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A preparation method of catalyst crystal and its application in catalytic degradation of organic wastewater

A catalyst and crystal technology, applied in the field of catalytic degradation of 2,4-dichlorophenol, can solve the problems of high catalyst cost and low catalytic efficiency, and achieve the effects of simple preparation process, high catalytic activity and simple activation process

Active Publication Date: 2018-09-14
天津绿诺环保科技有限公司
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Problems solved by technology

[0006] The purpose of the present invention overcomes the shortcomings of low catalytic efficiency and high catalyst cost in the catalytic degradation of 2,4-dichlorophenol in the prior art, and provides a method for preparing a catalyst crystal, which is used to catalyze the degradation of 2,4-dichlorophenol; In the present invention, ammonium paramolybdate is used as molybdenum source, melamine is used as nitrogen source, ferric thiocyanate is used as sulfur source and iron source to modify titanium dioxide, and brown catalyst crystals are prepared through in-situ reaction, which has a relatively high specific surface area. and catalytic activity

Method used

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  • A preparation method of catalyst crystal and its application in catalytic degradation of organic wastewater
  • A preparation method of catalyst crystal and its application in catalytic degradation of organic wastewater

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Embodiment 1

[0024] 1. Preparation of catalyst crystals:

[0025] 1) Preparation of ammonium molybdate modified titanium dioxide sol: drop 50ml of tetraisopropyl titanate into 200ml of absolute ethanol at 40°C and stir for reaction. Then lower the temperature to 40° C., add ammonium paramolybdate and stir for 2 hours, then add 10 ml of ethanol solution of hydrochloric acid with a concentration of 1 mol / L, stir at room temperature for 2 hours, and then let it stand for 3 days to obtain ammonium molybdate modified titanium dioxide sol;

[0026] 2) Dissolve 20g of melamine and 10ml of 37wt% formaldehyde aqueous solution in 100ml of water and react at 50°C, then add dropwise sodium hydroxide aqueous solution to adjust the pH to 9.2-9.5, and stir for 1 hour; after the reaction, add dropwise hydrochloric acid to the system to adjust the system pH to 5.5-5.8, then dropwise add 1 mol / L ferric thiocyanate aqueous solution to react at 60°C for 22 hours; distill off the solvent, dry at 100°C for 24 h...

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Abstract

The invention belongs to the technical field of organic catalysis, and specifically relates to a preparation method of catalyst crystal and its use in catalytic degradation of organic wastewater, especially the catalytic degradation of 2,4-dichlorophenol. The present invention uses ammonium paramolybdate as the molybdenum source, melamine as the nitrogen source, iron thiocyanide as the sulfur source and iron source to modify titanium dioxide, and prepares brown catalyst crystals through in-situ reaction, which has a high specific surface area. And catalytic activity, the degradation rate of 2,4-dichlorophenol is as high as over 99%.

Description

technical field [0001] The invention belongs to the technical field of organic catalysis, and in particular relates to a preparation method of a catalyst crystal and its application in catalytic degradation of organic wastewater, in particular to catalytic degradation of 2,4-dichlorophenol. Background technique [0002] 2,4-dichlorophenol (2,4-dichlorophenol) is an important organic intermediate, mainly used in chemical industry, insecticide, preservative and paper industry. It has a foul smell and a high degree of toxicity. It is an environmental hormone and can accumulate in animals through the food chain. These pollutants are some organic substances that are difficult to be biodegraded. They not only hinder the growth and reproduction of aquatic organisms, but are also harmful to human health. Toxic pollutants on blacklist. Therefore, it is of great practical significance to control and remove low-concentration and highly toxic pollutants in the environment. Photocatal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24B01J35/10B01J38/60B01J38/02C02F1/32C02F101/34C02F101/36
CPCC02F1/32B01J27/24B01J38/02B01J38/60C02F2305/10C02F2101/345C02F2101/36B01J35/61B01J35/39
Inventor 赵兴亚杨志远于法鹏杨冰雪马庆宇
Owner 天津绿诺环保科技有限公司
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