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Method for processing ethylene tar

A technology for ethylene tar and a treatment method, which is applied in the treatment of hydrocarbon oil, hydrotreating process, petroleum industry, etc., can solve the problems of inability to treat ethylene tar fractions, not being effectively treated, etc., achieving safe and stable operation, and improving the saturation rate. , to avoid the effect of excessive temperature rise

Active Publication Date: 2013-08-28
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

[0040] Fractional distillation of ethylene tar into light fraction and heavy fraction, with a cut point of 430°C, wherein the heavy fraction is deasphalted with propane, the conditions are as follows: propane is used as solvent, the weight ratio of solvent to heavy fraction is 5:1, solvent extraction tower The pressure is 3.5MPa, the extraction temperature is 65°C, and the weight yield of deasphalted oil is 40%. The properties of deasphalted oil and light fraction mixed oil are shown in Table 2, and the properties of deoiled asphalt after deasphalting of ethylene tar heavy fraction are shown in Table 4.

[0041] The embodiment adopts a serial flow process and two reactors, the first reactor is equipped with hydrogenation protection agent FZC-103 and hydrofining catalyst 3936, and the second reactor is filled with hydrogenation carbon removal catalyst HDC-1, The lower part is loaded with hydrocracking catalyst A1 containing amorphous silica-alumina and Y molecular sieve. In Ex...

Embodiment 2

[0043] Compared with Example 1, the volume ratio of FZC-103: 3936: HDC-1: hydrocracking catalyst A2 used becomes: 8: 15: 20: 57, and the reaction results after operating conditions and running for 3000 hours are shown in Table 3 .

Embodiment 3

[0045] Compared with Example 1, the volume ratio of FZC-103: 3936: HDC-1: hydrocracking catalyst B1: used becomes: 8: 15: 10: 67. The operating conditions and the reaction results after running for 3000 hours are shown in the table 3.

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PUM

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Abstract

The invention discloses a method for processing ethylene tar. In the method, according to the characteristic that the colloid, asphaltene and carbon residue content in carbon residue is high, light and heavy fractions are separated from ethylene tar by distillation first, then the heavy fraction is processed by a solvent deasphlating process to form deasphalted oil and de-oiled asphalt, the deasphalted oil is mixed with ethylene tar, the mixture passes through a hydrogenation protective reaction area, a hydrogenation refining reaction area and a hydrogenation cracking reaction area in turn toform gasoline and diesel oil fractions, and the de-oiled asphalt is used as a universal carbon fiber asphalt raw material. The method disclosed by the invention makes all fractions of the ethylene tar fully utilized and improves the added value of ethylene tar.

Description

technical field [0001] The invention relates to a method for processing ethylene tar, in particular to a method for processing ethylene tar by using a hydrocracking process. 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 aromatic hydrocarbons with more than two rings and condensed rings, the total weight content of aromatic hydrocarbons and colloids is greater than 90%, and the density (20°C) is greater ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/04
Inventor 许杰
Owner CHINA PETROLEUM & CHEM CORP