Tetracene extraction and distillation system and technology

A technology of extractive distillation and extractive distillation tower, which is applied in the field of benzene processing technology, can solve the problems of residue treatment that consumes a lot of regeneration heat, the decline of extraction and distillation capacity, and the increase of solvent regeneration, so as to reduce the workload of post operations and economic benefits Remarkable results, remarkable efficiency and energy saving effects

Pending Publication Date: 2018-08-10
MAANSHAN IRON & STEEL CO LTD
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Problems solved by technology

However, during the extraction process of sulfolane, the continuous deterioration of sulfolane is gradually highlighted, which reduces its extraction ability, directly leads to the decline of extraction and distillation ability, and directly leads to the deterioration of product quality.
The main performance is that the color of sulfolane becomes darker, with black polymers, pH value drops,

Method used

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  • Tetracene extraction and distillation system and technology

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[0037] The following describes the specific implementation of the present invention in further detail through the description of the embodiments with reference to the accompanying drawings. The purpose is to help those skilled in the art have a more complete, accurate and in-depth understanding of the concept and technical solutions of the present invention, and Contribute to its implementation.

[0038] Such as figure 1 As shown, a tetrabenzene extractive distillation system includes an extractive distillation tower 1, a recovery tower 2, a benzene tower 3, a toluene tower 4, and a xylene tower 5 connected in sequence. The extractive distillation tower 1 introduces hydrogenated oil and solvent Carry out extractive distillation separation. The hydrogenated oil of the present invention preferably comes from: after crude light benzene undergoes a hydrogenation catalytic reaction, it comes from the bottom of the stabilizing tower. The hydrogenated oil from the hydrogenation unit p...

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Abstract

The invention discloses a tetracene extraction and distillation system and technology. The system comprises an extraction and distillation tower, a recycling tower, a benzene tower, a toluene tower and a xylene tower, which are connected in sequence, wherein the extraction and distillation tower is used for extracting, distilling and separating through introducing hydrogen oil and a solvent. Afterthe technology is applied, the technology is used for continuously producing for many years, and tetracene distillation extraction is carried out on full components by utilizing hydrogenated oil; under the condition that a solvent regeneration device is not needed, the quality of all products can be ensured; especially, the separation efficiency and stability of the extraction and distillation are improved and the purity of 99.99 percent or above can be produced all year round; the consumption amount of a solvent is nearly zero. Meanwhile, the labor amount of post operation is also greatly reduced after each system is stable.

Description

technical field [0001] The invention belongs to the technical field of benzene processing technology, and in particular relates to a tetrabenzene extraction and distillation system and technology. Background technique [0002] In the 21st century, almost all newly-built crude (light) benzene processing technology adopts hydrogenation extractive distillation benzene processing technology. Crude (light) benzene refining is to use crude (light) benzene in coal chemical industry as raw material, remove impurities such as sulfides, nitrides and hydrocarbons in it by chemical methods, and obtain high-purity benzene, toluene, Xylene and other products. At that time, since there was no hydrogenation extractive distillation benzene processing technology with independent intellectual property rights in China, we had to spend a high amount of technology introduction fees to introduce low-temperature gas-phase hydrogenation technology (K.K method) from German Uhde company or introduce ...

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Application Information

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IPC IPC(8): B01D3/40C07C7/08C07C15/04C07C15/06C07C15/08
CPCB01D3/40C07C7/08C07C15/04C07C15/06C07C15/08
Inventor 沈江红朱乐群汪开保夏鹏飞黄贤弟王永林陆国辉邱高平顾明亮方亮青
Owner MAANSHAN IRON & STEEL CO LTD
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