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Extracting agent for treatment of wastewater in 2.4-D pesticide production

An extraction agent and extraction technology, which is applied in natural water treatment, water/sewage treatment, extraction water/sewage treatment, etc., can solve the problem that the water phase and the extraction phase cannot be completely separated, the mass transfer driving force is reduced, and the solute extraction rate is reduced and other problems, to achieve the effect of recovering the extraction effect, easy separation, and less carrier consumption

Inactive Publication Date: 2012-07-04
蓝星工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the ELM system complicates the process due to the introduction of surfactants. It must be composed of three processes: milk making, extraction, and demulsification. The membrane leakage of ELM reduces the extraction rate of solutes, and the liquid due to entrainment and osmotic pressure difference The swelling of the membrane leads to the dilution of the concentrated solute in the internal phase, the reduction of the mass transfer driving force and the decrease of the membrane stability. In addition, there are problems such as the incomplete separation of the aqueous phase and the extraction phase after the demulsification, which limits its The successful application of

Method used

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  • Extracting agent for treatment of wastewater in 2.4-D pesticide production
  • Extracting agent for treatment of wastewater in 2.4-D pesticide production

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) The waste water used was taken from the acid waste water in Hubei Sanonda 2,4-D pesticide production waste water. The composition of the waste water is shown in Table 1.

[0027]

[0028] (2) Take the wastewater composed in Table 1, take 90 mL of complexing agent TOA (trioctylamine), 90 mL of co-solvent isooctyl alcohol, and 120 mL of diluent kerosene, mix them in a container containing 3000 mL, and turn on the stirrer (Stirrer speed is set to 2500r / min), stirring time is 30 min, after the extraction reaction is completed, pour it into the separator and let it stand for separation, and separate the oil and water two phases after the lower water phase is clarified. After testing, the concentrations of 2,4-D and 2,4-dichlorophenol in the raffinate aqueous phase separated after the extraction were 11.2 and 7.3 ppm, respectively. The concentrations of the two in the mother liquor wastewater are shown in Table 1. The calculated extraction rates reached 97.4% and 98.0%...

Embodiment 2

[0031](1) Take the wastewater in Table 1, take 100 mL of complexing agent trioctyl phosphate, 100 mL of co-solvent xylene, and 150 mL of diluent kerosene, mix them evenly and place them in a container containing 3500 mL, and turn on the stirrer (stirrer The rotation speed was set at 2500r / min), and the stirring time was 30 min. After the extraction reaction was completed, it was poured into a separator and left to stand for separation. After the lower aqueous phase was clarified, the oil and water phases were separated. After testing, the concentrations of 2,4-D and 2,4-dichlorophenol in the raffinate aqueous phase separated after the extraction are 45.1 and 112.4 ppm respectively, and the concentrations of the two in the mother liquor wastewater are the same as in Example 1, and the extraction rate is calculated They reached 89.7% and 68.5% respectively.

[0032] (2) Prepare 350mL of NaOH solution with a pH value of 11, mix it with the above separated oil phase and stir for 2...

Embodiment 3

[0034] (1) Take the wastewater in Table 1, take 100mL of complexing agent TOA (trioctylamine), 100mL of co-solvent n-octanol and 150mL of diluent xylene, put them in a container and mix them well, then take 2,4 -D Pesticide production wastewater 3500mL is placed in another container, then the prepared extractant is poured into the pesticide production water container and the two are stirred (the stirrer speed is set to 2500r / min) and mixed for 30min, and then poured into the separation Stand in the vessel for separation, and separate the oil and water phases after the lower water phase is clarified. The concentrations of 2,4-D and 2,4-dichlorophenol in the aqueous raffinate separated after 30 min of extraction were 9.8 and 6.3 ppm, respectively, and the extraction rates reached 97.8% and 98.2%, respectively.

[0035] (2) Prepare 350mL of NaOH solution with a pH value of 11, mix it with the above separated oil phase and stir for 20 min. After clarification, the oil phase and w...

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Abstract

The invention provides an extracting agent for removing toxic pollutants of 2.4-D and 2.4-dichlorophenol in 2.4-D pesticide production wastewater, which mainly comprises a complexing agent, a cosolvent and a diluent. The extraction process can adopt the traditional extraction process, and the extracting agent can also be used as a supporting liquid membrane. The extracting agent provided by the invention has the advantages of high extraction efficiency, low effluent wastage rate, easy engendering transformation, low regeneration loss and the like, and is a key technology for solving the treatment and recovery of 2.4-D pesticide production waste water.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to an extraction method for removing 2,4-D and 2,4-dichlorophenol, the main pollutants in 2,4-dichlorophenoxyacetic acid (2,4-D) pesticide production wastewater agent, belonging to the field of pesticide production wastewater treatment. Background technique [0002] 2,4-dichlorophenoxyacetic acid (2,4-D) and various derivatives produced from 2,4-dichlorophenol are phenoxycarboxylic acid herbicides, which play an important role in increasing the yield of crops It plays an important role and has a wide range of applications. Wastewater containing toxic pollutants such as 2,4-D and 2,4-dichlorophenol is produced in the production process. At present, there are almost no successful examples of methods that can completely treat this type of waste water. The pollution and treatment of this type of waste water have become constraints The bottleneck problem of industry...

Claims

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Application Information

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IPC IPC(8): C02F1/26C02F1/58C02F103/36C02F101/36
Inventor 杨慧敏郭春禹吉春红郑东晟赵雪娜海龙洋李江郭嘉朱东华王晓琴
Owner 蓝星工程有限公司
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