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Treatment method of high-concentration phenolic wastewater in coal chemical industry

A treatment method and high-concentration technology, which is applied in special compound water treatment, natural water body treatment, chemical instruments and methods, etc., can solve problems such as poor effect, high energy consumption, and large solvent loss, and achieve less solvent volatilization loss, Strong process flexibility, energy saving effect in the solvent recovery stage

Inactive Publication Date: 2016-10-26
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In order to solve the problem in the prior art when treating phenol-containing wastewater with a high content of phenols, using existing extractants such as diisopropyl ether and methyl isobutyl ketone to extract and remove phenols has poor effect and solvent loss Large and high energy consumption defects, the present invention provides a treatment method for high-concentration phenol-containing wastewater in coal chemical industry

Method used

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Effect test

Embodiment 1

[0036] This embodiment is used to illustrate the treatment method of the high-concentration phenol-containing wastewater provided by the present invention.

[0037]The temperature of high-concentration phenol-containing wastewater (total phenol content is 12000 mg / L, wherein the content of unit phenols is 8000 mg / L and the content of polyphenols is 4000 mg / L) is controlled at 30 °C, and its pH value is adjusted to 8. The dephenol extractant (100% by volume of methyl propyl ketone) was mixed with the high-concentration phenol-containing wastewater after adjusting the pH value according to the volume ratio of 1:3 for 15 minutes, and then left to stand for 40 minutes to obtain the extract phase and raffinate Mutually.

[0038] After testing, the contents of unit phenols and polyphenols in the obtained raffinate phase were 132 mg / L and 553 mg / L, respectively, and the contents of unit phenols and polyphenols in the obtained extract phase were 23539 mg / L and 10517 mg / L, respectively...

Embodiment 2

[0040] This embodiment is used to illustrate the treatment method of the high-concentration phenol-containing wastewater provided by the present invention.

[0041] The temperature of high-concentration phenol-containing wastewater (total phenol content is 12000mg / L, wherein the content of unit phenols is 8000mg / L and the content of polyphenols is 4000mg / L) is controlled at 70°C, and its pH value is adjusted to 8. The dephenol extractant (100% by volume of methyl propyl ketone) was mixed with the high-concentration phenol-containing wastewater after adjusting the pH value at a volume ratio of 1:3 for 20 minutes, and then left to stand for 60 minutes to obtain the extract phase and raffinate Mutually.

[0042] After testing, the contents of unit phenols and polyphenols in the obtained raffinate phase were 192 mg / L and 839 mg / L respectively, and the contents of unit phenols and polyphenols in the obtained extract phase were 23021 mg / L and 9337 mg / L, respectively. It can be calc...

Embodiment 3

[0044] This embodiment is used to illustrate the treatment method of the high-concentration phenol-containing wastewater provided by the present invention.

[0045] The temperature of high-concentration phenol-containing wastewater (total phenol content is 12000 mg / L, among which, unit phenol content is 8000 mg / L and polyphenol content is 4000 mg / L) is controlled at 40 °C, and its pH value is adjusted to 8. The dephenol extractant (100% by volume of methyl propyl ketone) was mixed with the high-concentration phenol-containing wastewater after adjusting the pH value according to the volume ratio of 1:1 for 20 minutes, and then left to stand for 60 minutes to obtain the extract phase and raffinate Mutually.

[0046] After testing, the contents of unit phenols and polyphenols in the obtained raffinate phase were 46 mg / L and 211 mg / L, respectively, and the contents of unit phenols and polyphenols in the obtained extract phase were 7935 mg / L and 3786 mg / L, respectively. It can be ...

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Abstract

The invention discloses a treatment method of high-concentration phenolic wastewater in coal chemical industry. The treatment method comprises the specific operating steps that a dephenolizing extraction agent methyl propyl ketone for the high-concentration phenolic wastewater in the coal chemical industry is extracted at the temperature of 30-80 DEG C to obtain an extraction phase and a raffinate phase, wherein the total phenol content in the high-concentration phenolic wastewater in the coal chemical industry is not lower than 2000 mg / L. Compared with the prior art, more energy is saved at a solvent recovery stage in the treatment method, and the energy consumption of a water tower is greatly reduced. In addition, the methyl propyl ketone has an excellent extraction effect so that the treatment method can very effectively reduce the phenolic substance content in the high-concentration phenolic wastewater.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and in particular relates to a treatment method for high-concentration phenol-containing wastewater of coal chemical industry. Background technique [0002] Methyl propyl ketone, also known as 2-pentanone, is a colorless liquid with the smell of acetone. The boiling point is 102°C, the heat of evaporation is 33.67kJ / mol, the relative density (20°C / 4°C) is 0.8089, and the property is stable. Its main use is as an industrial solvent, and it is also an excellent lubricating oil dewaxing agent, and can also be used as a solvent for nitro spray paint, synthetic resin paint, and organic synthesis raw materials. It has not been found to be used for extraction research or industrial application of high-concentration phenol-containing wastewater. [0003] my country is rich in coal resources and has large reserves. Coal chemical industry is an effective way to realize the efficient utilization of coal res...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/26C02F9/10C02F103/34C02F101/34
CPCC02F1/26C02F9/00C02F1/04C02F2101/345C02F2103/34C02F2305/00
Inventor 陈赟吕冉
Owner SOUTH CHINA UNIV OF TECH
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