Hydrogenation method of deep drawing anthracene oil

Abstract

The invention discloses a hydrogenation method of deep drawing anthracene oil, comprising the following steps of: hydrorefining the deep drawing anthracene oil, separating gas and liquid through a hot high-pressure separator, mixing the obtained hot high-fraction oil part with the deep drawing anthracene oil when the obtained hot high-fractionoil part is circulated to a hydrorefeining reaction zone, introducing the remaining hot high-fraction oil part into a hydrocracking reaction zone by utilizing differential pressure for sequentially passing by a hydrorefining catalyst, a hydrogenation decarbonation catalyst and a hydrocrakcing catalyst to obtain a hydrocracking product, introducing the obtained hydrocracking product and the gas separated from the hot high-pressure separator into a cold high-pressure separator, introducing the separated liquid into a cold low-pressure separator, introducing the liquid separated from the cold low-pressure separator into a product fractionating tower after the liquid is subjected to steam stripping to obtain gasoline and diesel distillate. The method not only can be used for processing the deep drawing anthracene oil and broadening the rang of raw materials, but also benefits the transformation of the deep drawing oil to the greatest extent, thereby improving the yield of light fuel oil and enhancing the additional value of the anthracene oil, and in addition, the method is favorable for lowering the temperature rise of a device, reducing equipment investment and energy consumption, simplifying the operation of the device and prolonging the running period of the device.

Description

technical field [0001] The invention relates to a method for hydrogenating deep carbinthrene oil, in particular to a method for producing clean fuel oil by hydrocracking carbathrene oil. Background technique [0002] Coal tar is a by-product of coking technology, and anthracene oil is one of its distillation products. Generally, the fraction at 300-360°C is called I anthracene oil, the fraction at 360-500°C is called II anthracene oil, and the fraction above 500°C belongs to asphalt components. In recent years, coal tar hydrogenation has attracted much attention in the coal chemical industry. The dry point of hydrogenation raw materials is generally less than 500-550°C. As a processing raw material that needs to increase added value, asphalt components are currently only used as electrodes and carbon raw materials. The economy is slightly worse (see "Development and Utilization of Coal Tar Pitch and Its Prospect", "Entrepreneur's World" No. 8, 2007). At present, the raw mat...

AI Technical Summary

Problems solved by technology

[0005] CN101024780A uses conventional anthracene oil as raw material to produce high-quality diesel oil. It adopts a series process of hydrofinishing-hydrocracking. The ammonia and water generated in the process of hydrofinishing have adverse effects on the activity and stability of subsequent hydrogenation catalysts, affecting the device operating cycle, can not process deep dipanthracene oil

CN101033409A refines and produces oil with a nitrogen content of <400 μg / g, and CN1676583A tail oil directly enters the hydrocracking reactor. These two methods have the same problem: the nitrogen-containing compounds that are difficult to remove are concentrated in the heavy fraction as the hydrocracking feed In the conventional hydrotreating catalyst and hydrogenation conditions, it is difficult to make the nitrogen content in the heavy fraction meet the feed requirements of hydrocracking

These two methods can not process deep dipanthracene oil

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