which can be used respectively as a blending component of gasoline with a high octane number and a blending component of high-quality diesel oil; when compared with traditional hydrogenation technology, the method of the invention omits the product fractionating tower, is simpler and more energy-saving in process flow.

Description

technical field [0001] The invention relates to a catalytic reaction distillation method, in particular to a reaction 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 qual...

Claims

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Application Information

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