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Wet oxidation catalyst and preparation method thereof

A wet oxidation and catalyst technology, used in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve problems such as low COD removal efficiency and reduce organic matter content. , the effect of good technical effect

Active Publication Date: 2015-11-25
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] One of the technical problems to be solved by the present invention is the low efficiency of COD removal by wet oxidation catalysts in the prior art, and a new wet oxidation catalyst is provided, which has the advantage of high COD removal efficiency

Method used

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  • Wet oxidation catalyst and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1. Catalyst preparation

[0031] In terms of weight ratio, TiO 2 :CeO 2 :Ru is 98.8:0.8:0.4. The preparation method of catalyst is: 1) preparation of carrier: 240g nano TiO 2 Powder, 1.95g nanometer CeO 2 Powder, 80g of water and 4g of carboxymethyl cellulose were mixed and kneaded for 2 hours, and extruded. After the molded product was dried at room temperature, it was calcined at 700°C for 2 hours; 2) loaded precious metal: 199.0g molded carrier was impregnated at room temperature with 2.16g RuCl hydrate 3 overnight, dried at 80°C, and then reduced for 4 hours in a hydrogen atmosphere (hydrogen-nitrogen mixture with a hydrogen content of 4%) at 400°C to obtain a noble metal-supported catalyst W-01. The formulation of the catalyst is shown in Table 1.

[0032] 2. Catalyst evaluation

[0033] Using industrial acrylic acid wastewater as raw material, the COD value of the wastewater is 63,800mg / L. Wastewater is mixed with oxygen and passed through a 125mL fixed-be...

Embodiment 2

[0035] 1. Catalyst preparation

[0036] In terms of weight ratio, TiO 2 :Nd 2 o 3 :Ru is 98.4:1.2:0.4. The preparation method of catalyst is: 1) preparation of carrier: 240g nano TiO 2 Powder, 2.90g nanometer Nd 2 o 3 Powder, 80g of water and 4g of carboxymethyl cellulose were mixed and kneaded for 2 hours, and extruded. After the molded product was dried at room temperature, it was calcined at 700°C for 2 hours; 2) loaded precious metal: 199.0g molded carrier was impregnated at room temperature with 2.16g RuCl hydrate 3 in the aqueous solution overnight, dried at 80°C, and then reduced for 4 hours under a hydrogen atmosphere (hydrogen-nitrogen mixture with a hydrogen content of 4%) at 400°C to obtain a noble metal-supported catalyst W-02. The formulation of the catalyst is shown in Table 1.

[0037] 2. Catalyst evaluation

[0038] Using industrial acrylic acid wastewater as raw material, the COD value of the wastewater is 63,800mg / L. Wastewater is mixed with oxygen ...

Embodiment 3

[0040] 1. Catalyst preparation

[0041]In terms of weight ratio, TiO 2 :CeO 2 :Nd 2 o 3 :Ru is 98.4:0.4:0.8:0.4. The preparation method of catalyst is: 1) preparation of carrier: 240g nano TiO 2 Powder, 0.98gCeO 2 Powder, 1.92g nanometer Nd 2 o 3 Powder, 80g of water and 4g of carboxymethyl cellulose were mixed and kneaded for 2 hours, and extruded. After the molded product was dried at room temperature, it was calcined at 700°C for 2 hours; 2) loaded precious metal: 199.0g molded carrier was impregnated at room temperature with 2.16g RuCl hydrate 3 overnight, dried at 80°C, and then reduced for 4 hours in a hydrogen atmosphere (hydrogen-nitrogen mixture with a hydrogen content of 4%) at 400°C to obtain a noble metal-supported catalyst W-03. The formulation of the catalyst is shown in Table 1.

[0042] 2. Catalyst evaluation

[0043] Using industrial acrylic acid wastewater as raw material, the COD value of the wastewater is 63,800mg / L. Wastewater is mixed with oxy...

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Abstract

The present invention relates to a preparation method of a wet oxidation catalyst, and a wet oxidation treatment method of industrial acrylic acid wastewater, and aims to solve the problem of low wastewater COD reduction efficiency of a catalyst in the prior art. The wet oxidation catalyst adopts a rare earth doped noble metal catalyst, and comprises the following components: (1) 96 to 99.8 parts of a carrier; (2) 0.1 to 2 parts of a rare earth oxide; and ( 3) 0.1 to 2 parts of at least one noble metal selected from the platinum group, by the technology scheme, the problem is better solved, and the wet oxidation catalyst is used for treatment of industrial acrylic acid wastewater.

Description

technical field [0001] The invention relates to a wet oxidation catalyst, a preparation method thereof, and a wet oxidation treatment method for industrial acrylic acid wastewater. technical background [0002] Acrylic acid and its esters are important organic chemical raw materials. As polymerized monomers, they can be homopolymerized or copolymerized into tens of thousands of polymers. , rubber and plastic processing and other fields have been widely used. At present, the direct oxidation process of propylene is generally used to produce acrylic acid. High-concentration organic wastewater is produced during the production of acrylic acid, and the wastewater mainly contains organic substances such as acetic acid, acrylic acid, formaldehyde and toluene. According to different processes, the wastewater chemical oxygen demand (COD cr ) can be as high as 30,000-65,000 mg / L, which is strongly acidic and difficult to handle. The incineration method is a commonly used method f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/63C02F1/72C02F1/74C02F101/34
Inventor 陈航宁郭宗英郑育元汪国军吴粮华
Owner CHINA PETROLEUM & CHEM CORP
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