Method of treating phencyclic compound waste water using liquid-liquid extraction

A compound and extraction technology, applied in the direction of extraction water/sewage treatment, etc., can solve the problems of difficult large-scale production, high solubility, secondary pollution, etc., and achieve the effects of cost saving, low operating costs and mild conditions

Inactive Publication Date: 2006-09-13
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above-mentioned solvents have the problems of high solubility in water and secondary pollution, making it difficult to achieve large-scale production

Method used

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  • Method of treating phencyclic compound waste water using liquid-liquid extraction
  • Method of treating phencyclic compound waste water using liquid-liquid extraction

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Experimental program
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Effect test

Embodiment 1

[0020] Embodiment 1: the method for liquid-liquid extraction of the present invention to treat wastewater containing benzene ring compounds comprises the following steps:

[0021] 1.1), at room temperature, use biodiesel as the extraction solvent to extract the wastewater containing benzene ring compounds three times in stages, or use countercurrent continuous extraction; the aniline wastewater is prepared from tap water, the concentration is ~7838.33μg / mL, COD Cr ~21267.6mg / L, pH~7.0; take 100ml of waste water, add 200ml of extraction solvent biodiesel (fatty acid methyl ester), the extraction time is 10min, after extraction, let it stand for 5 minutes, then take out the water phase; then extract with equal volume of biodiesel, As above, a total of 3 stages of extraction were performed. The test results of the effluent are: aniline concentration ~ 1.04μg / mL, COD Cr ~672.5mg / L.

[0022] 1.2), the extraction phase containing benzene ring compounds and biodiesel is reclaimed r...

Embodiment 2

[0024] Embodiment 2: the difference with embodiment 1 is:

[0025] Aniline wastewater is prepared as tap water, COD Cr ~80741mg / L, pH~7.0.

[0026] Take 100ml of waste water, add 100ml of biodiesel (using fatty acid ethyl ester), extract for 10 minutes, take out the water phase after standing for 5 minutes; then extract with equal volume of biodiesel, as above, a total of 3 stages of extraction are carried out. The test result of the effluent is: COD Cr ~735mg / L.

Embodiment 3

[0027] Embodiment 3: the difference with embodiment 1 is:

[0028] Phenol wastewater prepared as tap water, COD Cr ~14604mg / L, pH~7.0.

[0029] Take 100ml of waste water, add 100ml of biodiesel (fatty acid propyl ester), extract for 10 minutes, take out the water phase after standing for 5 minutes; then extract with equal volume of biodiesel, as above, a total of 3 stages of extraction are carried out. The test result of the effluent is: COD Cr ~621mg / L.

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Abstract

A process for treating the sewage of the compound containing the benzene ring by liquid-liquid extraction includes such steps as extracting by biologic diesel oil 1-5 times, vacuum distilling for respectively recovering said compound and biologic diesel oil, conventional biochemical treating, and draining.

Description

technical field [0001] The invention relates to a wastewater treatment method, in particular to a liquid-liquid extraction method for treating wastewater containing benzene ring compounds. Background technique [0002] A large amount of industrial wastewater discharged in the chemical industry and petrochemical, pharmaceutical, food and other industries has many types, complex components, COD Cr (Chemical Oxygen Demand) has the characteristics of high concentration, poor biodegradability, poisonous and harmful, etc. If it is not effectively controlled and treated, it will definitely cause serious pollution and damage to the environment. my country's chemical, pharmaceutical, dyestuff and other enterprises have a large number and a wide distribution area. The discharged sewage contains a large amount of organic matter, and the benzene ring-containing substances belong to the organic matter with a wide pollution area and high toxicity. On the o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/26
Inventor 计建炳于凤文姬登祥徐之超王建黎俞云良
Owner ZHEJIANG UNIV OF TECH
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