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Preparation method and application of a high-efficiency supported ozone oxidation catalyst

An ozone catalytic oxidation and catalyst technology, applied in the direction of physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problems of easy loss of active components, low content of active components, low catalytic activity, etc., and achieve degradation Good effect, improved ozone reaction speed, high catalytic activity

Active Publication Date: 2020-05-12
浙江巨能环境工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The above-mentioned ozone oxidation catalysts are all prepared by loading active components on the carrier, and the catalyst has a certain catalytic activity, but with an inert substance as the carrier material, the content of active components is small, and the catalytic activity is low; and the active components can only be loaded On the surface of the carrier, the active components are easy to lose during long-term use, resulting in catalyst deactivation

Method used

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  • Preparation method and application of a high-efficiency supported ozone oxidation catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0031] (1) Preparation of titanium sol solution: use titanium nitrate as the titanium source, dissolve it in ultrapure water at pH=1, 50°C, and prepare a titanium sol solution with a titanium salt concentration of 2mol / L, referred to as A solution;

[0032] (2) Preparation of template sol solution: CTAB is used as structure directing agent, ultrapure water at 50℃ is used as solvent, Ti 4+ : The CTAB molar ratio is 10:1, and the CTAB solution with the same volume as the titanium sol solution is prepared, which is the template sol solution, referred to as B solution;

[0033] (3) Preparation of mesoporous titanium dioxide molecular sieve precursor: slowly add liquid B to liquid A at a stirring speed of 100 rad / min, and react for 20 hours at 80°C to obtain a mesoporous titanium dioxide molecular sieve precursor mixture, which is centrifuged and washed Then the precursor of the mesoporous titanium dioxide molecular sieve is obtained, which is dried in an oven at 105°C for use;

[0034] (...

Embodiment 2

[0037] (1) Preparation of titanium sol solution: use titanium chloride as a titanium source, dissolve it in ultrapure water at pH=3, 50°C, and prepare a titanium sol solution with a titanium salt concentration of 1mol / L, referred to as A solution;

[0038] (2) Preparation of template sol solution: CTAB is used as structure directing agent, ultrapure water at 50℃ is used as solvent, Ti 4+ : The CTAB molar ratio is 15:1, and the CTAB solution with the same volume as the titanium sol solution is prepared, which is the template sol solution, referred to as B solution;

[0039] (3) Preparation of mesoporous titanium dioxide molecular sieve precursor: Add liquid B to liquid A slowly at a stirring speed of 150 rad / min, and react for 15 hours at 80°C to obtain a mesoporous titanium dioxide molecular sieve precursor mixture, which is centrifuged and washed. Then the precursor of the mesoporous titanium dioxide molecular sieve is obtained, which is dried in an oven at 105°C for use;

[0040] (...

Embodiment 3

[0043] (1) Preparation of titanium sol solution: use titanium sulfate as the titanium source, dissolve it in ultrapure water at pH=4, 40°C, and prepare a titanium sol solution with a titanium salt concentration of 0.5 mol / L, referred to as A solution;

[0044] (2) Preparation of template sol solution: CTAB is used as structure directing agent, 40℃ ultrapure water is used as solvent, Ti 4+ : The CTAB molar ratio is 5:1, and the CTAB solution with the same volume as the titanium sol solution is prepared, which is the template sol solution, referred to as B solution;

[0045] (3) Preparation of mesoporous titanium dioxide molecular sieve precursor: slowly add liquid B to liquid A at a stirring speed of 130rad / min, and react for 18 hours at 80°C to obtain a mesoporous titanium dioxide molecular sieve precursor mixture, which is centrifuged and washed Then the precursor of the mesoporous titanium dioxide molecular sieve is obtained, which is dried in an oven at 105°C for use;

[0046] (4)...

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Abstract

The invention belongs to the technical field of catalysts and especially relates to a preparation method for an efficient load type ozone oxidation catalyst. The preparation method for the efficient load type ozone oxidation catalyst provided by the invention comprises five processes of preparing a titanium sol solution, preparing a template agent sol solution, preparing a mesoporous titanium dioxide molecular sieve precursor, de-molding the mesoporous titanium dioxide molecular sieve precursor and loading a MnO2 active component. According to the invention, a self-prepared mesoporous titanium dioxide molecular sieve is used as a carrier, a Mn metallic oxide catalyst is loaded into an inner pore structure of a titanium molecular sieve, the molecular sieve is composed of active components, the content of the active components in the catalyst material is ultrahigh, the removal rate of the pollutants is high, the catalytic activity is high, the active component loss is less and the catalyst has an obvious catalytic effect in ozone oxidation treatment for antibiotic wastewater, such as, chloramphenicol wastewater, penicillin wastewater, erythrocin wastewater, streptomycin wastewater, vancomycin wastewater and pipemidic acid wastewater.

Description

Technical field [0001] The invention belongs to the technical field of catalysts, and particularly relates to a preparation method of an ozone oxidation catalyst. Background technique [0002] Antibiotic pollution is the most important one of the pollution of medicines and personal care products (PPCPs). Because antibiotics have the characteristics of wide pollution, difficult to degrade, high toxicity, and easy to deposit, and the traditional water treatment process has poor effect on the removal of antibiotics. Antibiotics may cause microbial resistance and pose a major threat to human health and ecosystems. Commonly used treatment technologies for antibiotic wastewater include incineration, micro-electrolysis, Fenton reagent method and other advanced oxidation technologies. Among them, the micro-electrolysis method uses iron-carbon to form tiny primary batteries, releasing new ecological Fe 2+ And [H] reacts with the components in the solution to achieve the purpose of removi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/03B01J35/10C02F1/78C02F101/36C02F101/34C02F101/38
CPCB01J29/0341B01J35/10B01J2229/186C02F1/725C02F1/78C02F2101/34C02F2101/36C02F2101/38
Inventor 凌明邹光耀李婷朱宏博郭慧
Owner 浙江巨能环境工程有限公司
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