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Preparation device and process of CeO2 powder by supercritical water system oxidation

A supercritical water and nanotechnology, applied in the fields of nanotechnology, inorganic chemistry, rare earth metal compounds, etc., can solve the problems of poor controllability, low powder preparation efficiency, difficult industrialized production, etc., to achieve good corrosion problems, high production efficiency, low pollution effect

Inactive Publication Date: 2014-01-15
UNIV OF SCI & TECH BEIJING
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  • Abstract
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Problems solved by technology

[0005] In order to solve the above-mentioned problems, the present invention mainly uses a special system in which supercritical water participates in the reaction in the supercritical water system, and realizes nano-CeO through oxidation reaction and process control. 2 The preparation of powders solves the current nano-CeO 2 Preparation of nano-CeO by supercritical water system oxidation with low powder preparation efficiency, poor controllability, and difficulty in industrial production 2 powder method

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  • Preparation device and process of CeO2 powder by supercritical water system oxidation
  • Preparation device and process of CeO2 powder by supercritical water system oxidation

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Embodiment Construction

[0024] The technical solutions of the present invention will be further described below in conjunction with specific embodiments.

[0025] Such as figure 1 Shown is a kind of supercritical water system oxidation of the present invention prepares nanometer CeO 2 A powder device, which includes a feeding tank 1, a plunger pump 2, a one-way valve 3, a preheater 4, a reaction kettle 5, a magnetic stirrer 6, a condenser 7, a pressure vessel 8, a manual back pressure pump, and 9 Three valves, a first valve 10, a second valve 11, a third valve 12, a first pipeline 13. and a second pipeline 14;

[0026] Wherein, the feeding tank 1 used to hold the raw materials for the supercritical water oxidation reaction is connected with the plunger pump 2 through the one-way pump 3, and the plunger pump 2 is connected with one end of the first pipeline 13, and the first pipeline 13 A preheater 4 for heating the raw materials is arranged on the top, and the raw materials heated by the plunger p...

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Abstract

The invention provides a preparation device and process of CeO2 powder by supercritical water system oxidation. The device comprises a feed tank, a one-way pump, a plunger pump, a preheater, a reaction kettle, a magnetic stirrer, a condenser, a pressure container and a manual back-pressure valve. According to the invention, the supercritical water oxidation equipment is innovatively design and manufactured, so that the equipment has the functions of continuous production and uniformly stirring and mixing and also can better overcome blockage and corrosion problems which often happen in conventional supercritical water oxidation equipment. The nano-CeO2 prepared by the preparation device has the advantages of small powder granularity, narrow granularity distribution, good dispersion, low pollution, little energy loss and high production efficiency; and the granularity and dispersion of the nano-CeO2 powder can be controlled by controlling the concentration of Ce(NO3)3.6H20 aqueous solution, and temperature and pressure of the supercritical water oxidation equipment. The preparation device and the preparation process have wide industrial application prospect.

Description

technical field [0001] The invention belongs to the technical field of nano-material preparation, and relates to a method for efficiently preparing nano-CeO in a supercritical water system. 2 Powder apparatus and method. Background technique [0002] Nano-CeO 2 Powder has been widely used due to its particularity, but there is no very effective production and preparation technology, so a kind of nano-CeO with high efficiency, controllability and easy industrial production is studied. 2 Powder preparation technology is of great significance. [0003] supercritical water oxidation ( Supercritical water oxidation, SCWO ) technology is a new type of oxidation technology that can completely destroy the structure of organic pollutants proposed by American scholar M. Modell in the mid-1980s. Among various supercritical water chemical reactions, the most studied and most in-depth one is to use SCWO To remove toxic and harmful organic substances, supercritical water oxidation tec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F17/00B82Y40/00
CPCY02P20/54
Inventor 李宏煦王琳李超张祉倩陈雨
Owner UNIV OF SCI & TECH BEIJING
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