用正甲基吡咯烷酮-庚烷体系萃取纯化重质延迟焦化瓦斯油

Bulletin of the Saint Petersburg State Institute of Technology (Technical University) Pub Date : 2023-01-01 DOI:10.36807/1998-9849-2023-64-90-13-17

A. V. Kameshkov, A. A. Gaile, Maria Ahmad, Vladislav S. Karnaukh, Danil S. Akamov

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引用次数: 0

摘要

本文介绍了n -甲基吡咯烷酮与2%水质量比为0.5∶1、0.75∶1、1:1、庚烷与原料质量比为0.3∶1、温度为40℃条件下重质延迟焦化煤气的萃取纯化结果。结果表明，在n -甲基吡咯烷酮萃取体系中引入庚烷后，多芳烃的选择性释放增加，从而提高了萃取液的收率。然而，由于延迟焦化的汽油中不仅存在芳香性质的硫化物，而且存在饱和的噻环和二烷基硫化物与庚烷形成接近理想的体系，从而降低了汽油的脱硫效率。

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EXTRACTION PURIFICATION OF HEAVY DELAYED COKING GAS OIL USING THE N-METHYLPYRROLIDONE – HEPTANE SYSTEM

The article presents the results of the extraction purification of heavy delayed coking gas oil with mass ratios of N-methylpyrrolidone with 2 % mas water to raw materials as 0.5 : 1, 0.75 : 1, 1 : 1, and in the presence of heptane at mass ratio to raw materials as 0.3 : 1 and temperature of 40 оC. It was found that the introduction of heptane into the extraction system with N-methylpyrrolidone leads to an increase in the yield of raffinate due to an increase in the selectivity of the release of polyaromatic hydrocarbons. However, due to the presence in the gas oil of delayed coking of sulfur compounds of not only aromatic nature, but also saturated thiacyclanes and dialkylsulfides forming systems close to ideal with heptane, the efficiency of gas oil desulfurization decreases.

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Bulletin of the Saint Petersburg State Institute of Technology (Technical University)

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