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Ozone oxidation catalysis catalyst for degrading organic wastewater and preparing method thereof

A technology of ozone catalytic oxidation and organic wastewater, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve high cost, high ozone concentration, and can not reach the national Issues such as the first-class A standard for sewage discharge, to achieve the effect of reducing internal diffusion resistance

Inactive Publication Date: 2019-08-13
ZHEJIANG CATHAYRIPE ENVIRONMENTAL ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Treat reverse osmosis concentrated water with COD 300mg / L and TDS 18800mg / L with catalysts whose active ingredients are manganese oxide and tin tetrachloride, the dosage of ozone is 200mg / L, and the effluent COD is 150mg / L, which cannot meet the national sewage discharge level A Standard, and the ozone concentration is high, the cost is high
[0009] At present, there is no ozone catalytic oxidation catalyst that can efficiently degrade high-chlorinated organic wastewater on the market

Method used

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  • Ozone oxidation catalysis catalyst for degrading organic wastewater and preparing method thereof
  • Ozone oxidation catalysis catalyst for degrading organic wastewater and preparing method thereof
  • Ozone oxidation catalysis catalyst for degrading organic wastewater and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0110] Example 1 Carrier pretreatment

[0111] Take γ-Al 2 O 3 Particles, soak them in deionized water, and oscillate in an ultrasonic oscillator for at least 20 minutes (usually

[0112] 20-30min), clean to remove dust and impurities on the surface of the carrier; then take out the carrier and put it in an oven for drying treatment. During the drying process, control the drying temperature to be ≥100°C (usually 110±10°C). Dry for at least 4h under the condition of temperature ≥100℃, and dry to constant weight to prepare the pretreated carrier for use.

Embodiment 2

[0113] Example 2 Determination of carrier water absorption

[0114] Weigh the pretreated carrier γ-Al 2 O 3 50g (m, accurate to 0.01g) of particles and placed in a beaker, then add deionized water to the beaker and immerse γ-Al 2 O 3 Granules, stirring for at least 1h (usually 1h) Carrier γ-Al 2 O 3 The particles fully absorb the deionized water; then filter, separate the water from the carrier, and weigh the carrier after absorbing moisture (76g, ml); finally calculate the water absorption rate (Y, %) of the carrier according to formula (1).

[0115] Y(%)=(m 1 -m) / m×100% (1)

[0116] Take the arithmetic mean of the parallel determination results as the determination result, and the absolute value of the error of the two parallel determination results shall not exceed 1%.

[0117] The carrier γ-Al in the specific embodiment of the invention is calculated 2 O 3 The water absorption rate of the particles is 52%, that is, per 100g carrier (γ-Al 2 O 3 ) The amount of water completely absor...

Embodiment 3

[0118] Example 3 Preparation of catalyst (dual catalytically active components)

[0119] 1. Accurately weigh 350g of the catalytic pretreatment carrier γ-Al prepared in Example 1 2 O 3 ,spare.

[0120] 2. The water absorption rate Y of the carrier measured according to Example 2 is 52%, which is converted according to the volume of 1g water per 1ml. Therefore, the water absorption rate of the carrier is 52ml per 100g catalyst carrier, so 350g catalyst The volume of the solution in which the pretreatment carrier is immersed and weighed in an equal volume is 350×52 / 100=182ml.

[0121] 3. Prepare dipping liquid

[0122] Add copper nitrate (29.53g) and ferric nitrate (24.6g) to a small amount of deionized water, stir, and then add deionized water after dissolving until the total volume of the mixed solution is 182ml to make an impregnation solution, namely copper nitrate-iron Solution (182ml), spare, in which the mass of copper nitrate in the immersion solution converted into copper oxid...

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Abstract

The invention discloses a preparing method of an ozone oxidation catalysis catalyst for degrading organic wastewater. The catalyst is a multi-component-loaded catalyst and comprises a catalysis carrier and catalytic active components, wherein the catalytic active components are multi-component metal oxides. The catalyst has high catalysis efficiency and stability in the process of ozone catalysistreatment on the high-chlorine organic wastewater, the active components of the catalyst have a good synergistic effect, the advanced treatment efficiency for the high-chlorine organic wastewater is improved, and meanwhile, the compressive strength of the catalyst is high; after the high-chlorine organic wastewater with the COD of 70-120 mg / L and the chlorine ion content not larger than 8,000 mg / Lis subjected to catalytic treatment, the COD content can reach the national grade-one sewage discharge standard; meanwhile, the preparing method of the catalyst is simple, the load quantity of the active components is precisely controlled, the active components are uniformly dispersed, no waste slags or wastewater is generated in the preparing process, and the preparing method is free of pollution and environmentally friendly.

Description

Technical field [0001] The invention relates to a multi-component supported catalyst for degrading high-chlorine organic wastewater, belonging to the field of water treatment and environmental catalysis. Background technique [0002] In recent years, with the rapid development of my country’s industry, wastewater pollution has become more and more serious. Water pollution has become organic, toxic and harmful. The types and quantities of organic pollutants in water are increasing. Organic matter in water directly affects the ecological environment and human life and health. The pollution problem has also become an important problem to be solved urgently. The salty wastewater includes the sewage of the circulating water system, the drainage of the desalinated water system, and the concentrated brine discharged from the reverse osmosis of the reuse system. TDS (total dissolved solids) is higher in concentrated brine (TDS> 4000mg / L), especially high-chlorine organic wastewater (C...

Claims

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Application Information

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IPC IPC(8): B01J23/745B01J23/889B01J23/755B01J23/83C02F1/78C02F1/72C02F101/36
CPCB01J23/002B01J23/745B01J23/8892B01J23/755B01J23/83C02F1/78C02F1/725C02F2101/36B01J2523/00
Inventor 王凯李光辉
Owner ZHEJIANG CATHAYRIPE ENVIRONMENTAL ENG
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