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Catalyst used for ozone catalyzing and oxidizing treatment of hard-to-degrade waste and preparation method and application thereof

A catalyst and catalyst carrier technology, applied in catalyst activation/preparation, oxidized water/sewage treatment, metal/metal oxide/metal hydroxide catalyst, etc., can solve the restriction on the promotion and utilization of ozone catalytic oxidation technology and product recycling Difficulties, cumbersome preparation methods, etc., to achieve the effects of improving the reaction rate and the utilization rate of ozone, easy large-scale preparation, and simple preparation process

Active Publication Date: 2019-04-19
渤海水业股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although it solves the problem of high cost of preparation of precious metals, it still has problems such as the difficulty of recycling and reusing the product at the micron level, and the preparation method is cumbersome.
[0004] Most commercially available granular catalysts have the problems of low catalytic activity, low ozone utilization rate, and complicated preparation process, which restrict the popularization and utilization of ozone catalytic oxidation technology.

Method used

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  • Catalyst used for ozone catalyzing and oxidizing treatment of hard-to-degrade waste and preparation method and application thereof
  • Catalyst used for ozone catalyzing and oxidizing treatment of hard-to-degrade waste and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example

[0061] (1) Put 100g of catalyst carrier-activated alumina pellets into 0.01mol / L NaOH solution to wash for 5 minutes, then wash with pure water until neutral, and dry at 100°C for later use;

[0062] (2) Preparation of precursor solution:

[0063] The active components of the catalyst (based on the total weight of metal elements Fe, Mn and Cu) account for 8% of the total weight of the catalyst.

[0064] Weigh 28.86g ferric nitrate nonahydrate, 8.91g manganese acetate tetrahydrate, and 7.55g copper nitrate trihydrate and dissolve them in 150ml water, put the catalyst carrier prepared in step (1) into it, add NaOH to adjust the pH of the impregnation solution to 6.0, then put the carrier pellets and impregnation solution into the Erlenmeyer flask and then put it in the shaker, impregnate at 50°C for 20h, and rotate at 100rpm;

[0065] (3) After soaking, put the precursor solution and carrier pellets together into the reactor for hydrothermal reaction, the reaction condition is ...

Embodiment 2

[0074] Preparation examples of heterogeneous ozone catalysts for ozone catalytic oxidation treatment of refractory wastewater:

[0075] (1) Put 100g of catalyst carrier-activated alumina pellets into 0.01mol / L NaOH solution to wash for 3 minutes, then wash with pure water until neutral, and dry at 120°C for later use;

[0076] (2) Preparation of precursor solution:

[0077] The active components of the catalyst (based on the total weight of metal elements Fe, Mn and Cu) account for 15% of the total weight of the catalyst.

[0078] Take by weighing 43.28g ferric nitrate nonahydrate, 13.37g manganese acetate tetrahydrate, 22.65g copper nitrate trihydrate and dissolve in 150ml water, put the catalyst carrier prepared in step (1) into it, add Na 2 CO 3 Adjust the pH of the impregnating solution to 5.5, then put the carrier pellets and the impregnating solution in a shaker, and impregnate at 50°C for 8 hours at a speed of 150rpm;

[0079] (3) After soaking, put the precursor sol...

Embodiment 3

[0088] In addition to adjusting the amount of raw materials added, the catalyst active component (based on the total weight of metal elements Fe, Mn and Cu) accounts for 10% of the total weight of the catalyst, and n(Fe):n(Mn):n(Cu) is 2:1 : 1, other methods and conditions are identical with embodiment 1.

[0089] Catalyst catalytic activity test

[0090] The salt chemical tail water with COD about 95mg / L, pH 6.87, and salt content about 1058μs / cm was used as the experimental object. Carry out the small-scale experiment of dynamic continuous operation of ozone catalytic oxidation, add the catalyst of Example 3 into the catalytic oxidation reaction column 1, and add a commercially available catalyst into the catalytic oxidation reaction column 2. The reaction conditions of the two reaction columns are the same.

[0091] At room temperature, after running continuously for 3 hours, take the effluent from each reaction column to measure the chemical oxygen demand (COD) according...

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Abstract

The invention relates to the field of hard-to-degrade waste water treatment, provides a catalyst and a preparation method and application thereof, and particularly relates to a heterogenous catalyst used for the ozone catalyzing and oxidizing treatment of hard-to-degrade waste and a preparation method and application thereof. According to the catalyst, active aluminum oxide is taken as a carrier,transition metal is loaded on the carrier by adopting an impregnation-hydrothermal method, and the catalyst is obtained after drying and sintering. The catalyst has the advantages that a large numberof hydroxyl radicals can be generated when the catalyst is used for degrading the hard-to-degrade waste water to oxidize hard-to-degrade organic matters, and the catalyst is an efficient heterogenouscatalyst with higher catalytic activity, simple preparation technology and low cost.

Description

technical field [0001] The invention relates to the field of refractory wastewater treatment, and relates to a catalyst, its preparation method and application, in particular to a heterogeneous catalyst for ozone catalytic oxidation treatment of degraded wastewater, its preparation method and application. Background technique [0002] Whether it is advanced treatment of industrial wastewater or domestic sewage treatment, efficient and feasible treatment technologies are required for standard upgrading. At present, most of the research is mainly focused on advanced oxidation technology, among which ozone catalytic oxidation technology uses ozone to generate highly oxidizing hydroxyl radicals, which can efficiently degrade organic pollutants, with fast reaction rate, no selectivity, and no secondary pollution , to achieve zero discharge of sewage, is the current research hotspot. [0003] The key to ozone catalytic oxidation technology is the preparation of efficient and chea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889B01J37/02B01J37/10B01J35/10C02F1/78C02F1/72C02F101/30
CPCC02F1/725C02F1/78B01J23/8892B01J37/0201B01J37/10C02F2101/30B01J35/615
Inventor 胡清李浩然胡滨郭兆然张倩葛立福赵洪军索小棽马林
Owner 渤海水业股份有限公司
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