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Compound extraction agent and method for rectifying industrial wastewater of propylene glycol methyl ether acetate by adopting compound extraction agent

A technology of propylene glycol methyl ether acetate and compound extractant, which is used in extraction water/sewage treatment, carboxylate preparation, special treatment targets, etc. Avoid waste of resources and environmental pollution, simplify the process flow, and have the effect of strong operability

Inactive Publication Date: 2018-12-14
ANQING XINXIANGRUI CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For this industrial wastewater, propylene glycol methyl ether acetate and water cannot be effectively separated by general rectification. The COD of industrial wastewater can be obtained by general rectification. cr It is 600000-650000mg / L

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Pour the industrial waste water containing propylene glycol methyl ether acetate into the rectification kettle, add 30% compound extractant according to the mass ratio, stir well, and rectify the organic phase and the water phase, add 3% activated carbon to the water phase according to the mass ratio for adsorption , after fully stirring, filter out the water phase, at this time the water phase COD Cr The value is 157086.

[0024] The compound extractant is composed of toluene and hydrocarbon cleaning agent, prepared according to the mass ratio of 1:1.5.

Embodiment 2

[0026] Put the industrial waste water containing propylene glycol methyl ether acetate into the rectification kettle, add 40% compound extractant according to the mass ratio, stir well, and rectify the organic phase and the water phase, add 3% activated carbon to the water phase according to the mass ratio for adsorption , after fully stirring, filter out the water phase, at this time the water phase COD Cr The value is 148351.

[0027] The compound extractant is composed of toluene and hydrocarbon cleaning agent, prepared according to the mass ratio of 1:1.8.

Embodiment 3

[0029] Pour the industrial waste water containing propylene glycol methyl ether acetate into the rectification kettle, add 30% compound extractant according to the mass ratio, stir well, and rectify the organic phase and the water phase, add 5% activated carbon to the water phase according to the mass ratio for adsorption , after fully stirring, filter out the water phase, at this time the water phase COD Cr The value is 151482.

[0030] The compound extractant is composed of toluene and hydrocarbon cleaning agent, prepared according to the mass ratio of 1:1.6.

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PUM

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Abstract

The invention discloses a compound extraction agent. The compound extraction agent is composed of toluene and a hydrocarbon cleaning agent, and is prepared from the toluene and the hydrocarbon cleaning according to a mass ratio of 1:1.5-1:2.0. The invention further discloses a method for rectifying industrial wastewater of propylene glycol methyl ether acetate by adopting the compound extraction agent. The method comprises the following steps: (1) adding the compound extraction agent into industrial wastewater containing propylene glycol methyl ether acetate; (2) rectifying out an organic phase and a water phase; and (3) adding activated carbon into the water phase for adsorbing metal ions and trace organic matter, and then filtering out a filtrate to obtain industrial wastewater with a CODcr value of 148000-152000 mg / L. According to the method, the CODcr value and metal ion content of the final industrial wastewater are remarkably reduced, and a process flow is simplified, so that working efficiency is improved. The operability is high, resource waste and environmental pollution are avoided, and wastewater treatment is facilitated.

Description

technical field [0001] The invention relates to the fields of solvent recovery and process wastewater treatment, in particular to a method for compound extraction and rectification treatment of propylene glycol methyl ether acetate industrial wastewater. Background technique [0002] At present, propylene glycol methyl ether acetate is widely used as a cleaning agent for LCD screens in optoelectronic enterprises. The used propylene glycol methyl ether acetate contains a large amount of water and metal ions and can only be treated as hazardous waste. [0003] Because propylene glycol methyl ether acetate has both ether bond and carbonyl group in its molecule, the carbonyl group forms an ester structure, and contains alkyl group at the same time, so that it has certain solubility to non-polar substances and polar substances. For this industrial wastewater, propylene glycol methyl ether acetate and water cannot be effectively separated by general rectification. The COD of indus...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C67/54C07C69/16C02F1/26C02F101/34
CPCC02F1/26C02F2101/34C02F2103/346C02F2303/18C07C67/54C07C69/16
Inventor 李向峰黄安宁高豹李星星曹庆
Owner ANQING XINXIANGRUI CHEM CO LTD