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Catalytic wet oxidation catalyst for wastewater and preparation method thereof

A wet oxidation and catalyst technology, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalyst, metal/metal oxide/metal hydroxide catalyst, etc., can solve biological bacteria poisoning and complicated process flow, and low COD removal rate Advanced problems, to achieve low residual cyanide, reduce toxicity, and simple process

Active Publication Date: 2011-05-04
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] One of the technical problems to be solved by the present invention is that in the prior art, the COD removal rate in the treatment of sulfur-containing wastewater is not high, the problems of biological bacterial poisoning and complex process flow, or the problems of only treating cyanide and not in the treatment of cyanide-containing wastewater. To deal with the problems of other organic matter and secondary pollution in wastewater, and provide a new catalytic wet oxidation treatment catalyst for wastewater. When the catalyst is used to treat sulfur-containing wastewater, it has high COD removal rate, no biological bacterial poisoning problem and simple process flow Advantages; when used to treat cyanide-containing wastewater, it has the advantage of simultaneously removing cyanide and other organic pollutants without causing secondary pollution

Method used

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  • Catalytic wet oxidation catalyst for wastewater and preparation method thereof
  • Catalytic wet oxidation catalyst for wastewater and preparation method thereof
  • Catalytic wet oxidation catalyst for wastewater and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 2 g Bi(NO 3 ) 3 ·5H 2 O was dissolved in 30ml water to make solution I, and 98 grams of 20-80 mesh TiO 2 Carrier impregnation solution I, dried at 100°C for 12 hours, and calcined at 600°C for 5 hours to obtain catalyst precursor I; 1.5 g of anhydrous RuCl 3 Dissolved in 30ml of water to form solution II, impregnated solution II with the prepared catalyst precursor I, dried at 80°C for 24 hours, and calcined at 700°C for 4 hours to obtain a catalyst.

[0022] Using the catalyst prepared above to treat Na 2 Wastewater with sulfur content of 45g / l in S form and COD of 100,000mg / l, in a fixed bed reactor, at a reaction temperature of 260°C, a reaction pressure of 7.0Mpa, and a liquid space velocity of 2.0 hours -1 , Under the condition that the volume ratio of oxygen and waste water is 150:1 under the standard state, the COD removal rate is 97.5%, and the sulfur in the sulfate ion of the waste water after the reaction is 45g / l.

[0023] Utilize the catalyst prepared a...

Embodiment 2～17

[0025] The catalyst preparation method is the same as in Example 1, only the raw materials, component ratios and preparation conditions are changed. The prepared catalyst is shown in Table 1, and the reaction results for treating sulfur-containing wastewater are shown in Table 2. The results for cyanide-containing wastewater are shown in Table 3

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Abstract

The invention relates to a catalytic wet oxidation catalyst for wastewater and a preparation method thereof, which mainly solve the problems of biological inhibition, low COD removing rate and complex process during treatment of sulfur-containing wastewater or problems that other organic pollutants in the wastewater and secondary pollution cannot be handled during treatment of cyanide-containing wastewater. The catalytic wet oxidation catalyst for wastewater comprises the following components in parts by weight: 90-99.9 parts of at least one oxide carrier selected from TiO2, Al2O3, SiO2 or ZrO2, 0.1-10 parts of at least one metal or oxide selected from Pt, Pd, Ru, Ir or Rh carried thereon and 0.01-5 parts of at least one oxide selected from Bi, Ba, Mg, B, V, Mo or rare earth. By the technical scheme using the catalytic wet oxidation catalyst for wastewater, the invention solves the problem better and can be used in industrial treatment of industrial organic wastewater.

Description

technical field [0001] The invention relates to a catalytic wet oxidation catalyst for waste water and a preparation method thereof. Background technique [0002] For wastewater containing organic pollutants, biochemical treatment is a simple and economical method, but if the wastewater contains toxic and harmful substances to biological bacteria, it is difficult to directly treat it with biochemical treatment. Excessive sulfides in wastewater can strongly inhibit anaerobic processes. The anti-sulfurization process of reducing sulfate to sulfide competes with the methanogenic process for the hydrogen removed from organic non-oxidation, and soluble sulfide will directly inhibit the function of bacterial cells, reducing the population of methanogenic bacteria. When the sulfur content exceeds When the concentration is 200mg / L, the inhibitory effect is very obvious, so that the organic pollutants in the wastewater cannot be effectively removed by biological methods. Wet oxidat...

Claims

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Application Information

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IPC IPC(8): B01J23/644B01J23/652B01J23/44B01J23/46B01J23/63B01J23/42B01J23/648B01J37/025C02F1/72
Inventor 汪国军宋卫林姚全明奚美珍
Owner CHINA PETROLEUM & CHEM CORP
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