Ferric oxide catalyst carried by active carbon and method for preparation thereof

A technology of activated carbon and iron oxide, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve the problems of high equipment cost, expensive catalyst, and application limitations , to achieve the effects of simple preparation method, low processing cost and easy operation

Inactive Publication Date: 2007-02-28
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, a variety of transition metal oxides are considered to have catalytic activity for wet oxidation. The noble metal series mentioned by Du Hongzhang and Fang Lianqing of Dalian Institute of Chemical Physics in (Water Treatment Technology 23 (1997, 2) 83-87) The catalyst has high activity and long life, and is a more effective catalyst for catalytic wet oxidation. However, due to the high price of the catalyst used in this method and the high cost of equipment used in sewage treatment, its application is greatly limited.

Method used

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  • Ferric oxide catalyst carried by active carbon and method for preparation thereof
  • Ferric oxide catalyst carried by active carbon and method for preparation thereof
  • Ferric oxide catalyst carried by active carbon and method for preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1: Use 2.5% FeCl 3 A 1.0% iron oxide-supported activated carbon supported iron oxide catalyst was prepared from the solution.

[0026] The method includes the following steps:

[0027] (1) The activated carbon is immersed in a 10% NaOH solution for 24 hours, then filtered, and washed with deionized water to neutrality.

[0028] (2) The activated carbon treated in step (1) was immersed in 1:1 HCl solution for 24 hours, filtered, washed with deionized water to neutrality, placed in an oven, and dried at 110°C.

[0029] (3) Add 20 g of activated carbon treated in step (2) to 150 mL of 2.5% FeCl 3 In the solution, stir for 1h, then soak for 24h, filter and wash with deionized water until there is no Fe 3+ After precipitation, it was placed in an oven and dried at 110°C for 6 hours to obtain activated carbon-supported iron oxide solid.

[0030] (4) The activated carbon-supported iron oxide solid obtained in step (3) is activated at 260° C. for 12 hours to prepare an acti...

Embodiment 2

[0031] Example 2: Use 5.0% FeCl 3 A 2.0% iron oxide supported iron oxide catalyst on activated carbon was prepared from the solution.

[0032] The difference between the second embodiment and the first embodiment is:

[0033] (3) Add 20 g of activated carbon treated in step (2) to 150 mL of 5.0% FeCl 3 In the solution, stir for 1h, then soak for 24h, filter and wash with deionized water until there is no Fe 3+ After precipitation, it was placed in an oven and dried at 120°C for 6 hours to obtain activated carbon-supported iron oxide solid.

[0034] (4) The activated carbon-supported iron oxide solid obtained in step (3) is activated at 270° C. for 12 hours to prepare an activated carbon-supported iron oxide catalyst with 2.0% iron oxide.

Embodiment 3

[0035] Example 3: Use 20.0% FeCl 3 The activated carbon supported iron oxide catalyst with 5.0% iron oxide was prepared from the solution.

[0036] The difference between the third embodiment and the first embodiment is:

[0037] (3) Add 20 g of activated carbon treated in step (2) to 150 mL of 20.0% FeCl 3 In the solution, stir for 1h, then soak for 24h, filter and wash with deionized water until there is no Fe 3+ After precipitation, it was placed in an oven and dried at 120°C for 6 hours to obtain activated carbon-supported iron oxide solid.

[0038] (4) The activated carbon-supported iron oxide solid obtained in step (3) is activated at 260° C. for 12 hours to prepare an activated carbon-supported iron oxide catalyst supporting 5.0% iron oxide.

[0039] The activated carbon-supported iron oxide catalyst prepared by the method for preparing the activated carbon-supported iron oxide catalyst: its components and content are 1.0-10.0% by weight of iron oxide, and 90.0-99.0% by ...

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Abstract

The invention discloses an activated charcoal ferric oxide carrying catalyst and preparing method in the waste water disposal of phenolic coking water and phenolic waste water, which is characterized by the following: adopting iron sesquichloride and activated charcoal as raw material, carrying ferric oxide on the activated charcoal, drying at 110-120 deg.c for 6h, solidifying at 260-270 deg.c for 12h to obtain the product. The invention reduces CODcr value from 1190mg/L to 70.1mg/L for phenol solution, which is lower than national discharge standard.

Description

Technical field [0001] The invention relates to a catalyst for treating sewage and a preparation method thereof. The catalyst is suitable for treating phenol-containing wastewater and coking wastewater at 20-25°C. Background technique [0002] Phenol-containing wastewater is a kind of industrial wastewater that is very harmful to humans and is widespread. Phenolic compounds can coagulate proteins and are extremely harmful to humans, aquatic products and crops. The coking process in the iron and steel industry and coal gasification industry uses coal as the raw material. The coal is heated to 960-1000°C under the condition of isolating air to obtain coke and some chemical products. At the same time, a large amount of difficult-to-biodegradable products are produced during the production process. Aromatic organic compounds, heterocyclic and polycyclic compounds, with high phenol content, are difficult to deal with. If these pollutants are discharged with wastewater without treatmen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745B01J21/18C02F1/72C02F101/34
Inventor 许韵华杨玉国陈敏
Owner BEIJING JIAOTONG UNIV
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