Catalyst for normal temperature and pressure catalysis wet-type oxidation technology and preparation method
A wet air oxidation and catalyst technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problem of catalyst preparation cost and high wastewater treatment cost, and it is difficult to achieve Loss of solid-liquid separation, good hydrothermal stability, easy solid-liquid separation effect
Inactive Publication Date: 2011-08-10
BEIJING FORESTRY UNIVERSITY
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Problems solved by technology
The advantage of this catalyst is that it can improve the deep oxidation effect of organic matter, but the disadvantage is that the preparation cost of the catalyst and the treatment cost of wastewater are relatively high
Method used
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Embodiment Construction
[0021] The supported catalyst Fe will be 2 o 3 -CeO 2 -TiO 2 The specific preparation steps of / HTLcs and the specific implementation of the application to the normal temperature and pressure CWAO process will be described.
[0022] First prepare an absolute ethanol solution with a Ce content of 0.2-1.0wt.% (the weight ratio of Ce to the carrier), and add tetrabutyl titanate therein so that the Ti content is 0.5-2.0wt.% (the weight ratio of Ti to the carrier) weight ratio), and then add a small amount of water and dilute HNO 3 . After stirring the above solution at room temperature for 1 hour, impregnate 20 g of zinc-aluminum HTLcs in 50 mL of the above mixed solution, pour off the upper solution after immersing at room temperature for 12 hours, steam in a water bath at 80°C for 10 hours, dry at 110°C for 2 hours, and place at 200°C to 400°C Roasting for 1.5~3h to get CeO 2 -TiO 2 / HTLcs. Then impregnated in 100mL of 0.05~0.2mol / L Fe(NO 3 ) 3 In the salt solution, th...
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The present invention relates to a load type catalyst for a catalysis wet oxidation process capable of effectively treating organic waste water difficultly degraded at normal temperature and normal pressure and a method for preparing the same, and belongs to the field of water treatment technique and environment functional materials. The catalyst takes powdery zinc-aluminum gavite as a carrier, Fe as an active component and Ce and Ti as catalysts. The catalyst is prepared by a delamination dipping method, and the preparation method comprises that: a dehydrated ethanol mixed solution of cerium salt and titanium salt is prepared and added with small amount of water and dilute HNO3, the powdery gavite is dipped in the mixed solution, subjected to water bathing, drying and calcining, dipped in an iron salt solution, and subjected to water bathing, drying and calcining again to obtain a Fe2O3-CeO2-TiO2 / HTLcs catalyst. The catalyst has the advantages of low preparation cost, the suitability for use at the normal temperature and the normal pressure, high catalytic activity, good stability, low cost of waste water treatment, and the like, and facilitates the popularization and application of the catalyst and the CWAO process, and provides an effective method for the treatment of organic industrial waste water.
Description
technical field [0001] The invention relates to a supported catalyst which can be used in catalytic wet air oxidation process at normal temperature and pressure and a preparation method thereof. The catalyst can be used in catalytic wet oxidation process to treat high-concentration refractory organic wastewater under normal temperature and pressure conditions, and Has high catalytic activity. Background technique [0002] With the development of pharmaceutical, chemical, dyestuff and other industries, the treatment of high-concentration refractory wastewater has become a major difficulty and hot spot in the field of wastewater treatment. Wet Air Oxidation (WAO for short) uses pure oxygen or oxygen in the air as the oxidant to oxidize organic pollutants in the liquid phase under the conditions of high temperature (125-320°C) and high pressure (0.5-20MPa). It is a chemical process of inorganic substances or small molecular organic substances. This technology was proposed by ...
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IPC IPC(8): B01J23/83B01J21/06C02F1/74A62D3/38A62D101/28C02F103/30C02F101/34
Inventor 孙德智王绍温刘琰陈胜
Owner BEIJING FORESTRY UNIVERSITY