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Dephenolization extraction agent as well as preparation method and application thereof

A dephenolization extractant and extraction technology are applied in the field of dephenolization extractant and its preparation, which can solve the problems of difficult wastewater treatment and utilization, increase wastewater toxicity, etc., and achieve easy industrial operation, reduced biological toxicity, and efficient removal. Effect

Active Publication Date: 2021-05-18
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Although the extraction efficiency of phenol can be significantly improved by the combination of extractant and co-extractant in the above-mentioned prior art, people have gradually found in actual operation that under neutral or alkaline conditions, methyl isobutyl ketone extractant, Or a composite extractant composed of methyl isobutyl ketone as the main extractant and low-boiling point alcohol as a co-extractant, because the extractant has a high solubility in water and is dissolved in the extractant and the water phase in water The solvation of phenols will promote the oxidation of phenolic substances in the water phase, and generate more toxic and difficult to extract phenolic anions, quinones and their derivatives, which greatly increase the toxicity of wastewater in the raffinate , making wastewater treatment and utilization more difficult

Method used

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  • Dephenolization extraction agent as well as preparation method and application thereof
  • Dephenolization extraction agent as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0049] A kind of dephenol extraction agent, comprises according to volume percentage: 80% methyl isobutyl ketone, 10% isoamyl alcohol (co-extractant) and 10% 3-heptanone (antioxidant); Mix the above-mentioned components homogeneously, to obtain the dephenol extraction agent.

[0050] The dephenol extraction agent is used for the treatment of phenolic wastewater, and the treatment method is as follows:

[0051] The stability of the simulated phenol-containing wastewater was controlled at 25°C, and the pH value was adjusted to 7, and then the dephenol-removing extractant provided in this example and the simulated phenol-containing wastewater were subjected to extraction experiments in a separating funnel at a volume ratio of 1:1. , where they were mixed for 30 min and allowed to stand for 30 min to obtain an extract phase and a raffinate phase.

[0052] Chromatography is used to detect the substance content in the raffinate phase, and the results are as follows: the phenol cont...

Embodiment 2

[0054] A kind of dephenol extraction agent, comprises according to volume percentage content: 45% methyl isobutyl ketone, 45% n-amyl alcohol (co-extractant) and 10% 4-heptanone (antioxidant); Above-mentioned components are mixed homogeneously, to obtain the dephenol extraction agent.

[0055] The dephenol extraction agent is used for the treatment of phenol-containing wastewater, and the treatment method is the same as in Example 1 to obtain an extract phase and a raffinate phase.

[0056] Chromatography was used to detect the substance content in the raffinate phase, and the specific test results are shown in Table 1.

Embodiment 3

[0058] A kind of dephenol extraction agent, comprises according to volume percentage: 70% methyl isobutyl ketone, 25% n-hexanol (co-extractant) and 5% 2-hexanone (antioxidant); above-mentioned components are mixed homogeneously , to obtain the dephenol extraction agent.

[0059] The dephenol extraction agent is used for the treatment of phenol-containing wastewater, and the treatment method is the same as in Example 1 to obtain an extract phase and a raffinate phase.

[0060] Chromatography was used to detect the substance content in the raffinate phase, and the specific test results are shown in Table 1.

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Abstract

The invention provides a dephenolization extraction agent as well as a preparation method and application thereof. The dephenolization extraction agent comprises a combination of methyl isobutyl ketone, a synergistic extraction agent and an antioxidant, wherein the antioxidant comprises C6-C9 saturated aliphatic ketone and / or C7-C9 saturated aliphatic alcohol. According to the dephenolization extraction agent, through compounding of specific components, on one hand, synergistic interaction is achieved on the dephenolization efficiency, on the other hand, ionization and oxidation of phenolic substances in the extraction process can be effectively inhibited, and the content of pollutants such as phenoxy anions, quinones and derivatives thereof which are higher in removal difficulty and higher in toxicity in wastewater is remarkably reduced. The dephenolization extraction agent is used for treating phenol-containing wastewater, the volume ratio range and the pH application range are wide, industrial operation is easy to achieve, the extraction efficiency of monohydric phenol and polyhydric phenol is high, the single-stage total phenol extraction efficiency reaches 97.4% or above, the concentration of an oxidation product benzoquinone in the extracted wastewater is extremely low, the biotoxicity of the wastewater is reduced, and the subsequent biochemical treatment is facilitated.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment and resource utilization, and in particular relates to a dephenol extraction agent and its preparation method and application. Background technique [0002] In the chemical industry, Lurgi gasification, BGL gasification, coal low-temperature dry stuffing, coal tar hydrogenation and other processes produce high-concentration phenol-containing wastewater in processes such as cooling, washing and purification. High-concentration phenol-containing wastewater has complex components, The characteristics of high pollutant concentration, high toxicity, and low biodegradability have attracted widespread attention from the environmental protection industry. Wastewater contains high concentrations of ammonia nitrogen, phenols, and oily substances, as well as highly toxic pollutants such as heterocyclic compounds and polycyclic aromatic hydrocarbons. It is extremely difficult. At present, the main m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/26C02F101/34C02F103/36C02F103/38C02F103/30C02F103/28C02F103/12
CPCC02F1/26C02F2101/345C02F2103/365C02F2103/38C02F2103/30C02F2103/28C02F2103/12
Inventor 宁朋歌曹宏斌
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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