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Method for producing light fuel oil from ethylene tar

A light fuel oil and ethylene tar technology, applied in the field of combined process of delayed coking and hydrogenation, can solve the problem of poor quality of liquid products - coker gasoline, diesel oil and wax oil, liquid yield and light fuel oil product yield Low efficiency, ethylene tar fraction has not been effectively treated, etc., to achieve the effects of long-term operation, ease of feeding difficulties, and reduction of olefin content

Active Publication Date: 2013-05-15
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method only utilizes a small proportion of light fractions 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
[0006] There are reports on delayed coking of vacuum residue blended with ethylene tar: CN101608132A, "Response Surface Analysis Method Optimizing the Delayed Coking Research of Blending Ethylene Cracking Tar" (see "Petroleum Refining and Chemical Industry" 2009 No. 8 P5- P8. "Research on Blending Daqing Pyrolysis Tar in Delayed Coking Unit" (see "Petroleum Refining and Chemical Industry" 2007, No. 12 P20-P22), "Influence of Blending Ethylene Cracking Heavy Oil on Delayed Coking" (see "Petrochemical Technology and Application" 2010 No. 1 P44-P49) and "Vacuum Residue Blending Ethylene Heavy Tar Cocoking Test" (see "Journal of Maoming University" 2008 No. 1 P7-P9, etc. These studies are all ethylene The whole distillate of tar is blended with vacuum residue as raw material for delayed coking, which will make the yield of liquid and light fuel oil products lower, and the quality of the resulting liquid products—coker gasoline, diesel oil and wax oil remains the same. Poor, needs further processing

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  • Method for producing light fuel oil from ethylene tar

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Embodiment 1~3

[0044] use figure 1 process. Ethylene tar was distilled into light fraction and heavy fraction, with 420°C and 480°C as the cut-off points, respectively, to obtain light fraction and heavy fraction after distillation. The properties of the vacuum residue are listed in Table 2. Table 3. The obtained ethylene tar heavy fraction was mixed with the vacuum residue, the mixed raw material and its delayed coking process conditions, and the properties of the obtained gasoline and diesel fractions are shown in Table 4. Coker gasoline, coker diesel oil and ethylene tar light fraction are mixed together as the raw material for the hydrofinishing reactor. The reactor is filled with hydrogenation protecting agent FZC-103 and hydrofinishing catalyst 3936 from top to bottom. The volume ratio of the two catalysts is 1:4, the hydrofining reaction process conditions and the properties of the resulting fraction heavier than gasoline are shown in Table 5. In this example, a distillate heavier t...

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Abstract

The invention discloses a method for producing light fuel oil from ethylene tar. The method is as below: fractionating ethylene tar into a light fraction and a heavy fraction; mixing the heavy fraction with a conventional coking raw material, and subjecting the mixture to delayed coking to obtain coker gasoline, coker diesel and coker gas oil; mixing the coker gasoline and the coker diesel with the light fraction of the ethylene tar, and subjecting the mixture to a hydrofining reaction; distilling the product to obtain a gasoline fraction I and a fraction heavier than the gasoline; subjecting the fraction heavier than the gasoline to a hydrogenation treatment to obtain light fuel oil, and distilling to obtain a gasoline fraction II and a diesel product; and mixing the gasoline fraction I and the gasoline fraction II to obtain a final gasoline product. The method provided by the invention utilizes the characteristics of high contents of ethylene tar aromatic hydrocarbons, colloid, carbon residue and glial and asphaltene of ethylene tar to fractionate the ethylene tar into the light fraction and the heavy fraction; different processing methods are employed to improve the added value of ethylene tar, increase yield of gasoline and diesel, improve product quality of light fuel oil and realize long-period stable operation of devices.

Description

technical field [0001] The invention relates to a method for producing light fuel oil from ethylene tar, in particular to a combined process of delayed coking and hydrogenation for blending 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 ethylene cracking raw materials and products in the steam cracking process. 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 or more fused-ring aromatics, with an aromatic content of more than 90% and a density (20°C) greater than 1.0 g / cm 3 , Low content of impurities such as sulfur ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G69/00
Inventor 许杰张忠清姚春雷张学萍郑庆华初人庆张晓晖
Owner CHINA PETROLEUM & CHEM CORP
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