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Method for preparing catalyst for treating high-concentration organic wastewater through catalytic oxidation

A technology of organic wastewater and catalytic oxidation, which is applied in the direction of catalyst activation/preparation, oxidized water/sewage treatment, metal/metal oxide/metal hydroxide catalyst, etc. It can solve the problems of large investment and high treatment cost, and achieve long life , low equipment investment, good degradation effect

Inactive Publication Date: 2009-12-16
ENVIRONMENTAL SCI RES & DESIGN INST OF ZHEJIANG PROVINCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of process has not been improved for Fenton's reagent, and the disadvantages of large investment and high processing cost are common in the application of this type of process.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] 1) Dry the coconut shell activated carbon at 100°C for 8 hours, take it out, add it to a 2% sulfuric acid solution, and then soak for 12 hours, add 1% hydrogen peroxide solution, soak for 12 hours, take it out, and dry it in the shade to obtain activated carbon for use. ;

[0016] 2) The activated carbon is immersed in an equal volume of the transition metal salt solution, immersed for 12 hours, dried at 100°C for 8 hours, and then calcined at 300°C for 3 hours to obtain a catalyst for catalytic oxidation treatment of high-concentration organic wastewater. The metal is Mn, and the amount of transition metal salt is 0.2% by weight of the activated carbon.

[0017] The prepared catalyst catalyzes and oxidizes the wastewater from the organic auxiliary plant

[0018] The COD value of wastewater is 6452.4mg / L, mainly containing cyanobenzyl chloride, triethyl phosphite, terephthalaldehyde, DMF, cyanuric chloride, etc. The pH value of the wastewater is adjusted to 2 with acid, and...

Embodiment 2

[0020] 1) Dry the coconut shell activated carbon at 120°C for 15 hours, take it out, add it to a 10% sulfuric acid solution, then soak for 36 hours, add 10% hydrogen peroxide solution, soak for 36 hours, take it out, and dry it in the shade to obtain activated carbon for use. ;

[0021] 2) The activated carbon is immersed in an equal volume of the transition metal salt solution, immersed for 36 hours, dried at 120°C for 15 hours, and then calcined at 650°C for 8 hours to obtain a catalyst for catalytic oxidation treatment of high-concentration organic wastewater. The metals are Fe, Mn, and Cu, and the amount of transition metal salt is 10 wt% of the activated carbon.

[0022] The prepared catalyst catalyzes and oxidizes the organic chemical plant wastewater

[0023] The COD value of wastewater from organic chemical plants is 5674mg / L, mainly containing cyanobenzyl chloride, ethanolamine, DSD acid, DMF, cyanuric chloride, etc. First adjust the pH value of the wastewater to 5 with a...

Embodiment 3

[0026] 1) Dry coconut shell activated carbon at 110°C for 12 hours, take it out and add it to 10% sulfuric acid solution, then immerse it for 24 hours, add 10% hydrogen peroxide solution, immerse it for 24 hours, take it out, and dry it in the shade to obtain activated carbon for use. ;

[0027] 2) The activated carbon is immersed in an equal volume of the transition metal salt solution, immersed for 36 hours, dried at 120°C for 15 hours, and then calcined at 500°C for 12 hours to obtain a catalyst for catalytic oxidation treatment of high-concentration organic wastewater. The metals are Ce, Zn, Cu, and Mn, and the loading amount is 10wt% of the activated carbon. The prepared catalyst catalytic oxidation method treats chemical production wastewater

[0028] 1. The COD value of mixed wastewater from chemical production plants is 18677.3mg / L, which mainly contains a large amount of phenol compounds, halogenated aliphatic compounds, aromatic hydrocarbons, halogenated aromatic compoun...

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Abstract

The invention discloses a method for preparing a catalyst for treating high-concentration organic wastewater through catalytic oxidation, which comprises the following steps: 1) drying a cocoanut active charcoal at a temperature of between 100 and 120 DEG C for 8 to 15 hours, taking out and adding the cocoanut active charcoal into 2 to 10 percent sulfuric acid solution to perform soakage for 12 to 36 hours, adding the cocoanut active charcoal into a 1 to 10 percent oxydol solution to perform soakage for 12 to 36 hours, taking the cocoanut active charcoal out, and draying the cocoanut active charcoal in shade to obtain an activated charcoal for standby; and 2) soaking constant volume of the activated charcoal into transition metal salt solution for 12 to 36 hours, drying the activated charcoal at a temperature of between 100 and 120 DEG C for 8 to 15 hours, and calcining the activated charcoal at a temperature of between 300 and 650 DEG C for 3 to 8 hours to obtain the catalyst for treating the high-concentration organic wastewater through the catalytic oxidation. The service life of an active charcoal catalyst bed prepared by the method can reach over 0.5 to 1 year. After the treatment of the wastewater, compared with a Fenton reagent, the treatment efficiency of the catalyst is improved obviously, and the treatment cost is reduced by about 20 percent.

Description

Technical field [0001] The invention relates to a preparation method of a catalyst, in particular to a preparation method and application of a catalyst for catalytic oxidation treatment of high-concentration wastewater. Background technique [0002] Catalytic oxidation technology is a very effective advanced chemical oxidation water treatment technology, especially suitable for the treatment of toxic and harmful and high-concentration organic wastewater. Catalytic oxidation technology has high treatment efficiency, low secondary pollution, fast oxidation speed, and small equipment size. It has received widespread attention and has good application prospects. In the existing catalytic oxidation technology, the Fenton reagent method produces high-efficiency hydroxyl radical ions, which can effectively treat some refractory organic wastewater. It uses H 2 O 2 As oxidant, Fe 2+ Or Fe 3+ As a catalyst, Fe 2+ Or Fe 3+ Can speed up H 2 O 2 It is decomposed into ·OH, and the organic matt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/34B01J23/889B01J21/18B01J37/02C02F1/72C02F101/30C02F103/36C02F103/30
Inventor 徐灏龙章一丹朱虹
Owner ENVIRONMENTAL SCI RES & DESIGN INST OF ZHEJIANG PROVINCE
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