Method for preparing scandium oxide with various morphologies by liquid phase precipitation method

A technology of liquid phase precipitation and scandium oxide, which is applied in the fields of chemical instruments and methods, rare earth metal oxides/hydroxides, inorganic chemistry, etc., can solve the problem that the shape of scandium oxide powder material is difficult to control, etc., and the method is simple and effective, Effects with strong maneuverability and easy control of conditions

Active Publication Date: 2019-09-17
CENT SOUTH UNIV
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Problems solved by technology

[0005] The main purpose of the present invention is to provide a method for preparing scandium oxide with various shapes by liquid phase precipitation, aiming to solve the problem that the shape of scandium oxide powder material is difficult to control

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  • Method for preparing scandium oxide with various morphologies by liquid phase precipitation method

Examples

Experimental program
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Embodiment 1

[0032] Example 1: Please refer to figure 1 , using scandium chloride solution as the raw material, adding HCl to adjust the pH to 0.5, adding polyethylene glycol with a mass of 1% of the mass of the raw material, and adding the same volume of sodium oxalate solution as the raw material in a dropwise manner, wherein the concentration of sodium oxalate It is 2.25 times the concentration of scandium ions in the raw material. After 2 hours of stirring and 24 hours of aging, the precursor is obtained. The precursor is filtered, washed and dried by natural filtration, and calcined at 720 ° C for 2 hours to obtain oxidation Scandium powder. Observed by scanning electron microscope, the morphology of scandium oxide powder material is layered accumulation of quadrangular flakes.

Embodiment 2

[0033] Embodiment 2: using scandium chloride solution as raw material, adding HCl to adjust the pH to 1.6, adding a sodium oxalate solution with the same volume as the raw material in a dropwise manner, wherein the concentration of sodium oxalate is 1.5 times the concentration of scandium ions in the raw material , After 2 hours of stirring and 24 hours of aging, the precursor was obtained. The precursor was filtered, washed and dried by natural filtration, and calcined at 800 ° C for 2 hours to obtain scandium oxide powder. Observed by a scanning electron microscope, the scandium oxide powder material has a hexagonal sheet shape.

Embodiment 3

[0034] Embodiment three: take scandium chloride solution as raw material, add the sodium oxalate solution with the same volume of raw material in the mode of dripping, wherein, the concentration of sodium oxalate is 2.25 times of the concentration of scandium ion in the raw material, after 2 hours of stirring and After aging for 24 hours, the precursor was obtained. The precursor was filtered, washed and dried by natural filtration, and calcined at 800° C. for 2 hours to obtain scandium oxide powder. Observed by scanning electron microscope, the morphology of scandium oxide powder material is amorphous fragments.

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Abstract

The invention discloses a method for preparing scandium oxide with various morphologies by using a liquid-phase precipitation method. The method for preparing scandium oxide with various morphologiesby using the liquid-phase precipitation method comprises the steps: regulating the pH value of a scandium chloride solution serving as a raw material, and adding a surfactant, wherein the mass ratio of the surfactant to the raw material is 0-1%; adding a precipitator containing oxalate ions into the scandium chloride solution, and after the reaction is completed, carrying out aging for 0-24h to obtain a precursor; filtering, washing and drying the precursor by using a natural filtering method to obtain scandium oxalate powder; and calcining the scandium oxalate powder at 650-900 DEG C for 1-3hto obtain scandium oxide powder. The scandium oxide powder with various morphologies can be obtained by using the method provided by the invention; and the method is simple, effective, easy to control conditions, strong in operability and capable of realizing industrialized application.

Description

technical field [0001] The invention relates to the technical field of preparation of rare earth oxide materials, in particular to a method for preparing scandium oxide with various shapes by a liquid phase precipitation method. Background technique [0002] The application of rare earths and rare earth oxides has always been a hot research field. Although the rare earth metal scandium is widely distributed, its content is very low and there are almost no independent deposits, so it was discovered very late. For quite a long time after its discovery, due to the difficulty in obtaining scandium, the price of scandium was very high, and its application research was correspondingly limited. With the increasing improvement of the separation method of rare earth elements, there is a fairly mature process for extracting pure scandium compounds, and its application research has also begun to rise in recent decades. [0003] Scandium has a wide range of uses and its status is gett...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F17/00
CPCC01F17/206C01P2004/03C01P2004/22C01P2004/30C01P2004/32
Inventor 李青刚彭桢张贵清曹佐英曾理关文娟
Owner CENT SOUTH UNIV
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