Method and device for producing refined anthracene, refined carbazole and phenanthrene product from raw material of monoanthracene oil

Abstract

The invention relates to a technical field of a coal tar deep-processing technology in a metallurgical coking industry, and especially relates to a method and a device used for producing refined anthracene, refined carbazole and phenanthrene products from a raw material of monoanthracene oil. The device comprises a stirring cooler, a slurry circulation tank, a centrifuge, a crystallization tank, a concentration tower, an anthracene tower, and a carbazole tower. The stirring cooler is sequentially technically connected with the slurry circulation tank, the centrifuge, and the crystallization tank. An oil-rich pipe of the crystallization tank is connected with a middle-section inlet in the concentration tower. A phenanthrene-containing solvent oil pipe of the crystallization tank is connected with a middle-section inlet of a solvent distillation tower. A phenanthrene oil product outlet is provided at the bottom of the solvent distillation tower. A refined anthracene product outlet is provided at a side line of the anthracene tower. A refined carbazole product outlet is provided at a side line of the carbazole tower. Compared with prior art, the method and device provided by the invention have the advantages that: (1) no extraction agent is needed in production; and with a three-step distillation process of the concentration tower, the anthracene tower, and the carbazole tower, three products of anthracene, carbazole and phenanthrene oil can be simultaneously obtained; and (2) advantages such as low solvent consumption, high product purity, low pollution, and capability of continuous operation are provided.

Description

technical field [0001] The invention relates to the technical field of coal tar deep processing technology in the metallurgical coking industry, in particular to a method and a device for producing refined anthracene, refined carbazole and phenanthrene products using anthracene oil as a raw material. Background technique [0002] At present, the main products of anthracene oil finishing are refined anthracene and carbazole, and the processing techniques mainly include solvent extraction, solvent extraction-distillation, azeotropic distillation, and crystallization-distillation. [0003] Among them, the solvent extraction method is based on the difference in solubility of anthracene, phenanthrene and carbazole in different solvents, heating and dissolving the crude anthracene, cooling crystallization and centrifugal filtration, enriching the easily soluble components in the filtrate, and enriching the insoluble components in the filtrate. In crystallization, the purity of the...

AI Technical Summary

Problems solved by technology

The production of refined anthracene by this method is limited by the production capacity of the crystallizer. In order to improve the product purity, many steps of crystallization operations are required, and there are disadvantages such as increasing the crystallization time.

In addition, considering the cost of introduction of the process is too high economically

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