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Hydrocracking method of midbarrel oil circulation

A hydrocracking and hydrotreating technology, applied in hydrotreating process, petroleum industry, treatment of hydrocarbon oil, etc., can solve the problems of high production cost, large hydrogen consumption, no economic advantages, etc., and achieves low BMCI value, High yield and the effect of rational utilization

Active Publication Date: 2009-07-15
CHINA PETROLEUM & CHEM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this kind of low-quality FCC diesel oil can also be treated by the above method, the hydrogen consumption in the hydrogenation process of converting this kind of diesel oil into qualified fuel is huge, usually above 4w%, resulting in high production costs and no economic advantages

Method used

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  • Hydrocracking method of midbarrel oil circulation
  • Hydrocracking method of midbarrel oil circulation
  • Hydrocracking method of midbarrel oil circulation

Examples

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Effect test

preparation example Construction

[0037] The second preparation method of the hydrocracking catalyst recommended by the present invention is as follows: the Y-type molecular sieve precursor is mixed with the binder obtained by the peptization of small-pore alumina and dilute nitric acid solution, extruded, and formed, wherein the mixing process Selectively add macroporous alumina and / or amorphous silica-alumina; treat the above molded product at high temperature with water vapor or ammonia-water vapor, the treatment conditions are as follows: temperature 400-700°C, pressure 0-0.2MPa, ammonia gas The partial pressure is 0-0.05 MPa, and the treatment time is 0.5-3.0 hours to prepare the carrier; the catalyst carrier is impregnated with the solution containing active metal, dried and calcined to prepare the hydrocracking catalyst of the present invention. Wherein, after the mixture containing the Y-type molecular sieve precursor is treated with water vapor or ammonia gas-high temperature, the Y-type molecular siev...

Embodiment 1

[0043] Example 1 prepared Y-type molecular sieve, and Examples 2-5 prepared the two-stage hydrocracking catalyst of the present invention. The properties of the obtained Y molecular sieve and hydrocracking catalyst are listed in Tables 1 and 2, respectively.

[0044] Example 1

[0045] Weigh raw material NH 4 NaY type molecular sieve (ammonium exchange degree is 80%, weight loss on ignition is 27.1%, SiO 2 / Al 2 o 3 Molar ratio is 5.3, sodium oxide content is 4.0wt%) 2057.6 grams, add 9 liters of distilled water to make slurry, and under stirring condition, heat slurry and be warmed up to 95 ℃; Add dropwise by 495.0 grams of ammonium hexafluorosilicate The solution prepared with 3500 milliliters of distilled water was dripped in 2 hours, then continued to stir at 95° C. for 2 hours, stopped stirring and stood for about 10 minutes, and separated the precipitated sodium ammonium fluoride (silicon) aluminate crystals by decantation. And after washing with water and drying, th...

Embodiment 2

[0048] The present embodiment prepares hydrocracking catalyst C1, and concrete steps are as follows:

[0049] (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.

[0050] (2) Get the Y-type molecular sieve Y1 of 153.5 grams of step (1) gained, by 120 grams of small hole alumina (pore volume 0.47ml / g, specific surface area is 280m 2 / g), 0.2N dilute nitric acid solution 440ml peptized binder mixed, after extrusion, molding, then through 110 ℃ of drying 5 hours, 600 ℃ of roasting 6 hours obtain catalyst carrier,

[0051] (3) impregnating the catalyst carrier 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 the hydrocracking catalyst C1 of the present i...

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Abstract

The invention discloses a method for hydrocracking inferior catalytic cracking diesel oil. In the method of the present invention, after mixing inferior diesel fuel with heavy hydrocracking raw materials, hydrocracking is first performed, and the obtained middle distillate is subjected to two-stage hydrocracking to obtain high-aromatic latent heavy naphtha and tail oil with low BMCI value. Since the middle distillate obtained in the first stage has been freed of impurities such as sulfur and nitrogen, the catalyst activity has been fully exerted, so it can be operated at a higher space velocity and lower temperature, even at a lower hydrogen partial pressure, which is economical Sex is improved. Moreover, the lower hydrogen partial pressure helps the middle distillate to convert into heavy naphtha with high aromatic potential, and the lower temperature reduces the further cracking of heavy naphtha, thereby greatly improving the yield of heavy naphtha.

Description

technical field [0001] The invention relates to a hydrocracking method, in particular to a hydrocracking method capable of effectively treating inferior catalytic cracking diesel oil. Background technique [0002] As crude oil becomes heavier and inferior, and the market demand for heavy oil decreases and the demand for light oil increases, the degree of deep conversion of heavy residual oil continues to increase. Among them, catalytic cracking is one of the important means of lightening heavy residue oil. However, the properties of the products obtained by catalytic cracking are generally poor, and generally require further treatment 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 ordinary processing methods. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G65/12
Inventor 曾榕辉戴宝华刘涛胡江青石友良洪波吴子明黄新露
Owner CHINA PETROLEUM & CHEM CORP
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