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Coupling device and coupling process for extracting phenol from coal tar and treating phenol-containing water

A coupling device and coal tar technology are applied in the coupling process, coal tar extraction phenol and coupling device field of phenol-containing water treatment, which can solve the problems of poor quality of crude phenol products, high equipment cost and high processing cost, and reduce the phenol content. And the effect of processing cost, reducing energy consumption and improving quality

Active Publication Date: 2021-12-21
胜帮科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] When the above method is used to extract phenol, multi-stage extraction is required, the equipment cost is high, and a large amount of phenol-containing sewage will be produced during the distillation process, which is difficult to treat. The cost of follow-up treatment is high, and the quality of the crude phenol product obtained at the same time is poor
[0008] To sum up, how to provide a kind of coal tar in order to solve the environmental problems caused by the phenol extraction of coal tar and the phenolic water produced in the distillation process of tar The coupling process of phenol extraction and phenol-containing water treatment to reduce the phenol content in the sewage during the distillation of coal tar and improve the quality of crude phenol products has become an urgent problem to be solved

Method used

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  • Coupling device and coupling process for extracting phenol from coal tar and treating phenol-containing water
  • Coupling device and coupling process for extracting phenol from coal tar and treating phenol-containing water
  • Coupling device and coupling process for extracting phenol from coal tar and treating phenol-containing water

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Embodiment 1

[0100] This embodiment provides a coupling device and coupling process for extracting phenol from coal tar and treating phenol-containing water, based on the coupling device provided in the specific implementation:

[0101] Among them, the packed rectification tower is provided with 4 packing sections. The schematic diagram of the connection structure of the coupling device provided in this embodiment is as follows: figure 1 shown.

[0102] The coupling process that adopts above-mentioned coupling device to carry out comprises the following steps, and its technological process is as follows: figure 2 as shown,

[0103] (1) Carry out extraction and rectification of coal tar to obtain phenolic oil (taking 3 , crude phenol content is 36.7wt%); When carrying out described extractive rectification, used extractant obtains dephenolized light oil after the third rectification in step (3);

[0104] (2) Carry out primary extraction to the phenol-containing oil obtained in step (1) ...

Embodiment 2

[0114] This embodiment provides a coupling device and coupling process for extracting phenol from coal tar and treating phenol-containing water, based on the coupling device provided in the specific implementation:

[0115] Among them, the packed rectification tower is provided with 4 packing sections.

[0116] The coupling process that adopts above-mentioned coupling device to carry out comprises the following steps:

[0117] (1) extracting and rectifying coal tar to obtain phenol-containing oil; when carrying out said extracting and rectifying, the extractant used is obtained after the third rectifying in step (3) to obtain dephenolized light oil;

[0118] (2) Carry out primary extraction to the phenolic oil that step (1) obtains by adding methanol aqueous solution (the mass ratio of described methanol aqueous solution and described phenolic oil is 1:1), the primary extraction phase that obtains adopts ring Hexane carries out secondary extraction (the mass ratio of describe...

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Abstract

The invention provides a coupling device and a coupling process for extracting phenol from coal tar and treating phenol-containing water. The coupling device simultaneously solves the environmental protection problem in the process of extracting phenol from coal tar and distilling tar through the design combination of a plurality of fractionation sections and a two-stage extraction section and the assistance of a water washing section and a low-temperature separation section. According to the coupling technology, through the technology combining extractive distillation and liquid-liquid extraction, the quality of a crude phenol product is improved, the content of impurity neutral oil is reduced, through the operation of pre-separating a crude phenol solution at a low temperature, the energy consumption of a crude phenol distillation and dehydration section is greatly reduced, and the coupling technology has a good industrial application prospect.

Description

technical field [0001] The invention belongs to the technical field of coal tar production, and relates to a coupling device and a coupling process for extracting phenol from coal tar and treating phenol-containing water. Background technique [0002] As an important raw material in the field of coal chemical industry, medium and low temperature coal tar has the characteristics of high phenol content and high water content. Therefore, due to the existence of phenolic compounds in the process of hydrogenation of coal tar to produce fuel oil, not only the hydrogen consumption is high, but also the yield of the product is reduced due to the generation of water by hydrodeoxygenation; but due to the high added value of phenolic compounds , if the phenols in coal tar can be separated, the economics of its hydrogenation process will certainly be improved. [0003] At present, there are many coal tar phenol extraction processes, mainly including acid-base method and selective solve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10C1/00C10C1/14C10C1/18
CPCC10C1/00C10C1/14C10C1/18
Inventor 王庆元严朕潘越侯向楠黄云
Owner 胜帮科技股份有限公司
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