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A kind of dephenol extraction agent and its preparation method and application

A dephenolization extractant and extraction technology are applied in the field of dephenolization extractant and its preparation, which can solve the problems of increasing waste water toxicity, difficulty in waste water treatment and utilization, etc., so as to reduce biological toxicity, facilitate industrial operation, and improve removal efficiency. Effect

Active Publication Date: 2022-06-14
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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  • A kind of dephenol extraction agent and its preparation method and application
  • A kind of dephenol extraction agent and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0049] A dephenolizing extractant, comprising by volume percentage: 80% methyl isobutyl ketone, 10% isoamyl alcohol (co-extracting agent) and 10% 3-heptanone (antioxidant); mixing the above components uniform to obtain the dephenolized extractant.

[0050] The dephenolizing extractant is used for the treatment of phenol-containing wastewater, and the treatment method is as follows:

[0051] The stability of the simulated phenol-containing wastewater is controlled at 25 °C, and the pH value is adjusted to 7, and then the dephenolizing extractant provided in this example and the simulated phenol-containing wastewater are extracted in a separatory funnel in a volume ratio of 1:1. , wherein mixing for 30min, standing for 30min, to obtain the extraction phase and the raffinate phase.

[0052] The content of substances in the raffinate phase was detected by chromatography, and the results were as follows: the content of phenol was 50.43 mg / L, the content of catechol was 79.22 mg / L,...

Embodiment 2

[0054] A dephenolizing extractant, comprising by volume percentage: 45% methyl isobutyl ketone, 45% n-amyl alcohol (co-extracting agent) and 10% 4-heptanone (antioxidant); mixing the above components uniform to obtain the dephenolized extractant.

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

[0056] The substance content in the raffinate phase was detected by chromatography, and the specific test results are shown in Table 1.

Embodiment 3

[0058] A dephenolizing extractant, comprising by volume percentage: 70% methyl isobutyl ketone, 25% n-hexanol (co-extracting agent) and 5% 2-hexanone (antioxidant); the above components are mixed evenly , to obtain the dephenolized extractant.

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

[0060] The substance content in the raffinate phase was detected by chromatography, and the specific test results are shown in Table 1.

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Abstract

The present invention provides a kind of dephenol extraction agent and its preparation method and application, described dephenol extraction agent comprises the combination of methyl isobutyl ketone, co-extraction agent and antioxidant; Said antioxidant comprises C6~C9 saturated aliphatic Ketones and / or C7-C9 saturated aliphatic alcohols. The compounding of specific components of the dephenol extractant can synergize the dephenol efficiency on the one hand, and effectively inhibit the ionization and oxidation of phenolic substances during the extraction process, significantly reducing the phenolic oxygen anions, Quinones and their derivatives and other pollutants that are more difficult to remove and more toxic. The dephenol extraction agent is used in the treatment of phenol-containing wastewater, has a wide range of volume ratio and pH applicable range, is easy to realize industrial operation, has high extraction efficiency of unit phenols and polyphenols, and the single-stage extraction efficiency of total phenols reaches more than 97.4%. , the concentration of the oxidation product benzoquinone in the extracted wastewater is extremely low, which reduces the biological toxicity of the wastewater and is beneficial to the subsequent biochemical treatment.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment and resource utilization, and particularly relates to a dephenolizing extractant and a preparation method and application thereof. Background technique [0002] In the chemical industry, high-concentration phenol-containing wastewater is generated in the processes of cooling, washing and purification in the processes of Luqi gasification, BGL gasification, coal low-temperature dry stuffing, and coal tar hydrogenation. The characteristics of high pollutant concentration, high toxicity and low biodegradability have attracted widespread attention in the environmental protection industry. Wastewater contains high concentrations of ammonia nitrogen, phenols and oil substances, as well as heterocyclic compounds and polycyclic aromatic hydrocarbons and other highly toxic pollutants. Extremely difficult. At present, the main method for treating phenol-containing wastewater is extraction method. ...

Claims

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Application Information

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Patent Type & Authority Patents(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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