Method for producing light fuel oil from ethylene tar

A technology of ethylene tar and coker gasoline, which is applied in the combined process of delayed coking and hydrogenation, and can solve the problem of poor quality of liquid products - coker gasoline, diesel oil and wax oil, low yield of liquid and light fuel oil products , The ethylene tar fraction has not been effectively dealt with and other problems, to achieve the effect of expanding the source of raw materials, reducing the concentration of naphthalene series, and alleviating the problem of concentrated heat release

Active Publication Date: 2013-05-15
CHINA PETROLEUM & CHEM CORP +1
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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

[0047] 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. See Table 5 for coking gasoline pre-hydrofining process conditions and coker gasoline hydrofining process conditions. In the embodiment, cokered diesel oil and coker gas oil are mixed with ethylene tar light fraction, and subjected to hydrotreating to obtain light fuel oil. The hydrotreating process conditions are shown in Table 6. In the example, the hydrogenation reactor adopts two reactors connected in series, one reactor is loaded with hydrogenation protection age...

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Abstract

The invention discloses a method for producing light fuel oil from ethylene tar. The method consists of: fractionating ethylene tar into light fraction and heavy fraction, mixing the heavy fraction with a conventional coking raw material, conducting delayed coking to obtain coker gasoline, coker diesel oil, and coker gas oil, performing hydrofining on the coker gasoline, mixing the coker diesel oil with the ethylene tar light fraction, subjecting the mixture to hydrotreating, and leaving the product and the coker gasoline hydrofining product together to undergo separation, thus obtaining clean gasoline and diesel oil products. Directed at the characteristics of high content of aromatic hydrocarbon, colloid, carbon residue and asphaltene in ethylene tar, the method provided in the invention fractionates the ethylene tar into light fraction and heavy fraction, and adopts different processing processes, thus not only enhancing the utilization rate and the additional value of ethylene tar, increasing the yields of gasoline and diesel oil, improving the product quality of light fuel oil, and also enabling the equipment to run smoothly for a long period.

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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