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A kind of ultrapure cerium oxide compound sol

A technology of oxygen compounds and compounds, applied in the direction of rare earth metal compounds, inorganic chemistry, chemical instruments and methods, etc., can solve the problems of cumbersome preparation process, removal of sol, failure to obtain cerium oxide compound sol, etc., achieve simple process and expand application Field and parameters are easy to control

Active Publication Date: 2016-08-17
安徽江南晶盛新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This cerium oxide sol not only has a complicated preparation process, but also the sol is acidic and contains nitrate ions, which limits the scope of application of the cerium oxide sol to a certain extent (see Chinese patent: application number: CN201010514439.8, invention name: hydration Preparation method of nano cerium oxide sol, publication number: CN101973570A)
[0008] Various invention patents and academic articles have reported the preparation methods of such cerium oxide sols, but they have not really obtained the ability to remove various ions and impurities in the sol without changing the properties of the sol, and have not been able to obtain cerium oxide and water. cerium oxide sol

Method used

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  • A kind of ultrapure cerium oxide compound sol
  • A kind of ultrapure cerium oxide compound sol
  • A kind of ultrapure cerium oxide compound sol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Prepare the used raw material and weight of 100g ultrapure cerium oxide compound sol as follows:

[0056] Hypervalent cerium salt 1.0g

[0057] Grain control agent 0.1g

[0058] Nitrogenous compounds 1.0g

[0059] Ultrapure water 97.9g

[0060] Wherein the high-valent cerium salt is cerium (IV) nitrate;

[0061] The grain control agent is a polyhydroxy compound;

[0062] The polyhydroxy compound is water-soluble starch;

[0063] The nitrogen-containing compound is ammonia water.

[0064] The method for preparing the above-mentioned ultrapure cerium oxide compound sol comprises the following steps:

[0065] (1) In the presence of a grain control agent and a polymerizable monomer, the aqueous solution of cerium (IV) nitrate is stirred evenly, and then allowed to stand at room temperature for 1 hour;

[0066] (2) Heat the system in step (1), titrate the ammonia solution into step (1), after the addition is complete, adjust the pH value of the system to 7, heat the s...

Embodiment 2

[0070] The used raw material and weight of preparing 100g ultrapure cerium oxide compound sol are as follows:

[0071] Hypervalent cerium salt 10.0g

[0072] Grain control agent 10.0g

[0073] Polymerizable monomer 10.0g

[0074] Nitrogenous compounds 30.0g

[0075] Ultrapure water 40.0g

[0076] The hypervalent cerium salt described herein is a mixture of 5.0 g of cerium (IV) nitrate and 5.0 g of ammonium cerium (IV) nitrate;

[0077] The grain control agent is glucose;

[0078] The polymerizable monomer is acrylic acid

[0079] The nitrogen-containing compound is urea.

[0080] The method for preparing the above-mentioned ultrapure cerium oxide compound sol comprises the following steps:

[0081] (1) The mixed aqueous solution of cerium (IV) nitrate and cerium (IV) ammonium nitrate in the presence of grain control agent and polymerizable monomer, after stirring evenly, let it stand at room temperature for 300h;

[0082] (2) Heat the system in step (1), titrate the am...

Embodiment 3

[0086] The used raw material and weight of preparing 100g ultrapure cerium oxide compound sol are as follows:

[0087] Hypervalent cerium salt 2.2g

[0088] Grain control agent 0.1g

[0089] Polymerizable monomer 0.5g

[0090] Nitrogenous compounds 2.0g

[0091] Ultrapure water 95.2g

[0092] The hypervalent cerium salt described therein is a mixture of 0.6 g of cerium (IV) nitrate and 1.6 g of ammonium cerium (IV) nitrate;

[0093] The grain control agent is chitosan;

[0094] The polymerizable monomer is composed of 0.1g of acrylonitrile, 0.2g of sodium 2-acrylamide-2-methylpropanesulfonate, 0.1g of maleic acid and 0.1g of itaconic acid;

[0095] The nitrogen-containing compound is urotropine.

[0096] The method for preparing the above-mentioned ultrapure cerium oxide compound sol comprises the following steps:

[0097] (1) Mixed aqueous solution of cerium (IV) nitrate and ammonium cerium (IV) nitrate in the presence of a grain control agent and a polymerizable monom...

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Abstract

The invention relates to an ultra-pure cerium oxide sol. The ultra-pure cerium oxide sol comprises a high-valence cerium salt, a crystalline grain control agent, a polymerizable monomer, a nitrogen-containing compound and ultra-pure water, wherein the crystalline grain control agent is a polyhydroxyl compound, and the polymerizable monomer is an olefinic derived compound. The ultra-pure cerium oxide sol disclosed by the invention solves the technical problem that a cerium oxide sol without changes on the properties thereof and capable of eliminating various ions and impurities therein, and only composed of cerium oxide and water cannot be really obtained; a method for preparing the cerium oxide sol is simple in process, easy to control parameters and suitable for industrialization, the conductivity of the prepared cerium oxide sol with the solid content of 1-20% is only 1-100mu S / m, and impurities of nitrates, ammonium ions, urea, hydrolysates and the like are not contained, thus really realizing the purpose of purifying the cerium oxide sol.

Description

technical field [0001] The invention belongs to the technical field of inorganic material synthesis, and relates to an ultrapure cerium oxide compound sol, in particular to an ultrapure cerium oxide compound sol and a preparation method thereof. Background technique [0002] Cerium is a rare earth element with many special properties. The form of cerium used in industrial and agricultural production is mainly cerium oxide, or even cerium hydroxide. Conventional cerium oxide compounds are currently widely used in industry. However, to exhibit many special applications, ultrafine cerium oxide compounds are required. At present, the preparation methods of cerium oxide compounds have been reported in many academic papers. However, the preparation methods described in academic papers are extreme conditions for obtaining ultrafine cerium oxide compounds, which do not meet the basic requirements for industrialization. And, more micron-sized cerium oxides. How to obtain the ult...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F17/00
Inventor 王自军徐国财刘世坤夏礼稳陈敏筑吴同成李林
Owner 安徽江南晶盛新材料有限公司