Method for treating high concentration phenolic wastewater

A treatment method, a technology for phenol wastewater, applied in the direction of extraction water/sewage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems of high energy consumption and poor effect, and achieve low energy consumption and effective Content, the effect of excellent extraction effect

Active Publication Date: 2014-11-05
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of poor extraction and dephenolation effect and energy consumption when using existing extractants such as diisopropyl ether and methyl isobutyl ketone...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] This embodiment is used to illustrate the treatment method of the high-concentration phenol-containing wastewater provided by the present invention.

[0034] 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. Mix the phenol-removing extractant (100% by volume of methyl tert-butyl ketone) with the high-concentration phenol-containing wastewater after adjusting the pH value at a volume ratio of 1:3 for 15 minutes, and then let stand for 60 minutes to obtain the extract phase and the raffinate phase .

[0035] After testing, the contents of unit phenols and polyphenols in the obtained raffinate phase were 233 mg / L and 804 mg / L respectively, and the contents of unit phenols and polyphenols in the obtained extract phase were 23354 mg / L and 9688 mg / L respectiv...

Embodiment 2

[0037] This embodiment is used to illustrate the treatment method of the high-concentration phenol-containing wastewater provided by the present invention.

[0038] 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. Mix the phenol-removing extractant (100% by volume of methyl tert-butyl ketone) with the high-concentration phenol-containing wastewater after adjusting the pH value according to the volume ratio of 1:3 for 20 minutes, and then let it stand for 60 minutes to obtain the extract phase and the raffinate phase .

[0039] After testing, the contents of unit phenols and polyphenols in the obtained raffinate phase were 369 mg / L and 1216 mg / L, respectively, and the contents of unit phenols and polyphenols in the obtained extract phase were 22893 mg / L and 8352 mg ...

Embodiment 3

[0041] This embodiment is used to illustrate the treatment method of the high-concentration phenol-containing wastewater provided by the present invention.

[0042] 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 40°C, and its pH value is adjusted to 8. Mix the phenol-removing extractant (100% by volume of methyl tert-butyl ketone) with the high-concentration phenol-containing wastewater after adjusting the pH value at a volume ratio of 1:1 for 20 minutes, and then let stand for 60 minutes to obtain the extract phase and the raffinate phase .

[0043] After testing, the contents of unit phenols and polyphenols in the obtained raffinate phase were 82 mg / L and 361 mg / L, respectively, and the contents of unit phenols and polyphenols in the obtained extract phase were 7918 mg / L and 3639 mg / L, respectively....

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Abstract

The invention relates to a method for treating high concentration phenolic wastewater. The treating method comprises extracting the high concentration phenolic wastewater with a dephenolization extractant to obtain an extraction phase and a raffinate phase, wherein the dephenolization extractant contains pinacolone, and the high concentration phenolic wastewater contains not less than 2000mg / L of total phenolic contents of phenol. Compared with the prior art, the treating method in the invention is more energy-saving in the solvent recovery stage, and energy consumption of water tower is reduced greatly; and pinacolone has excellent extraction effect, so that the treating method can effectively reduce the content of phenols 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. Background technique [0002] Methyl tert-butyl ketone, also known as 3,3-dimethyl-2-butanone or pinacolone, is a colorless liquid, mainly used as a solvent, and can be used to produce triazole pesticides, such as triadimefon, paclobutrazol, Uniconazole, mecitrione, benconazole, bisbenzotriazolone, octazolone, etc., and plant growth regulators paclobutrazol, uniconazole, imbudazole, cloconazole, etc., are also used in herbicides and pharmaceutical products. Slightly soluble in water, boiling point is 106°C, density relative to water is 0.80g·cm -3 , stable in nature. It has not been found to be used for extraction research or industrial application of high-concentration phenol-containing wastewater. [0003] High-concentration phenolic ammonia-containing wastewater from coal chemical industry u...

Claims

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Application Information

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IPC IPC(8): C02F1/26C02F101/34
Inventor 陈赟王卓师玉虎
Owner SOUTH CHINA UNIV OF TECH
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