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Two-stage hydrocracking process

A hydrocracking and hydroprocessing pretreatment technology, which is applied in hydroprocessing technology, petroleum industry, and hydrocarbon oil treatment, etc., can solve the problems of shortened service life of catalysts, loss of active components, increased operating severity, etc., to reduce The effect of construction investment and operating costs, reducing the content of organic nitrogen, and increasing the saturation capacity of aromatic hydrocarbons

Active Publication Date: 2007-12-19
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high metal content of the catalyst prepared by this method, there is often a lack of sufficient interaction between the metal and alumina, resulting in poor catalyst strength
The active component is composed of a large amount of metals, and some internal metal components cannot be fully utilized during the formation of Ni-Mo or Ni-Mo-W powder, resulting in the loss of active components, which cannot be solved by simple bonding
CN1342102A discloses a mixed metal catalyst, which is obtained by co-precipitating three active metals. Its main disadvantage is that no coordination effect between different active metals has been found
This method does not allow good coordination of dissimilar metals
[0005] US4940530, US5013422, US5018580, US6595155 etc. have introduced a kind of two-stage hydrocracking method, and the pretreatment catalyst used in its first stage reaction zone is conventional catalyst, owing to be subject to the influence that raw material oil becomes heavier and worse day by day, use existing For hydrocracking units, the operating severity increases, which shortens the service life of the catalyst, and is forced to reduce the processing capacity, or the newly-built unit needs to increase the amount of catalyst

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0036] Add 1000mL of water into the reaction tank, then add 40g of nickel chloride to dissolve, then add 52g of ammonium metatungstate to dissolve, then add 5g of zirconium oxychloride to dissolve, then add 10% ammonia water to form a gel until the pH value is 8, and then gel The temperature is 50°C, aging for 1 hour after forming the gel, and then filtering, adding 600ml of clean water, 16g of molybdenum trioxide and 32g of aluminum hydroxide to the filter cake, beating and stirring evenly, filtering, drying the filter cake at 80°C for 5 hours, and then extruding Molded, washed 3 times with clean water, dried at 120°C for 5 hours, and calcined at 500°C for 4 hours to obtain the final catalyst A. The composition and main properties are shown in Table 1.

Embodiment 2

[0038] According to the method of Example 1, according to the component content ratio of catalyst B in Table 1, add aluminum chloride, nickel chloride, sodium tungstate in the reaction tank, then add 16% ammonia water to form a gel, until the pH value is 9 , the gelling temperature is 80°C, aging for 3 hours after gelling, then filtering, washing the filter cake twice with 500mL clean water, adding clean water and molybdenum trioxide, beating and stirring evenly, filtering, and drying the filter cake at 70°C for 7 hours , and then extruded, washed twice with clean water, dried at 100°C for 8 hours, and calcined at 550°C for 3 hours to obtain the final catalyst B. The composition and main properties are shown in Table 1.

Embodiment 3

[0040] According to the method of Example 1, according to the component content ratio of catalyst C in Table 1, nickel nitrate, ammonium metatungstate, aluminum hydroxide, silica sol are added to the reaction tank, and then 12% ammonia water is added to form a gel until the pH The value is 10, the gelling temperature is 60°C, aging for 2 hours after gelling, then filtering, adding molybdenum trioxide to the filter cake, beating and stirring evenly, filtering, drying the filter cake at 120°C for 1 hour, and then extruding into strips, wet strips It was dried at 130°C for 3 hours and calcined at 600°C for 3 hours to obtain the final catalyst C, whose composition and main properties are shown in Table 1.

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Abstract

The two-stage hydrocracking process has the VGO and / or other heavy fraction oil as the material oil hydrocracked under certain condition to obtain high quality clean product. The catalyst in the first stage of pre-treatment includes at least one kind of bulk phase catalyst comprising complex oxide NixWyOz and oxide MoO3 in the weight ratio 0.1-10 and accounting for 40-100 wt% of total catalyst. The present invention facilitates the hydrocracking operation, increases the treating capacity of the apparatus, increases the service life of the catalyst and raises the quality of the product.

Description

technical field [0001] The invention relates to a two-stage hydrocracking method, in particular to a method of using a pretreatment catalyst with strong hydrogenation performance and adopting a two-stage hydrocracking process to produce clean light oil products from vacuum distillate oil. Background technique [0002] With the increasingly stringent environmental regulations, the quality requirements for motor fuel are getting higher and higher. Motor vehicle exhaust is an important part of urban air pollution sources. Therefore, the quality requirements for urban motor vehicle motor fuels are more stringent. The vast majority of motor fuel is obtained from petroleum, which is obtained through various processing methods. Among these processing methods, hydrocracking process is the most direct and effective method to produce high-quality products from inferior heavy raw material oil. Therefore, hydrocracking technology has been paid attention to and developed rapidly all ov...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G65/10
Inventor 刘涛李宝忠曾榕辉白振民赵玉琢张学辉孙薇姜海涛
Owner CHINA PETROLEUM & CHEM CORP
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