Method for extraction of pyridine compounds from coal tar

A technology of phenolic compounds and pyridines, which is applied in the field of coal chemical industry, can solve problems such as affecting oil quality, increasing hydrogen consumption, poisoning of hydrogenation catalysts, etc., so as to make up for the gap of rare resources and improve the utilization level.
CN104893750AActive Publication Date: 2015-09-09SHAANXI COAL & CHEM IND GRP SHENMU TIANYUAN CHEM IND +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SHAANXI COAL & CHEM IND GRP SHENMU TIANYUAN CHEM IND
Publication Date
2015-09-09

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Abstract

The present invention provides a method for extraction of pyridine compounds from coal tar, the method includes the units of fractional distillation of coal tar into narrow fractions, extraction of phenolic compounds from the narrow fractions, extraction of pyridine compounds from the phenolic compounds by use of solvent I, extraction of pyridine compounds from dephenolized oil by use of pyridine compound salt-base 1, neutralization of pyridine compound salt-base 2 s by use of solvent II, and refining of crude pyridine compounds. By the method, the pyridine compounds in the phenolic compounds and the pyridine compounds in the dephenolized oil are extracted, the goal of full recovery of the pyridine compounds can be achieved, and the entire process is free of pollutants.
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Description

technical field

[0001] The invention relates to a method for extracting pyridine compounds from coal tar, belonging to the technical field of coal chemical industry. Background technique

[0002] my country is rich in coal tar resources. Coal tar contains a certain amount of phenolic compounds and pyridine compounds. Although the content of these compounds is not very high, they are rare, rare and valuable resources. But so far, the research basically only considers the separation of phenolic compounds, but does not consider the separation of pyridine compounds, and there is no relevant teaching on how to extract pyridine compounds in coal tar.

[0003] However, the existence of pyridine compounds in coal tar has many hazards: hydrogenation of pyridine compounds will generate ammonia, which increases hydrogen consumption on the one hand, and on the other hand, the generated ammonia is likely to poison the hydrogenation catalyst; Pyridine compounds will affect the quality o...

Claims

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