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Method for hydrotreating ethylene tar

A technology for ethylene tar and hydrocracking, which is applied in the fields of hydrotreating process, hydrocarbon oil treatment, petroleum industry, etc., and can solve the problems that the ethylene tar fraction cannot be processed and has not been effectively treated.

Active Publication Date: 2011-11-09
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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  • Method for hydrotreating ethylene tar
  • Method for hydrotreating ethylene tar
  • Method for hydrotreating ethylene tar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～3

[0053] 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: 12:19:19:25:25. 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

[0061] use figure 1 In the flow process shown, the ethylene tar heavy fraction (see Table 4 for properties) passes through the hydrogenation protection catalyst, the hydrogenation deresidue catalyst and the hydrogenation conversion catalyst successively, and its volume ratio is 10:40:50, wherein the hydrogenation protection catalyst used They are FZC-100 and FZC-102B, and their volume ratio is 1:2. The hydrogenation conversion catalyst, such as the catalyst obtained in Example 1 of CN02109422.5, is denoted as ZH1, and its properties are shown in Table 5.

[0062] Table 5 Composition and properties of hydroconversion catalysts

[0063]

[0064] The loading volume ratio of the used hydrodecarbonization catalyst HDC-1 and HDC-2 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 embodiment, the weight ratio of the heat low fraction oil recycled back to the hydrogena...

Embodiment 5

[0066] Compared with Example 4, the heat high fraction oil circulation is adopted, and the weight ratio of the heat high fraction oil recycled to the hydrogenation reaction zone to the heavy fraction of ethylene tar is 2.0, and the used hydrogenation carbon removal catalyst The filling volume ratio of HDC-1 and HDC-2 was changed to 5:5, and the rest were the same as in Example 4.

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Abstract

The invention discloses a method for hydrotreating ethylene tar, which comprises the following steps of: performing fractional distillation on the ethylene tar by selecting a proper cutting point to obtain light and heavy fractions; making the light fraction contact a hydrogenation protective agent, a hydrogenation refining catalyst, a hydrogenation carbon residue catalyst and a hydrocracking catalyst in turn, reacting to obtain products, and separating the products to obtain gasoline and diesel fractions; and making the heavy fraction contact a hydrogenation protecting catalyst, a hydrogenation carbon residue removing catalyst and a hydro-conversion catalyst in turn to obtain hydro-conversion generated oil, wherein partial hydro-conversion generated oil is circulated to enter a hydrogenation reaction area, and the rest hydro-conversion generated oil is separated to form gasoline and diesel fractions. In the method, according to composition characteristics of the light and heavy fractions of the ethylene tar, different hydrotreating schemes are selected, so that the ethylene tar is converted into fuel oil to the greatest extent, the problem of high temperature rise of a hydrogenation reactor bed can be effectively solved, the running period of the device is prolonged, 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 hydrogenation treatment 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...

Claims

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Application Information

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IPC IPC(8): C10G67/00
Inventor 许杰关明华
Owner CHINA PETROLEUM & CHEM CORP
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