Catalyst for treating organic wastewater and preparation method thereof

An organic waste water and catalyst technology, applied in physical/chemical process catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of less than 80% activity and loss of active components, etc. Achieve the effect of improving catalytic performance, increasing contact area, and improving the ability to reduce COD in wastewater

Inactive Publication Date: 2020-08-11
YUNNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalyst can effectively treat toxic and difficult-to-degrade industrial organic wastewater containing phenol, sulfosalicylic acid, H-acid, and surfactants. It not only has high catalytic activity, but also control

Method used

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  • Catalyst for treating organic wastewater and preparation method thereof
  • Catalyst for treating organic wastewater and preparation method thereof
  • Catalyst for treating organic wastewater and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0043] (1) Preparation of raw materials: including nitrate solution and alkali solution,

[0044] Nitrate solution: Different types of cations can be selected in different embodiments, and water is added to prepare a nitrate mixed solution with a cation weight of 1 mol,

[0045] Alkali solution: mix 3.5mol / L NaOH solution and 0.25mol / L Na 2 CO 3 Aqueous solution mixing;

[0046] (2) Mixed precipitation: Add alkali solution and nitrate solution to 70°C ionized water in a volume ratio of 1:1 to form hydrotalcite precipitation, stirring continuously until no more precipitation occurs;

[0047] (3) Aging: the hydrotalcite prepared in step (2) is aged in a water bath at 80°C for 4 hours;

[0048] (4) Suction filtration: Use deionized water to continuously wash and filter the aged hydrotalcite in step (3) until the filtered filtrate is neutral;

[0049] (5) Drying: drying the hydrotalcite obtained in step (4) to obtain a finished hydrotalcite.

[0050] A preparation method of a catalyst for tre...

Embodiment 5

[0064] Example 5 Cu 2+ The dissolution of ions is 37.5% lower than that of Example 2. Zn 2+ The dissolution of ions is reduced by 95.5%, Fe 3+ The dissolution of ions was reduced by 84.5%.

Embodiment 4

[0065] Example 4 has little effect on reducing metal elution, and the activity is basically unchanged. The removal rate of COD in simulated phenol wastewater with COD 20000mg / L is 91.5%.

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Abstract

The invention discloses a catalyst for treating organic wastewater and a preparation method of the catalyst, which relate to the field of organic wastewater treatment. The preparation method comprisesthe following steps that 1, adding a carrier into a hydrotalcite-like aqueous solution, and performing continuous stirring for loading; 2, carrying out water bath aging on the loaded hydrotalcite-like compound obtained in step 1 to obtain a primary catalyst; 3, carrying out suction filtration on a primary catalyst obtained in the step 2 by using deionized water until a filtrate is neutral to obtain a secondary catalyst; and 4, drying a secondary catalyst obtained in the step 3 to obtain the finished catalyst. According to the invention, a hydrotalcite-like compound catalyst is prepared from hydrotalcite-like compound and a carrier by a coprecipitation method; the active ingredients in the hydrotalcite-like compound can be uniformly embedded in the structure of the hydrotalcite-like compound carrier, cannot be agglomerated, and cannot be covered, so that the contact area of the surface active substances of the hydrotalcite-like compound is increased, and the catalytic performance of the active ingredients of the catalyst is further improved to the maximum extent.

Description

Technical field [0001] The invention relates to the field of organic wastewater treatment, in particular to a catalyst for treating organic wastewater and a preparation method thereof. Background technique [0002] LDHs is a layered double hydroxy metal oxide, also known as layered anionic compound. LDHs is a compound hydrotalcite-like material assembled by a positively charged main board and interlayer anions through non-covalent bond interactions. The special composition structure includes the diversity of the main board chemical composition, the adjustable metal cation ratio and the interlayer The richness of anion species, the positively charged main board is mainly composed of divalent and trivalent metal cations. Common divalent metal cations mainly include Zn 2 + , Mg 2+ , Cu 2+ , Ca 2+ Etc., trivalent metal cations mainly include Al 3+ , Fe 3+ , Cr 3+ . The layered structure of hydrotalcite and the special composition structure of ionic hydrotalcite materials include th...

Claims

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Application Information

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IPC IPC(8): B01J23/80B01J23/83B01J23/889B01J23/89B01J23/887B01J23/847B01J35/10C02F1/72C02F101/34
CPCB01J23/80B01J23/83B01J23/8472B01J23/8873B01J23/8892B01J23/8953B01J35/0066B01J35/1004C02F1/725C02F2101/34C02F2101/345
Inventor 涂学炎刘建建
Owner YUNNAN UNIV
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