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A diisopropyl ether-based high-concentration phenol-containing wastewater extractant and extraction method

A diisopropyl ether, high-concentration technology, applied in chemical instruments and methods, extraction water/sewage treatment, water pollutants, etc., to achieve the effect of large operating flexibility range, low solubility, and easy control

Active Publication Date: 2021-10-08
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 shortcomings and deficiencies of the existing extractant diisopropyl ether, the primary purpose of the present invention is to provide a high-concentration phenol-containing wastewater extractant based on diisopropyl ether

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The high concentrated coal chemical simulation of the deductions of wastewater, with a total ghetin content of 6500 mg / L, a cell phenol content of 4000 mg / L, polyphenol content 2500 mg / L. The 3-stage countercurrent extraction was performed using an extraction crop experimental method, wherein the extractant is a synergist (a volume fraction of 50% of the diisopropyl ether + volume fraction of 50% is mixed for 90 min, and stands for 120 min. The extraction temperature was 60 ° C, the extraction pH is 7, the volume ratio of the extractant and the phenolic wastewater is 1: 5.5.

[0031] The total phenol content of the phenol after extraction is less than 200 mg / L, wherein the unit phenol is less than 0 mg / L, and the polyphenols are less than 200 mg / L; total phenol, phenol and polyphenol deletion reach 96.9%, 100%, 92.0%, respectively. .

Embodiment 2

[0033] High concentrated coal chemical simulation of wastewater to be treated, with a total gyne content of 6000 mg / L, a phenol content of 2000 mg / L, and a polyphenol content of 4000 mg / L. The 5-stage countercurrent extraction was performed using an extraction cascade experiment method, wherein the extractant is a synergist (a volume fraction of 10%) of a diisopropyl ether + volume fraction of 90% orthopentyl alcohol. The mixture is stirred for 30 min, and stands for 90 min. The extraction temperature was 60 ° C, the extraction pH is 5, the volume ratio of the extractant and the phenolic wastewater is 1: 2.

[0034] The phenolic glyph content of the phenol was 0 mg / L after extraction, wherein the cell phenol 0mg / L, polyphenols 0 mg / L; total phenol, phenol and polyphenol removal rate reached 100%, 100%, 100%, respectively.

Embodiment 3

[0036] High concentrated coal chemical simulation of wastewater treatment, with a total ghenol content of 12,000 mg / L, a phenol content of 6000 mg / L, and a polyphenol content of 6000 mg / L. 6-stage countercurrent extraction was carried out by a collateral experiment method, wherein the extractant is a synergist (a volume fraction of 40% diisopropyl ether + volume fraction of 60% n-and-pentanol), mixed with stirring for 50 min, standing for 50 min, The extraction temperature was 60 ° C, the extraction pH is 6, and the volume ratio of the extractant and the phenolic wastewater is 1: 6.

[0037] The total phenolic gap level after extraction was less than 60 mg / L, wherein the cell phenol 0 mg / L, polyphenols were less than 60 mg / L; total phenol, cell phenol, and polyphenol removal rates reached 99.5%, 100%, 99.0%, respectively.

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Abstract

The invention belongs to the technical field of sewage treatment and discloses a diisopropyl ether-based high-concentration phenol-containing wastewater extractant and an extraction method. The extractant is composed of diisopropyl ether with a volume fraction of 1% to 99% and n-amyl alcohol with a volume fraction of 1% to 99%. The extraction method is as follows: using the extraction agent to perform multistage countercurrent extraction of polyphenols in high-concentration phenol-containing wastewater, and recover the extraction agent by stripping the raffinate phase and rectifying the extraction phase. Compared with the single extractant diisopropyl ether, the synergistic extractant of the present invention has a significant extraction effect on phenolic substances, especially polyphenols.

Description

Technical field [0001] The present invention belongs to the field of sewage treatment, and more particularly to a high concentration-containing wastewater extractant and a extraction method based on diisopropyl ether. Background technique [0002] High concentrated phenol wastewater mainly derived from gasification, coal lifting material, coal tar hydrogenation, coal low-temperature dry distillation. The total amount of Lanzhou-carbon waste water was 35000-40000 mg / L, total phenol content of 16000 mg / L, wherein the cell phenol content is about 6000 mg / L, and the polyphenol content is about 10,000 mg / L. Phenolic substances are difficult to degraded, toxic, and direct discharge will cause great damage to the environment, and the microorganisms of the subsequent biochemical treatment are poisonous, reducing the labilibility of wastewater. In summary, high-purity and high pollution of environmental and ecological high contamination, which is currently industrially recovered. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/26C02F101/34
CPCC02F1/26C02F2101/345
Inventor 杨思宇曹琦陈博坤钱宇
Owner SOUTH CHINA UNIV OF TECH
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