Method for hydrogenating ethylene tar

A technology of ethylene tar and processing method, which is applied in the fields of hydrotreating process, petroleum industry, and 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 achieve safe and stable operation and avoid temperature rise Excessively high, the effect of uniform exothermic reaction

Active Publication Date: 2012-12-26
CHINA PETROLEUM & CHEM CORP +1
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  • 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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  • Method for hydrogenating ethylene tar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～3

[0045] The properties of the light and heavy fractions of ethylene tar used are shown in Table 2 and Table 4. Example The ethylene tar light fraction is treated by a series process. Two reactors are used. The first reactor is equipped with a hydrogenation protection agent FZC-103 and a hydrofining catalyst 3936, and the upper part of the second reactor is filled with a hydrogenation carbon removal catalyst HDC. -3. The first hydrocracking catalyst loaded in the middle is a hydrocracking catalyst containing amorphous silica-alumina and Y molecular sieve, and the second hydrocracking catalyst loaded in the lower part is a hydrocracking catalyst containing amorphous silica-alumina and β molecular sieve . In the embodiment, the volume ratio of FZC-103:3936:HDC-3:first hydrocracking catalyst:second hydrocracking catalyst is as follows: 12:13:13:31:31. The results of the reaction are shown in Table 3. In addition, the device has been operated for 5,000 hours, and the distribution ...

Embodiment 4

[0053] The heavy fraction of ethylene tar (see Table 4 for properties) passes through the hydrogenation protection catalyst, the hydrogenation deresidue catalyst and the hydrogenation conversion catalyst in sequence, and its volume ratio is 8:55:37, wherein the hydrogenation protection catalyst used is FZC-100 and FZC-102B, its volume ratio is 1:2, and the hydrogenation conversion catalyst, such as the catalyst obtained in Example 1 of CN02109422.5, is recorded as ZH1, and its properties are shown in Table 5.

[0054] Table 5 Composition and properties of hydroconversion catalysts

[0055]

[0056] The loading volume ratio of HDC-1 and HDC-2 used for hydrodecarbonization catalyst is 4:6. The loading order of the hydrogenation catalyst for the heavy fraction of ethylene tar is as follows: FZC-100, FZC-102B, HDC-1, HDC-2, ZH1. In this example, the process conditions for the hydrogenation of heavy fractions are as follows: the reaction pressure is 16MPa, the reaction t...

Embodiment 5

[0058] Compared with Example 4, the loading volume ratio of the hydrodecarbonization catalyst HDC-1 and HDC-2 used was changed to 5:5, and the rest was the same as Example 4.

[0059] Table 6 Hydrogenation results of heavy fractions

[0060]

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Abstract

The invention discloses a method for hydrogenating ethylene tar, which selects an appropriate cutting point to fractionate the ethylene tar into a light fraction and a heavy fraction aiming at the characteristics of high content of arene, colloid, carbon residue and asphaltene in the ethylene tar. The light fraction passes through a hydrogenation protection catalyst, a hydrofining catalyst, a hydrogenation and carbon residue-removing catalyst and a hydrocracking catalyst sequentially to obtain a gasoline fraction and a diesel oil fraction; and the heavy fraction passes through the hydrogenation protection catalyst, the hydrogenation and carbon residue-removing catalyst and a hydro-conversion catalyst sequentially to obtain a gasoline fraction and a diesel oil fraction. According to the component characteristics of the light fraction and the heavy fraction of the ethylene tar, the method selects different hydrogenation schemes so as to convert the ethylene tar into fuel oil to a great extent, increase the additional value of the ethylene tar and make the device operate for a long time.

Description

technical field [0001] The invention relates to a method for hydrogenation of 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 (20°C) is greater than 1.0g / cm 3 , Low content of impurities such as sulfur and nitrogen, basically no metal impurities. [0004] In order to improve economic ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G65/14
Inventor 许杰张忠清姚春雷王立言
Owner CHINA PETROLEUM & CHEM CORP
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