Copper base catalyst for catalyzing wet oxidation method treating industrial waste water

A copper-based catalyst, industrial wastewater technology, applied in oxidation water/sewage treatment, metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, etc., can solve problems such as unreachable

Inactive Publication Date: 2002-07-17
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The loss concentration of copper ions is around 20mg/l. Although it has been greatly improved compared

Method used

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  • Copper base catalyst for catalyzing wet oxidation method treating industrial waste water
  • Copper base catalyst for catalyzing wet oxidation method treating industrial waste water
  • Copper base catalyst for catalyzing wet oxidation method treating industrial waste water

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0027] Example 1: Preparation of catalyst (I)

[0028] Take 550ml Na with a concentration of 1.0mol / L 2 CO 3 The solution is placed in a water bath with a water bath temperature of 70°C and heated for 20 minutes. Take 1.0mol / L Cu(NO 3 ) 2 Solution 100ml, 1.0mol / L Zn(NO 3 ) 2 110ml solution, take 0.5mol / L AL 2 (NO 3 ) 3 75ml of the solution, transfer to a beaker, mix evenly, slowly drip with a separatory funnel until it is filled with Na 2 CO 3 The solution is in the beaker while stirring quickly. After the titration, ensure that the pH of the mother liquor is ≥9, and let the precipitate and the mother liquor age together for a whole day and night.

[0029]After aging, vacuum filtration is used to separate the precipitate and mother liquor, and deionized water is used to wash four times under vacuum filtration to remove impurity ions. The precipitate is extruded into a Φ3 strip, dried in the air, and then dried at 110°C for 2 hours to obtain a dried precipitate for use. Its XDR spe...

Example Embodiment

[0031] Example 2: Preparation of catalyst (II)

[0032] Take 560ml Na with a concentration of 1.0mol / L 2 CO 3 The solution replaces the 550ml Na in Example 1 2 CO 3 Outside the solution, and weigh La 2 (NO 3 ) 3 .nH 2 O crystal 1.0g, Ce(NO 3 ) 3 ·6H 2 1.14 g of O crystals were dissolved in the mixed salt solution, other conditions were the same as in Example 1, and catalyst B was prepared.

Example Embodiment

[0033] Example 3: Preparation of catalyst (III)

[0034] Take 700ml Na with a concentration of 1.0mol / L 2 CO 3 The solution replaces the 550ml Na in Example 1 2 CO 3 Solution, take 1.0mol / L Mg(NO 3 ) 2 130ml solution instead of 1.0mol / L Zn(NO 3 ) 2 110ml solution, take 0.5mol / L Cr 2 (NO 3 ) 3 120ml solution instead of 0.5mol / L Al 2 (NO 3 ) 3 The solution is 75ml, the calcination temperature is 600°C and the treatment time is 10 hours, and other conditions are the same as in Example 1, and catalyst C can be prepared.

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Abstract

The main componens of copper base catalyst are copper, zinc, nickel, magnesium, aluminium, chromium, iron and partial oxide of rare earth metal, in which (by oxide content) CuO is 20-55%, ZnO, NiO or MgO is 20-55%, Cr2O3, Al2O3 of Fe2O3 is 10-40% and rare earth metal oxide is 0-10%. Said catalyst can be made up by roasting catalyst precursor with hydrotalcite-like structure obtained by coprecipitation of salts of various metals. Said catalyst can effectively treat industrial organic waste water containing phenol, sulfosalicylic acid, H-acid and surfactant, etc., not only possesses higher catalytic activity, but also can control the loss of active components.

Description

technical field [0001] The invention relates to a copper-based catalyst used in catalytic wet oxidation treatment of industrial waste water and a preparation method thereof. The main components of the catalyst are oxides of copper, zinc, nickel, magnesium, aluminum, chromium, iron and some rare earth metals. This catalyst not only has high catalytic activity, but also the loss of active components is controlled, and the loss of copper ions is reduced by more than one order of magnitude compared with the previous literature. Background technique [0002] Wet catalytic oxidation (Catalytic Wet Air Oxidation, referred to as CWAO) uses molecular oxygen (air or pure oxygen), under the action of high temperature, high pressure and catalyst, to deeply oxidize organic matter in wastewater under liquid phase conditions, and finally convert it into CO 2 and water, organic nitrogen is converted to N 2 ; Organic phosphorus and organic sulfur are converted into corresponding PO 4 3- ...

Claims

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Application Information

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IPC IPC(8): B01J23/72B01J23/76C02F1/24C02F1/74
Inventor 孙承林窦和瑞陈拥军吴鸣
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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