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Diesel oil fraction upgrading and pour point reducing process

A technology of diesel oil and distillate, which is applied in the direction of refining to remove heteroatoms, etc., can solve the problems of high catalyst metal content, loss of active components, and restrictions on popularization and application, so as to reduce construction investment and operation costs, increase cetane number, The effect of lowering the operating temperature

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] CN1171430A has introduced a kind of adopting medium-pressure hydrocracking method, although the cetane number of diesel oil can be greatly improved, because a considerable part of diesel oil is converted into naphtha fraction, diesel product yield is reduced, and this and The current market demand for increasing the diesel-to-gasoline ratio is contradictory, so its promotion and application are limited
The use of hydrogenation decondensation technology to produce low-point diesel oil can greatly reduce the freezing point of diesel products, but compared with the requirements for the production of clean fuels, there are still some deficiencies, such as: the cetane number of diesel products cannot be significantly increased, and cannot be significantly reduced Diesel product density and T95, diesel product yield is low, by-product naphtha olefin content is high

Method used

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  • Diesel oil fraction upgrading and pour point reducing process
  • Diesel oil fraction upgrading and pour point reducing process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 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

[0037] 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

[0039] 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 diesel oil fraction upgrading and pour point reducing process has the mixture of diesel oil material and hydrogen passing through the hydroupgrading reaction region to result in diesel oil with low solidification point through reaction under certain condition. The catalyst in the hydroupgrading reaction region 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, and at least one kind of upgrading catalyst containing beta-zeolite. The present invention can lower the solidification point, 95 vol% point temperature and sulfur content of diesel oil, and raise cetane number and oxidation stability under mild condition.

Description

technical field [0001] The invention relates to a method for modifying and decondensing diesel fractions, in particular to a method for producing high-quality diesel oil through hydrogenation, modification, isomerization and decondensation of diesel fractions by using a catalyst with strong hydrogenation performance. 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. [0003] Secondary processing technologies such as catalytic cracking, coking, visbreaking and wax oil hydrotreating widely exist in oil refining enterprises, but the distillates obtained by these processes basically cannot be directly shipped as products, and need to be post-treated. The commonly used post-treatment process is hydrofining...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G45/08
Inventor 刘涛李宝忠曾榕辉李扬赵玉琢石友良潘德满韩颖
Owner CHINA PETROLEUM & CHEM CORP
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