Method for processing ethylene tar

A technology of ethylene tar and processing method, which is applied in the petroleum industry, hydrotreating process, hydrocarbon oil treatment, etc. It can solve the problems that the ethylene tar fraction cannot be processed and has not been effectively processed, so as to save equipment investment and reduce the temperature rise of the device , the effect of reducing the content of aromatics

Active Publication Date: 2014-01-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Method for processing ethylene tar

Examples

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Effect test

Embodiment 1

[0046] 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.

[0047] 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

[0049] Compared with Example 1, the volume ratio of FZC-103:3936:HDC-1:hydrocracking catalyst A2 used becomes: 8:15:20:57. The operating conditions and the reaction results after 3000 hours of operation are shown in Table 3 .

Embodiment 3

[0051] 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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Abstract

The invention discloses a method for processing ethylene tar. Aiming at the characteristic of high contents of colloid, asphaltene and carbon residue in the ethylene tar, the method comprises the following steps of: performing fractional distillation on the ethylene tar to obtain light and heavy fractions, and treating heavy fractions by adopting a solvent deasphalting method to obtain deasphalted oil and deoiled asphalt; and mixing the deasphalted oil, the light fraction of the ethylene oil and hot low-grade oil, and making the mixture pass through a hydrogenation protecting reaction area, a hydrogenation refining reaction area and a hydrocracking reaction area in turn to obtain hydrocracking crude oil, wherein partial hydrocracking crude oil is circulated and mixed with the deasphalted oil and the light fraction of the ethylene tar to enter the hydrogenation reaction areas, the rest hydrocracking crude oil is separated to form gasoline and diesel fractions, and the deoiled asphalt serves as a general carbon fiber asphalt material. By the method, the problem of high temperature rise of a hydrogenation reactor bed can be effectively solved, full fractions of the ethylene tar are fully utilized, and the added value of the ethylene tar is improved.

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 amount of aromatic hydrocarbons and colloids is greater than 90%, and the density (20°C) is greater than 1.0...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/00
Inventor 许杰
Owner CHINA PETROLEUM & CHEM CORP
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