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Method for recovering propionyl triketone and sodium chloride from clethodim decarboxylation wastewater

A technology of propionyltrione and clethodim, which is applied in the field of recovery of propionyltrione and sodium chloride, can solve the problems that clethodim decarboxylation wastewater has not been effectively solved, the treatment is difficult, and wastewater treatment is difficult, so as to achieve the realization of waste water Recycling, small footprint, COD reduction effect

Pending Publication Date: 2022-07-12
BEIJING HUIYU LEBANG ENVIRONMENT PROTECTION TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The characteristics of this type of wastewater determine that the wastewater cannot be treated by simple coagulation sedimentation, biochemical and other traditional methods, and the treatment is difficult
[0006] The treatment of clethodim decarboxylation wastewater has not been effectively solved so far

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The wastewater treated in this example is taken from the clethodim decarboxylation wastewater of a chemical plant in Liaoning, and the water quality is as shown in Table 1.

[0031] Table 1 embodiment 1 clethodim decarboxylation wastewater water quality table

[0032] name Exterior odor pH COD (mg / L) Salt Cl- (mg / L) Decarboxylation wastewater light yellow Smelly 0.5 53293 20% 166735

[0033] Carry out the recovery treatment of clethodim decarboxylation wastewater according to the following steps:

[0034] (1) Preparation of separating agent: Measure 60mL of N503, 280mL of butyl dibutyl phosphate, 150mL of monohydric alcohol with 12 carbon atoms and 700mL of (1:1) mixed alkanes with carbon numbers of 15 and 20, and mix them evenly. Transparent and uniform, that is, the separating agent is prepared.

[0035] (2) Measure 2000 mL of the above clethodim decarboxylation wastewater, start stirring, adjust the pH to 1, add 300 mL of separ...

Embodiment 2

[0039] The wastewater treated in this example is taken from the clethodim decarboxylation wastewater of a chemical plant in Ningxia, and the water quality is as shown in Table 2.

[0040] Table 2 Water quality table of clethodim decarboxylation wastewater in Example 2

[0041] name Exterior odor pH COD (mg / L) Salt Cl- (mg / L) Decarboxylation wastewater yellow Smelly 1 48776 16% 124875

[0042] Carry out the recovery treatment of clethodim decarboxylation wastewater according to the following steps:

[0043] (1) Preparation of separating agent: measure 300mL N503, 75mL butyl dibutyl phosphate, 60g quaternary ammonium oxide salt, 250mL monohydric alcohol with 10 carbon atoms, and 750mL mixed with 11 and 15 carbon atoms (1:1). The alkanes are uniformly mixed, and the whole is transparent and uniform, that is, the separating agent is prepared.

[0044] (2) Measure 2000 mL of the above clethodim decarboxylation wastewater, start stirring, adju...

Embodiment 3

[0048] The wastewater treated in this example is taken from the clethodim decarboxylation wastewater of a chemical plant in Hebei, and the water quality is as shown in Table 3.

[0049] Table 3 Example 3 clethodim decarboxylation wastewater water quality table

[0050] name Exterior odor pH COD (mg / L) Salt Cl- (mg / L) Decarboxylation wastewater light yellow Smelly 0.5 51568 18% 143698

[0051] Carry out the recovery treatment of clethodim decarboxylation wastewater according to the following steps:

[0052] (1) Preparation of separating agent: Measure 260mL naphthenic acid, 150mL monohydric alcohol with carbon number of 16, and 640mL mixed alkane with carbon number of 13 and 21 (1:1), mix them evenly, and the whole is transparent and uniform, that is A separating agent is prepared.

[0053] (2) Measure 2000 mL of the above clethodim decarboxylation wastewater, start stirring, adjust the pH to 4, add 250 mL of separating agent to the clethod...

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Abstract

The invention relates to a method for recovering propionyl triketone and sodium chloride from clethodim decarboxylation wastewater, which comprises the following steps: adding a separating agent into the clethodim decarboxylation wastewater, and standing for layering to obtain an upper layer which is a separation phase and a lower layer which is a water phase; wherein the separating agent comprises a complexing agent, a cosolvent and a diluent; adding an alkaline solution into the separation phase, and standing for layering to obtain an upper layer which is a regenerated separating agent and a lower layer which is a sodium propionyltriketone solution; carrying out adsorption treatment on the water phase to obtain treated effluent; and evaporating the treated effluent to obtain evaporated effluent and sodium chloride. According to the method, toxic pollutants in the wastewater can be effectively recycled, the quality of subsequent evaporation salt is improved, propionyltriketone is recycled, the byproduct salt sodium chloride is obtained, wastewater recycling is achieved, and the method has the advantages of being easy to operate, high in pollutant removal rate and the like.

Description

technical field [0001] The invention relates to the technical field of fine chemical wastewater treatment, in particular to a method for recovering propionyl triketone and sodium chloride from clethodim decarboxylation wastewater. Background technique [0002] clethodim, chemical name: (E)-2-[1-(3-chloroallyloxyimino)propyl]-5-[2-(ethylthio)propyl]-3-hydroxycyclohexane -2-Enone. Clethodim is an excellent herbicide variety for upland fields, featuring low toxicity, low residue, high selectivity and wide application range. Its structural formula is: [0003] . [0004] The synthesis method of clethodim is as follows: in the presence of sodium hydroxide, the corresponding ketene is condensed and cyclized with diacetyl malonate to obtain 5-alkylcyclohexanedione-3-carboxylate; After hydrolysis and decarboxylation, react with propionyl chloride to generate 3-propionyloxy-5-alkylcyclohexenone; this product is dissolved in dichloromethane, and isomerization reaction is carried ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C07C319/28C07C323/22C01D3/04C02F101/34C02F101/38C02F103/36
CPCC02F9/00C07C319/28C01D3/04C02F1/28C02F1/04C02F1/40C02F1/66C02F2103/36C02F2101/38C02F2101/34C02F1/26C07C323/22Y02W10/37
Inventor 欧云川程迪杨宏伟
Owner BEIJING HUIYU LEBANG ENVIRONMENT PROTECTION TECH CO LTD
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