Hydrocracking method of deep cut anthracene oil

Abstract

The invention provides a hydrocracking method of deep cut anthracene oil. The method comprises the following steps of: refining deep cut anthracene oil by means of hydrogenation, then subjecting the deep cut anthracene oil into gas-liquid separation by means of a hot high-pressure separator and a hot low-pressure separator, partially recycling the hot low boiling point oil obtained into the hydrofining region to mix with the deep cut anthracene oil, infusing the residual hot low boiling point oil into the hydrocracking region and then orderly adding a hydrofining catalyst, a hydrodecarbonation catalyst and a hydrocracking catalyst, wherein the hydrocracking product and the gas separated from the hot high-pressure separator are entered into a cold high-pressure separator, the liquid separated during the hydrocracking process and the gas separated from the hot low-pressure separator are entered into a cold low-pressure separator, and the liquid separated during the hydrocracking process is infused into the product distillation column after stripping so as to obtain gasoline and diesel fractions. The hydrocracking method of deep cut anthracene oil provided by the invention has the advantages that the deep cut anthracene oil can be processed, the range of raw material is enlarged, the deep cut anthracene oil can be inversed in the maximum extent and the yield of light fuel oil is improved; simultaneously, the activity of hydrocracking catalyst is effectively protected and the device can be run in a long period.

Description

Technical field [0001] The invention relates to a deep drawn anthracene oil hydrocracking method, in particular to a deep drawn anthracene oil hydrocracking method to produce clean fuel 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 is a bituminous component. In recent years, coal tar hydrogenation has attracted much attention in the coal chemical industry. The dry point of the hydrogenated raw materials is generally less than 500-550°C. As a processing raw material that needs to be increased in added value, the asphalt component is currently only used as an electrode and carbon raw material. The economy is slightly worse (see "Development and Utilization of Coal Tar Pitch and Its Prospects", "Entrepreneur's World", Issue 8, 2007). At present,...

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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