Two-stage hydrocracking method

A hydrocracking and hydrotreating technology, which is applied in the fields of hydrotreating process, petroleum industry, and hydrocarbon oil treatment, can solve the problems of high production cost, large hydrogen consumption, and no economic advantages, and achieve the effect of effective processing

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

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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  • Two-stage hydrocracking method

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Experimental program
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Effect test

preparation example Construction

[0032] The preparation method of the modified Y zeolite described therein is: use NaY as raw material, carry out ion exchange with non-precious metal water-soluble salts, the specific conditions are: adjust the pH value to 2-8 with acid or ammonia water, use non-precious metal Water-soluble salts are exchanged for 1 to 5 times; after the last exchange, wash with distilled water for 1 to 3 times, and then dry at 100-150°C. The dried zeolite is subjected to hydrothermal treatment, ammonium ion exchange, acid washing, filtration and water washing, and Dry at 100-150°C for 1-48 hours to obtain the modified Y zeolite.

[0033] In the noble metal hydrocracking catalyst, since the ion-exchanged non-noble metal has a high dispersion degree and further isolates the noble metal, the dispersion degree of the noble metal is further improved. Simultaneously, because the contained non-noble metal itself is a kind of hydrogenation active metal, and the hydrogenation activity of non-noble met...

Embodiment 1

[0037] Take a certain amount of nickel nitrate and dissolve it in water to prepare a solution with a concentration of 10gNiO / 100ml, dilute 70ml of the above aqueous solution with distilled water to 1000ml, add 250g of NaY zeolite (80wt% on a dry basis), and heat to 70°C for 2 hours. Repeat the exchange 2 times. After the second exchange, filter and wash 3 times with water, then dry at 110°C for 8 hours, and put it into a hydrothermal treatment furnace at 550°C for 6 hours. The water vapor partial pressure is 0.05MPa. Put Y zeolite after hydrothermal treatment into 1000ml 1N ammonium nitrate / nitric acid aqueous solution (pH=2) for ammonium exchange, pickling for 2 hours, temperature 70°C, after pickling, filter and wash 3 times with water, then dry at 110°C for 8 hours to obtain Modified Y zeolite.

[0038] The above-mentioned modified Y zeolite 140g (dry basis 86wt%) and 150g binding agent (SB-Al 2 o 3 It is prepared by beating with an appropriate amount of dilute nitric aci...

Embodiment 2

[0041] Take a certain amount of cobalt nitrate and dissolve it in water to prepare a solution with a concentration of 10gCoO / 100ml. Dilute 150ml of the above solution with distilled water to 1000ml, add 250g of NaY zeolite (80wt% on a dry basis), and heat to 90°C for 2 hours. Repeat the exchange 2 times. After the second exchange, filter and wash 3 times, then dry at 110°C for 4 hours, and put it into a hydrothermal treatment furnace for 4 hours at 650°C. The partial pressure of water vapor is 0.15MPa. Put Y zeolite after hydrothermal treatment into 1000ml 1N ammonium nitrate / nitric acid aqueous solution (pH=2) to carry out ammonium exchange, pickling for 4 hours, temperature 90 ℃, after pickling, filter and wash 3 times with water, then dry at 110 ℃ for 8 hours, get Modified Y zeolite.

[0042] The above-mentioned modified Y zeolite 117g (dry basis 90wt%) and 225g binding agent (SB-Al 2 o 3 Prepared by beating with an appropriate amount of dilute nitric acid, kneading with ...

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Abstract

This invention discloses a poor quality catalytic cracking diesel hydrogenation method. This invention includes two stages hydrocracking dealing with catalytic cracking diesel, especially the poor quality catalytic cracking diesel from catalytic hydrogen transfer process. The density of the related poor quality catalytic cracking diesel is 0.90g / ml at 20deg.C, and its aromatic hydrocarbon is over 60wt%, and the value of hexadecane is less than 30. Mixing poor quality catalytic cracking diesel and heavy cracking material and conducting hydrogenation, hydrocracking is conducted after removal of sulphur, nitrogen and other impurities from reaction oil. It is a sufficient utilization of the feature that low hydrogen and high aromatic hydrocarbon content of catalytic cracking diesel to produce Gaofangqian heavy naphtha in order to realize the effective utilization of the poor quality catalytic cracking diesel.

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 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 ordinary processing methods. [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G65/12
Inventor 关明华戴宝华刘涛胡江青赵玉琢洪波白振民潘德满
Owner CHINA PETROLEUM & CHEM CORP
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