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Hydrophobic eutectic solvent and application thereof in extraction of industrial phenolic wastewater

A technology of deep eutectic solvent and industrial wastewater, which is applied in the direction of extraction of water/sewage treatment, water/sludge/sewage treatment, water pollutants, etc., can solve the problems of long extraction and separation time, and achieve short extraction time and short time , the effect of mild reaction conditions

Pending Publication Date: 2022-04-12
SHENYANG INST OF AUTOMATION GUANGZHOU CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This hydrophobic deep eutectic solvent is solid at room temperature and needs to be extracted under heating conditions, and the extraction and separation time is relatively long

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Hydrophobic deep eutectic solvent preparation method: Take 0.1mol menthol and 0.1mol lauric acid and mix them in a water bath at 50°C for 5 minutes to obtain a uniform transparent liquid, that is, hydrophobic deep eutectic solvent HDES1.

[0033] Put HDES1 and 53523mg / L phenolic resin production waste water into the container according to the mass ratio of 1:1, stir at room temperature for 1 hour, let stand to separate the liquid for 1 hour, test the phenol removal rate by UV spectrophotometry on the lower aqueous phase, and obtain the phenol removal rate was 92.33%.

[0034] Add HDES1 and 3624.66mg / L phenolic resin production wastewater into the container according to the mass ratio of 1:1, stir at room temperature for 1 hour, let stand to separate the liquid for 1 hour, test the phenol removal rate by UV spectrophotometry on the lower aqueous phase, and obtain phenol removal The rate is 92.80%.

[0035] Put HDES1 and 53523 mg / L phenolic resin production wastewater in...

Embodiment 2

[0039]Hydrophobic deep eutectic solvent preparation method: Mix 0.1 mol menthol and 0.1 mol capric acid and stir in a water bath at 50°C for 5 minutes to obtain a uniform transparent liquid, namely hydrophobic deep eutectic solvent HDES2.

[0040] Put HDES2 and 53523mg / L phenolic resin production waste water into the container according to the mass ratio of 1:1, stir for 1 hour at 50°C water bath temperature, let stand to separate the liquid for 1 hour, and test the phenol removal rate by UV spectrophotometry on the lower aqueous phase, and get The removal rate of phenol was 94.03%.

Embodiment 3

[0042] Hydrophobic deep eutectic solvent preparation method: Mix 0.2 mol menthol and 0.1 mol lauric acid and stir in a water bath at 50°C for 5 minutes to obtain a uniform transparent liquid, namely the hydrophobic deep eutectic solvent HDES3.

[0043] Add HDES3 and 53523 mg / L phenolic resin production wastewater into the container according to the mass ratio of 1:1, stir at room temperature for 1 hour, let stand to separate the liquid for 1 hour, and test the phenol removal rate by UV spectrophotometry on the lower aqueous phase to obtain the phenol removal rate was 94.48%.

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PUM

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Abstract

The invention belongs to the technical field of wastewater treatment, and discloses a hydrophobic eutectic solvent and application thereof in extraction of industrial phenolic wastewater. The hydrophobic deep-eutectic solvent comprises a hydrogen bond acceptor and a hydrogen bond donor, the hydrogen bond acceptor is at least one of menthol, lauric acid, thymol and betaine, and the hydrogen bond donor is at least one of nonanoic acid, capric acid, lauric acid and thymol. The molar ratio of the hydrogen bond acceptor to the hydrogen bond donor is (1: 3)-(2: 1). The preparation method comprises the following steps: mixing the hydrogen bond acceptor and the hydrogen bond donor according to the ratio, and stirring at the temperature of 30-50 DEG C for 5-10 minutes to form transparent uniform liquid, namely the hydrophobic deep-eutectic solvent. The prepared hydrophobic deep-eutectic solvent is in a liquid state at normal temperature, is small in viscosity, is not liable to volatilize, is good in fluidity, can be applied to centrifugal extraction equipment or an extraction tower to treat phenol-containing wastewater, and reduces extraction energy consumption.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, in particular to a hydrophobic deep eutectic solvent and its application in extracting industrial phenolic wastewater. Background technique [0002] Phenol-containing wastewater mainly comes from industries such as pharmaceuticals, phenol production, and phenolic resin production. It is a highly toxic and refractory wastewater common in industrial production. It has the characteristics of wide sources and great harm. If it is discharged without proper treatment, it will cause serious environmental pollution pollute. [0003] The liquid-liquid extraction method has the advantages of high efficiency and high selectivity, and can effectively reduce the phenol content in wastewater. The key lies in the design of the extractant. However, the traditional organic extraction solvents such as methyl isobutyl ketone and benzene are highly toxic and easily cause secondary pollution, which runs...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/26C02F101/34
Inventor 程海梅梁业新吕海钦黄颖孟庆国苑明哲
Owner SHENYANG INST OF AUTOMATION GUANGZHOU CHINESE ACAD OF SCI