Method and application of preparing high-level oxidation catalyst through cobalt ore smelting slag

An advanced oxidation and catalyst technology, applied in the field of solid waste recycling, to overcome easy loss, improve oxidation efficiency, and the process is simple and controllable.

Active Publication Date: 2012-10-31
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Although the transition metal Co 2+ 、Ag + 、Cu 2+ , Fe 2+ Both have catalytic persulfate or monoperoxyhydrogensulfate to generate active SO 4 · - ability, but due to the use of the transition state Co 2+ Catalytic Potassium Monoperoxyhydrogen Sulfate KHSO 5 (PMS type advanced oxidation system) produced SO 4 · - Active species not only have high free radical generation efficiency, but also can maintain high oxidation activity in a wide pH range (3-8), so it is generally considered to be a better way to generate SO 4 · - The method of using this method to generate sulfuric acid free radicals for advanced oxidative degradation of wastewater has not been reported yet.

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  • Method and application of preparing high-level oxidation catalyst through cobalt ore smelting slag

Examples

Experimental program
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Effect test

Embodiment 1

[0032] At 25°C, take 20g of 200-mesh cobalt ore smelting slag, stir in 100ml of 0.01mol / L hydrochloric acid solution for 1h, filter, and collect the filter cake. Disperse the filter cake with 50ml of distilled water, slowly add 1mol / L sodium hydroxide solution dropwise, and react for 0.5h when the pH=9; then continue to dropwise add sodium hydroxide solution to adjust the pH of the reaction solution to 13, and react for 2h at room temperature ; After the reaction solution was left to age for 6h, the filter material was collected and washed with water until neutral. The filter material was dried in a vacuum oven at 60° C. for 6 hours, and ground to obtain a yellow-brown powder.

[0033] Add 3 g of the catalyst prepared in this example and 4 g of the oxidizing agent potassium monoperoxohydrogensulfate into 100 ml of cobalt concentrate smelting wastewater (COD is 700 mg / L, pH = 8-9), and stir magnetically at 50 ° C for 12 h , the treatment liquid was tested, and the COD removal ...

Embodiment 2

[0035] At 25°C, take 20 g of 350-mesh cobalt ore smelting slag, stir in 20 ml of 0.1 mol / L sulfuric acid solution for 1 hour, filter, and collect the filter cake. Disperse the filter cake with 50ml of distilled water, slowly add 1mol / L sodium hydroxide solution dropwise, and react for 1h when the pH=9; then continue to dropwise add sodium hydroxide solution to adjust the pH of the reaction solution to 13, and react for 6h at room temperature; After the reaction solution was left to age for 20 h, the solid phase was collected and washed with water until neutral. The slag was simply dried and placed in a vacuum dryer, dried at 60° C. for 4 hours, and then ground to obtain a brown-yellow powder.

[0036] Add 3 g of the catalyst prepared in this example and 4 g of the oxidizing agent potassium monoperoxohydrogensulfate into 100 ml of cobalt concentrate smelting wastewater (adjust the pH of the water sample to 3 with 1M sulfuric acid in advance), and stir magnetically at 50°C for 1...

Embodiment 3

[0038] At 25°C, take 20 g of 350-mesh cobalt ore smelting slag, stir in 100 ml of 0.01 mol / L sulfuric acid solution for 4 hours, filter, and collect the filter cake. Disperse the filter cake with 100ml of distilled water, then slowly add 1mol / L sodium hydroxide solution dropwise, when the pH=9, react for 1h; then continue to dropwise add sodium hydroxide solution to adjust the pH of the reaction solution to 13, and react for 4h at room temperature ; After the reaction solution was left to age for 6h, the solid phase was collected and washed with water until neutral. The slag was simply dried and then placed in a muffle furnace, heated to 500°C at a rate of 10°C / min, calcined for 4 hours, and ground to obtain a brown-red powder.

[0039] Add 3 g of the catalyst prepared in this example and 4 g of the oxidizing agent potassium monoperoxohydrogensulfate into 100 ml of cobalt concentrate smelting wastewater (adjust the pH of the water sample to 3 with 1M sulfuric acid in advance),...

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Abstract

The invention discloses a method of preparing a high-level oxidation catalyst based on sulfate radial by utilizing solid waste cobalt ore smelting slag as a raw material, and pickling, modifying and activating the raw material. In the catalysts, the silicon dioxide skeleton in the slag is used as a carrier, and such ions or compounds as cobalt and ferrum are fixedly carried on the granule surfaces through pickling and coprecipitation methods, so that the smelting slag has such characteristics as high-level oxidation, multi-metal concerted catalysis and heterogeneous catalysis, and the like, and a non-homogeneous phase catalyst system formed by the smelting slag enables the smelting slag to be easily separated from a water body. When being applied on industrial sewage treatment, the catalytic oxidation system not only has high catalytic oxidation efficiency, wide pH adaptation range, low metal ion loss quantity and easy separation with water body, but also recycles the cobalt ore slag solid waste to change the waste into valuable, thereby both meeting the sustainable development and the nation call of the energy conservation and emission reduction, and having low cost and is easy to generalize, so that the method in the invention has brilliant application prospect.

Description

technical field [0001] The invention belongs to the technical field of solid waste recycling, and in particular relates to a method for preparing an advanced oxidation catalyst from cobalt ore smelting slag and its application in industrial wastewater treatment. Background technique [0002] Cobalt is a high-temperature-resistant material. Cobalt products are widely used in alloys, batteries and other production fields. They are also used in the manufacture of colored glass, pigments, catalysts and desiccants. On the other hand, cobalt alloys are extremely important strategic materials. It can be used to manufacture gas engines, jet engines, rocket engine nozzles, missiles and spacecraft components, etc. Therefore, cobalt is an indispensable and important raw material for national economy and national defense construction. [0003] With the rapid growth of my country's industrial economy, the demand for cobalt consumption is increasing rapidly. However, my country's cobalt r...

Claims

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Application Information

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IPC IPC(8): B01J23/75C02F1/72C02F1/76C02F103/10
Inventor 黄梅张敏东花俊峰陈圣福
Owner ZHEJIANG UNIV
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