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Combined hydrocracking method

A hydrocracking and hydrotreating technology, applied in hydrocarbon oil cracking, petroleum industry and other directions, can solve the problems of large hydrogen consumption, lack of economic rationality, difficult to effectively treat, etc., and achieve the effect of low BMCI value

Active Publication Date: 2007-07-25
CHINA PETROLEUM & CHEM CORP +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is generally difficult to effectively treat this kind of inferior catalytic cracked diesel oil by the above-mentioned hydrogenation method, and because the hydrogen consumption in the processing process is too large, it is not economically reasonable

Method used

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  • Combined hydrocracking method

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preparation example Construction

[0033] 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, preferably 500-600°C, pressure 0-600°C 0.2MPa, where the partial pressure of ammonia is 0-0.05MPa, and the treatment time is 0.5-3.0 hours to obtain a carrier; the catalyst carrier is impregnated with a solution containing active metal, dried and roasted 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,...

preparation Embodiment 1

[0040] The present embodiment prepares hydrocracking catalyst I, and concrete steps are as follows:

[0041] (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 I;

[0042] (2) get the Y type molecular sieve I of 153.5 gram step (1) gained, by 120 gram small hole alumina (pore volume 0.47ml / g, specific surface area is 280m 2 / g), 0.2N dilute nitric acid solution 440ml peptized binder mixes, after extruding, molding, then through 110 ℃ of drying 5 hours, 600 ℃ of roasting 6 hours obtain catalyst carrier;

[0043] (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 I of the present invention...

preparation Embodiment 2

[0045] This embodiment prepares hydrocracking catalyst II, and concrete steps are as follows:

[0046] (1) 170g Y-type molecular sieve precursor A1 is mixed with the adhesive (same as implementation 2) prepared by peptizing 80g of small-pore alumina and dilute nitric acid solution, extruded and formed;

[0047](2) Use ammonia-water vapor to treat the molded product obtained in step (1) 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 Carrier, which contains Y-type molecular sieve II;

[0048] (3) impregnating the catalyst carrier obtained in step (2) with an aqueous solution containing tungsten and nickel, drying at 110° C. for 5 hours, and calcining at 500° C. for 5 hours to prepare the hydrocracking catalyst II of the present invention.

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Abstract

This invention relates to a hydrogenation cracking method. The method comprises: hydrogenating inferior catalytically cracked diesel oil, mixing the hydrogenation products with VGO and other raw materials, introducing into a second hydrogenation cracking zone, and separating to obtain light products and hydrogenation tail oil. The inferior catalytically cracked diesel oil is obtained by hydrogenation-transfer catalytic cracking of heavy oil and residual oil, and has such characteristics of high density, high polycyclic aromatic hydrocarbon content, and low hexadecane number. The method combines inferior catalytically cracked diesel oil and VGO, and can produce large quantities of high-quality heavy naphtha with high content of aromatic hydrocarbon, and tail oil with low MCI value.

Description

technical field [0001] The invention relates to a combined hydrocracking method, in particular to a combined 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 pr...

Claims

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Application Information

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IPC IPC(8): C10G47/00
Inventor 胡江青刘涛曾茜戴宝华赵玉琢李立权钱溢黄新露孙洪江潘德满
Owner CHINA PETROLEUM & CHEM CORP
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