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Method for catalytically oxidizing wastewater by carbonyl iron complex

A technology for catalytic oxidation and carbonyl compounds, applied in chemical instruments and methods, oxidized water/sewage treatment, organic compounds/hydrides/coordination complex catalysts, etc., can solve the problems of complicated treatment process and high treatment cost, and achieve The effect of reducing dosage, expanding the range of pH value and reducing cost

Inactive Publication Date: 2012-10-03
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it can be seen that the processing process is more complicated and the processing cost is increased.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The carbonyl iron complex catalytic oxidation method is used to treat dye wastewater. The mass concentration of COD is 1050mg / L and the pH value is 5.5. 5.5; 3) Add ferrous sulfate, a compound containing iron ions, the amount of iron ions added is 65mg / L, and the molar ratio of iron ions to propionaldehyde is 1:1, and react at 25°C for 20 minutes; 5) Add 30% oxidant hydrogen peroxide , the molar ratio of oxidant to iron ion is 30:1, and the oxidation reaction is carried out at 25°C.

[0028] Example 1 comparison.

[0029] The difference from Example 1 is that no carbonyl compound is added to the aqueous dye solution.

[0030] The oxidant consumed to remove the COD per unit mass was 8% more in the control group than in the examples.

Embodiment 2

[0032] The difference from Example 1 is that the carbonyl compound added is propionic acid, the molar ratio of iron ion to propionic acid is 1:4, the pH value is adjusted to 4.5 with sulfuric acid, and the molar ratio of oxidant to iron ion is 35:1,35 The complexation and oxidation reactions are carried out at ℃, and the complexation reaction takes 10 minutes.

[0033] The oxidant consumed to remove the COD per unit mass is 6% more than that of the example.

Embodiment 3

[0035] The difference from Example 1 is that the carbonyl compound added is butyric acid, the molar ratio of iron ion to butyric acid is 1:3, the pH value is adjusted to 3.5 with sulfuric acid, and the molar ratio of oxidant to iron ion is 45:1,45 The complexation and oxidation reactions are carried out at ℃, and the complexation reaction takes 8 minutes.

[0036] The oxidant consumed to remove the COD per unit mass is 6% more than that of the example.

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Abstract

The invention relates to a method for catalytically oxidizing wastewater by carbonyl iron complex, and belongs to the technical field of metal complex catalytic oxidation. The method comprises the following steps of: 1) adding a carbonyl compound-containing ligand in water solution; 2) adjusting the pH value to be 1.5-5.5; 3) adding a ferric ion-containing compound, wherein the addition of the ferric ion is 5-65mg / L and the mole ratio of the ferric ion to the carbonyl compound-containing ligand is 1: 1-4; 4) reacting at 5-65 DEG C for 5-30min; and 5) adding oxidant to carrying out oxidation at 5-65 DEG C, wherein the carbonyl compound is primary amine or aliphatic or aromatic compound of primary amine and the ferric ion-containing compound is inorganic compound of divalent or trivalent iron. According to the invention, the catalytic effect is effectively improved, the dosage of iron is reduced and the oxidation efficiency is improved, so that the oxidant consumed by unit mass COD (chemical oxygen demand) is reduced and the wastewater treatment cost is effectively reduced.

Description

technical field [0001] The invention relates to the technical field of metal complexes, in particular to a carbonyl iron complex catalytic oxidation wastewater method. Background technique [0002] Hydrogen peroxide (also known as hydrogen peroxide) and oxygen, as the cheapest and cleanest oxygen sources, have become the focus of research and development in oxidation reactions. Molecular oxidation of hydrocarbons under mild conditions is the most ideal way to convert hydrocarbons into oxygen-containing organic compounds. Under these conditions, the epoxidation of olefins, such as the synthesis of ethylene oxide; the hydroxylation of aromatics, such as the direct synthesis of phenol from benzene; the functionalization of saturated hydrocarbons, such as the direct synthesis of benzaldehyde; in addition, cyclohexene The direct synthesis of adipic acid and the like are all important problems to be solved in chemical production. However, due to the kinetic inertia of molecular ...

Claims

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Application Information

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IPC IPC(8): C02F1/72B01J31/28
Inventor 吴玉凯王立忠艾庆祝赵之平辛宝平丁春淡祝婕祝文秀张衍文
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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