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Hydro-cracking method for blending ethylene bottom oil

A technology of ethylene tar refining and hydrocracking, which is applied in the field of hydrocracking of vacuum gas oil blended with ethylene tar to produce light fuel oil. Raw material sources, increased saturation rate, and even effects of exothermic reaction

Active Publication Date: 2012-11-21
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method only utilizes the light fraction which accounts for a small proportion in ethylene tar, and more than 80% of the ethylene tar fraction has not been effectively treated; at the same time, the hydrorefining conditions it provides cannot handle ethylene with a boiling point higher than 280 ° C. tar fraction

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～3

[0035] The properties of the ethylene tar light fraction and VGO raw materials used are shown in Table 2.

[0036] The hydrogenation protection catalyst used in this example is FZC-103, and the hydrogenation refining catalyst used is 3936. This embodiment adopts a series hydrogenation process, two reactors, the first reactor is filled with a hydrogenation protection catalyst and a hydrofining catalyst, and the second reactor is filled with a hydrogenation carbon removal catalyst and a hydrocracking catalyst. The operating conditions and reaction results used are shown in Table 3.

Embodiment 4

[0047] The heavy fraction of ethylene tar is heat-treated at 380°C under normal pressure for 20 minutes to obtain mesophase pitch; the mesophase pitch is melt-spun with a pneumatic spinning machine, and the spun pitch fiber is oxidized by air at 300°C-400°C to form The fibers were not melted, and then carbonized into carbon fibers at 1000°C under nitrogen. The properties of the obtained pitch-based carbon fibers are shown in Table 5.

[0048] Table 4 Properties of ethylene tar heavy fraction

[0049] crude oil name Ethylene tar heavy fraction (>430℃) carbon to hydrogen ratio 1.07 Softening point / ℃ 225 Quinoline insoluble matter / % 0.60

[0050] Table 5 Properties of pitch-based carbon fibers

[0051] project Carbon Fiber from Heavy Distillates Average strength / MPa 858 Average modulus / GPa 50.5 Elongation at break / % 1.85

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PUM

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Abstract

The invention discloses a hydro-cracking method for blending ethylene bottom oil, which is different from the method for processing the conventional ethylene bottom oil and comprises the following steps: blending an ethylene bottom oil light end into a conventional hydro-cracking raw material for hydro-cracking, in the presence of hydrogen, sequentially contacting the ethylene bottom oil light end with a hydro-guard catalyst, a hydro-refining catalyst, a hydro-residue carbon removing catalyst and a hydro-cracking catalyst; separating an effluent of hydro-cracking reaction to obtain light fueloil. The method of the invention adopts a method of grading the hydrogenation catalyst, can process the ethylene bottom oil light end and produce diesel oil having a high cetane number and a low condensation point and a naphtha having high arene, and is not obviously changed in a BMCI value of tail oil and a smoke point of a jet fuel when compared with the conditions before blending the ethylene bottom oil.

Description

technical field [0001] The invention relates to a method for producing clean fuel by hydrogenation treatment of ethylene tar, in particular to a method for production of light fuel oil by hydrocracking of vacuum gas oil (VGO) blended with ethylene tar. Background technique [0002] The increasing shortage of world oil resources and the increasing price make it necessary for refineries to reduce emissions and increase efficiency. Ethylene tar is currently mainly sold as heavy fuel oil or carbon black raw materials, with low added value. [0003] Ethylene tar is a high-temperature condensation product of raw materials and products in the steam cracking process of ethylene cracking raw materials. Its initial boiling point is 170-260°C, and its final boiling point is >600°C, generally 600-700°C. It belongs to the heavy fraction range. Ethylene tar is mainly a mixture of double-ring and above condensed-ring aromatics, the content of aromatics is more than 90%, and the density ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G47/02C10G47/04
Inventor 刘平许杰张忠清王立言
Owner CHINA PETROLEUM & CHEM CORP
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