Catalyst for inducing catalytic oxidation technique and preparation method thereof

An oxidation process and induced catalysis technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve the problem of easy loss of active components, poor mechanical strength of catalysts, The narrow application range of pH, etc., can achieve the effect of wide application range of pH, reducing dissolution rate and maintaining good effect.

Active Publication Date: 2008-05-28
NANJING UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of poor catalyst mechanical strength, narrow pH application range and easy loss of active components in the process of induced catalytic oxidation of ordinary catalytic oxidation catalysts, and to provide a catalyst that can overcome the above shortcomings and is used for induced catalytic oxidation. The catalyzer of oxidation process, another object of the present invention provides the preparation method of above-mentioned catalyzer

Method used

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  • Catalyst for inducing catalytic oxidation technique and preparation method thereof

Examples

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Effect test

Embodiment 1

[0028] The catalyst carrier is Al 2 o 3 , with a particle size of 3 mm, first cleaned with distilled water, soaked in 8% hydrochloric acid for 18 hours, then placed in a boiling water bath for 1 hour, then washed with distilled water until neutral, dried at 120°C, and then roasted at 400°C for 3 hours After activation, the catalyst carrier is obtained. Use the nitrate solution of iron and copper, the mass concentration is 5% and 8% respectively, impregnate the catalyst carrier for 18h and 24h respectively; dry the impregnated carrier at 105°C for 12h, put it into the muffle furnace for roasting after cooling, and The heating rate of 10℃ / min was raised to 500℃, then changed to 1℃ / min and the temperature was raised to 700℃, kept for 2 hours, and taken out after cooling; the treated catalyst carrier was heated at 600℃ with H 2 After reduction for 3 hours, switch to a mixed gas flow with a hydrogen-nitrogen ratio of 1:4 and protect it down to 10°C to obtain a catalytic oxidation...

Embodiment 2

[0030] The catalyst carrier is activated clay, first cleaned with distilled water, soaked in 5% hydrochloric acid for 6 hours, then placed in a boiling water bath for 4 hours, then washed with distilled water until neutral, dried at 55°C, and then roasted at 360°C for 3 hours After activation, the catalyst carrier is obtained. Use a mixed solution of manganese, palladium, silver, and nitrate with a mass concentration of 2%, 2%, and 1% to impregnate the catalyst carrier for 18 hours; dry the impregnated carrier at 75°C for 18 hours, and put it into a muffle furnace after cooling Roasting, the temperature was raised to 400°C at a heating rate of 10°C / min, and then changed to 1°C / min to 600°C, kept for 4 hours, and taken out after cooling; the treated catalyst carrier was heated at 550°C with H 2 After reducing for 1 hour, switch to a mixed gas flow with a hydrogen-nitrogen ratio of 1:3 and protect it down to 50°C to obtain a catalytic oxidation catalyst.

Embodiment 3

[0032] The catalyst carrier is made of diatomite, first cleaned with distilled water, soaked in 1% hydrochloric acid for 18 hours, then placed in a boiling water bath for 5 hours, then washed with distilled water until neutral, dried at 85°C, and then roasted at 300°C 5h for activation to obtain the catalyst carrier. The nitrate solutions of zinc and copper with a mass concentration of 5% and 25% were used to impregnate the catalyst carrier for 15h and 24h respectively; the impregnated carrier was dried at 110°C for 24h, cooled and then roasted in a muffle furnace, and then roasted in a 10 The heating rate of °C / min was raised to 550 °C in stages, and then changed to 1.5 °C / min to 760 °C for 4 hours, and then taken out after cooling; the treated catalyst carrier was heated at 680 °C with H 2After reduction for 5 hours, switch to a mixed gas flow with a hydrogen-nitrogen ratio of 1:5 and protect it down to 25°C to obtain a catalytic oxidation catalyst.

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Abstract

The invention relates to a catalyst used for inducing catalysis and oxidation and a preparation method. The invention uses one or a plurality of salt solution of transition metals with certain concentration to immerse the Al2O3 which is activated, activated clay or diatomite, puts the Al2O3 which is activated, activated clay or diatomite into a muffle furnace to be roasted after being dried to dissolve the transition metal salt and reduce the oxide on the surface of the vector into metal substance after being reduced and activated to prepare the catalyst. The mass ratio between the vector of the catalyst prepared by the invention and the loading transition metal is (70-99):(1-30). The catalyst is mainly used for the catalysis and oxidation under the existence of an external energy field and has the advantages of the large adsorption capacity, the better effect of catalysis and oxidation, the fast reaction, the stable treatment effect, the wide scope of application, the long service life and so on. The invention can quickly dissolve the micromolecular substances into small molecule substances, facilitate the quick degradation of featured pollutants and reduce the biological toxicity of organic wastewater, so as to improve the biodegradability of the wastewater.

Description

Technical field: [0001] The invention relates to a catalyst and a preparation method thereof, in particular to a catalyst for catalytic oxidation of refractory organic wastewater and a preparation method thereof. Background technique: [0002] With the continuous development of the modern chemical industry, more and more chemical products are constantly coming out. Among these products, many substances will not only seriously pollute the environment, but also have complex components, have certain toxicity, and are difficult to be degraded, such as pesticides, fine Complex chemical wastewater such as chemicals and dyes usually contains a large amount of refractory organic poisons. The water quality varies greatly and the biodegradability is poor, which brings great difficulty to the treatment. These organic poisons (especially characteristic pollutants) not only pollute the environment, but also pose a major threat to drinking water safety and people's lives and health becaus...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/38B01J23/70B01J23/80B01J23/656
Inventor 徐炎华朱骏赵浩
Owner NANJING UNIV OF TECH
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