Anthracene oil hydrocracking method

Abstract

The invention belongs to the technical field of chemical engineering industries, and particularly relates to an anthracene oil hydrocracking method which includes the steps: respectively enabling raw anthracene oil to enter a hydrofining system for hydrofining from two pipelines A and B, separating hydrofining products by a thermal high-pressure separator, enabling liquid products to enter a thermal low-pressure separator and circulating thermal low separated oil to a hydrofining reactor; enabling remaining thermal low separated oil to enter a hydrocracking reactor to obtain hydrocracking products, enabling the hydrocracking products and gas separated from the thermal high-pressure separator to enter a cold high-pressure separator, enabling liquid separated by the cold high-pressure separator and gas separated by the thermal low-pressure separator to enter a cold low-pressure separator for further gas-liquid separation, and circulating cold low separated oil separated by the cold low-pressure separator to the hydrofining reactor; fractionating remaining cold low separated oil to obtain various products and tail oil. The method is low in refining section temperature rise and steady to operate, a device is safe and steady in running, and the running period of the device is prolonged.

Description

technical field [0001] The invention belongs to the technical field of coal chemical industry, and in particular relates to a method for hydrocracking anthracene oil. Background technique [0002] Anthracene oil is an important part of coal tar components. In recent years, coal tar hydrogenation has attracted much attention in the coal chemical industry. It has been reported that hydrogenation of various fractions of coal tar as raw materials to prepare clean fuel oil has been reported. [0003] Anthracene oil is one of the fractions obtained by distillation of high-temperature coal tar. Its initial boiling point is 220-260°C, and its final boiling point is 500-550°C. It has a relatively heavy distillation range and belongs to the heavy fraction range. Anthracene oil is mainly a mixture of compounds such as anthracene, phenanthrene, carbazole, and acenaphthene, mostly aromatic hydrocarbons with three rings and four rings or more, and the density (20°C) is greater than 1.0g / m...

AI Technical Summary

Problems solved by technology

However, the above two methods use anthracene oil as the raw material, a large amount of heat will be released during the hydrofining process, and there are problems such as large temperature rise of the device and unstable operation, and it is easy to cause coking of the catalyst, which affects the service life of the ca

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