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Method for producing ultra-low sulfur diesel

A technology for ultra-low-sulfur diesel and diesel oil, which is applied in the petroleum industry, hydrocarbon oil treatment, and hydrotreating processes, etc. It can solve the problems of no coordination effect of active metals, poor interaction catalyst strength, and high catalyst metal content. Reduce construction investment and operating costs, increase the saturation depth of aromatics, and increase the effect of cetane number

Active Publication Date: 2008-10-08
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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 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

[0033] 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

[0035] 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 invention relates to a method of producing ultra-low sulfur diesel. The diesel distillate is used as raw oil; the single stage or a stage of series process flow is adopted; the feed stock is mixed with hydrogen to pass the hydrogenation reaction area; under the operating condition of hydrorefining, the quality of diesel is improved greatly; wherein, at least one of the catalysts in the hydrogenation reaction area is bulk phase catalyst; the bulk phase catalyst is composed of composite oxide NixWyO z and oxide MoO3 with the weight ratio of 1:10-10:1; the composite oxide NixWyO z and oxide MoO3 account for 40%-100% of the total weight of the catalyst combination. Compared with the prior art, the method of producing ultra-low sulfur diesel in the invention can reduce the operation severity of the hydrorefining reaction area effectively, improve the processing load of the device, prolong the service life of the catalyst or produce the ultra-low sulfur diesel directly.

Description

technical field [0001] The invention relates to a method for producing ultra-low-sulfur diesel oil. A suitable catalyst is selected to reduce the sulfur content of the diesel oil to below 10ppm. Background technique [0002] Refiners are challenged by stringent clean fuel specifications and increasing global competition. Due to market demand, it is necessary to improve product quality and product structure; environmental protection regulations are becoming increasingly stringent, and the restrictions on the content of harmful gases such as NOx and SOx in exhaust gases from motor vehicles are more stringent. Therefore, low-sulfur diesel oil is the development trend of new diesel specifications in countries and regions around the world. It is expected that in 2009, EU regulations will limit the sulfur content of vehicle diesel to below 10 μg / g, and the United States will also limit the sulfur content of vehicle diesel in 2007. The content is below 15μg / g. How to economically...

Claims

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Application Information

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IPC IPC(8): C10G45/08C10G65/04
Inventor 李扬王震徐学军刘继华刘涛徐大海
Owner CHINA PETROLEUM & CHEM CORP
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