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Coupling complexing extraction agent composition and method for treating triazinone production wastewater

A technology for the production of waste water and compositions, applied in extraction water/sewage treatment, chemical instruments and methods, solvent extraction, etc., can solve the problems of low COD removal rate, limited application, high time cost, etc., and achieve high COD removal rate and wide application The effect of application prospect and simple processing process

Active Publication Date: 2021-08-13
BEIJING HUIYU LEBANG ENVIRONMENT PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These wastewater characteristics determine that the wastewater cannot be treated by traditional methods such as coagulation, sedimentation, and biochemistry, so it is very difficult to treat
[0004] The prior art has reported a lot of treatment methods for triazinone production wastewater, mainly including means such as resin adsorption, vacuum distillation and complex extraction, wherein the equipment involved in resin adsorption and vacuum distillation is expensive, and the time for large-scale processing The cost is too high, not suitable for large-scale promotion
Complexation extraction treatment of wastewater is cost-effective, but the removal rate of COD in the reported complexation treatment process is too low, which limits its application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The waste water used in this example is taken from the triazone production waste water of a certain chemical plant in Jiangsu, and the water quality is shown in Table 1 below.

[0047] Table 1 Triazinone Production Waste Water Quality Table

[0048] wastewater name pH Exterior COD (mg / L) Salt content (wt%) Chloride ion (mg / L) odor main compound Triazinone wastewater 1.5 yellow stench 20000 16% 98010 irritant Thiocarbazide, dichloropinatone, other organic carboxylic acid compounds

[0049] Firstly, take 50mL of butyl phosphate dibutyl ester, 300mL of N503, 150mL of isodecyl alcohol, and 600mL of mixed alkanes with carbon numbers of 10 and 18 (volume ratio 1:1), mix well, the whole is transparent and homogeneous, and complex extraction Agent ① is prepared. Then measure 2000mL of the above-mentioned triazone production wastewater, start stirring, adjust the pH to 4, add 400mL complex extraction agent ① to the wastewater, conduct l...

Embodiment 2

[0054] The waste water used in the present embodiment is the same as in Example 1, and the implementation is as follows:

[0055] Firstly, take 80mL of butyl phosphate dibutyl ester, 50g of quaternary ammonium chloride, 100mL of isononyl alcohol, and 650m of mixed alkanes with 8 and 16 carbon atoms (volume ratio 1:1), and mix them evenly. The whole is transparent and uniform. The complex extraction agent ① is prepared. Then measure 2000mL of the above-mentioned triazone production wastewater, start stirring, adjust the pH to 3, add 400mL complex extraction agent ① to the wastewater, conduct liquid-liquid mass transfer for 35-40 minutes, and let stand to separate. The upper layer is the extraction phase ① for regeneration treatment; the lower layer is the extracted waste water.

[0056] Then take 350mL of 2-ethylhexyl phosphoric acid and 700mL of mixed alkanes with carbon numbers of 10 and 18 (volume ratio 1:1), mix well, and the whole is transparent and homogeneous, and the c...

Embodiment 3

[0060] The waste water used in this example is taken from the triazone production waste water of a certain chemical plant in Hebei, and the water quality is as shown in Table 2.

[0061] Table 2 Triazinone Production Waste Water Quality Table

[0062] wastewater name Water volume t / d pH Exterior COD (mg / L) Salt content (%) Chloride (mg / L) odor Triazinone wastewater 200 1.5 yellow stench 18000 15% 10250 irritant

[0063] Firstly, take 350mL of tertiary amine, 100mL of isodecyl alcohol, and 650mL of mixed alkanes with carbon numbers of 10 and 18 (volume ratio 1:1), mix them evenly, and the whole is transparent and uniform. The complex extraction agent ① is prepared. Then measure 2000mL of the above-mentioned triazone production wastewater, start stirring, adjust the pH to 2, add 400mL complex extraction agent ① to the wastewater, conduct liquid-liquid mass transfer for 20-25 minutes, and let stand to separate layers. The upper layer is t...

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Abstract

The invention relates to a coupling complexing extraction agent composition and a method for treating triazinone production wastewater. The composition comprises a first composition and a second composition, the first composition comprises a first complexing agent and a first diluent; the second composition comprises a second complexing agent and a second diluent; the first complexing agent comprises at least one of N503, butyl dibutyl phosphate, quaternary ammonium chloride and tertiary amine; and the second complexing agent comprises at least one of naphthenic acid and 2-ethylhexyl phosphoric acid. The method comprises the following steps: adjusting the pH value of triazinone production wastewater to 2-4, adding a first composition, reacting, and layering to obtain an upper-layer first extraction phase and a lower-layer first water phase; and adjusting the pH value of the first water phase to 6-8, adding a second composition, reacting, and layering to obtain an upper-layer second extraction phase and a lower-layer second water phase. According to the method, organic acid, organic alkali and other toxic organic pollutants in the wastewater can be extracted and separated, the COD removal rate is higher than that in the prior art, and water obtained after complexing extraction can be reused in the production process.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a coupling complex extractant composition and a method for treating triazone production wastewater. Background technique [0002] Triazone, chemical name: diethylhexylbutyramide triazone. It is a class of heterocyclic compounds with potential biological activity. Pymetrozine, which has insecticidal activity, is a typical representative of triazinone compounds, and has the characteristics of high efficiency, low toxicity and environmental friendliness. Triazinone is an intermediate in the manufacture of the herbicide, mecitrione. [0003] Triazone is obtained by hydrolysis-catalytic oxidation-neutralization-cyclization, specifically: add a certain amount of water and liquid alkali to dichloropinatone for hydrolysis reaction to obtain 3, 3-dimethyl-2- An aqueous solution of sodium hydroxybutyrate, adding an oxidation catalyst to the aqueous solution, and performing a...

Claims

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Application Information

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IPC IPC(8): C02F1/26B01D11/04C01D3/04C02F103/36
CPCB01D11/0492C01D3/04C02F1/26C02F2103/36C02F2209/08
Inventor 程迪欧云川杨宏伟李慧权
Owner BEIJING HUIYU LEBANG ENVIRONMENT PROTECTION TECH CO LTD
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