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Method for converting neodymium oxide into neodymium acetate crystal

A technology of neodymium acetate and neodymium oxide, which is applied in the field of preparation of rare earth acetate, can solve the problems of complex production process, low production efficiency and high production cost, and achieve the effect of high purity, high production efficiency and pure color

Inactive Publication Date: 2013-10-23
YIXING XINWEI LEESHING RARE EARTH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there is a great demand for high-purity and highly water-soluble rare earth acetate products in the market, but the existing production technology of rare earth acetate products (such as: neodymium acetate) has complex production processes, low production efficiency, and low consumption. High energy, high production cost, serious environmental pollution and other problems, the research and development of new production technology has become an urgent task

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The method that neodymium oxide is converted into neodymium acetate crystal comprises the steps:

[0023] A. Pump analytically pure glacial acetic acid and deionized water into the reaction kettle at a volume ratio of 1:1, stir evenly and heat to boiling;

[0024] B. Turn the stirring paddle and slowly add the weighed neodymium oxide into the reaction kettle. The molar ratio of the amount of neodymium oxide added to acetic acid is 1:3.9, and the stirring paddle speed is 70 rpm; the stirring paddle speed should not be too fast, too Consume energy quickly, and it should not be too slow, too slow will affect the reaction speed of materials. According to the experimental data, usually the best stirring speed is 60 to 80 revolutions per minute;

[0025] C. After the complete reaction, stop heating when heating the liquid material to 120°C, and let the liquid material in the reactor cool and crystallize naturally. During the cooling process, the stirring paddle continues to s...

Embodiment 2

[0030] The method that neodymium oxide is converted into neodymium acetate crystal comprises the steps:

[0031] A. Pump analytically pure glacial acetic acid and deionized water into the reaction kettle at a volume ratio of 1:1, stir evenly and heat to boiling;

[0032] B. Turn the stirring paddle and slowly add the weighed neodymium oxide into the reactor, the molar ratio of the amount of neodymium oxide added to acetic acid is 1:3.9, and the stirring paddle speed is 60 rpm;

[0033] C. After complete reaction, stop heating when heating the liquid material to 110°C, and use artificial rapid cooling to make the liquid material in the reactor crystallize rapidly. During the cooling process, the stirring paddle continues to stir;

[0034] D. When the temperature of the liquid material is cooled below 50°C, the agitator stops stirring, and the liquid material is discharged into the filter box and the liquid is filtered;

[0035] E. Put the filtered reactant into a centrifuge fo...

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Abstract

The invention relates to a method for converting neodymium oxide into a neodymium acetate crystal. The method is characterized by comprising the following steps of: pumping analytically-pure glacial acetic acid and deionized water into a reaction kettle according to the volume ratio of 1:1, uniformly stirring and heating until the mixture is boiled; rotating a stirring paddle, and slowly adding the weighted neodymium oxide into the reaction kettle, wherein the mole rate of the addition of the neodymium oxide to the addition of acetic acid is 1:3.9; after the reaction is ended completely, heating a liquid material to 110-125 DEG C, and then, stopping heating to enable the liquid material in the reaction kettle to naturally cool and crystallize; when the liquid material is cooled to the temperature below 50 DEG C, enabling the stirring paddle to stop stirring, filtering a liquid through a filter tank, and centrifugally dewatering; and airing the dewatered reactant in a dust-free room to realize natural evaporation. The rare earth neodymium oxide is used for manufacturing the neodymium acetate crystal, so that the method is simple in process flow, high in production efficiency, low in energy consumption and capable of reducing the production cost and environment pollution; and the neodymium acetate crystal product is high in purity and total rare earth quantity, large in crystal particle and pure in color and luster, and the added value of a product can be increased.

Description

technical field [0001] The invention relates to a preparation method of rare earth acetate, in particular to a method for converting neodymium oxide into neodymium acetate crystals. Background technique [0002] In recent years, with the development of rare earth new materials in electronics, chemical industry, environmental protection and other related fields, rare earth materials play an indispensable key role in modern emerging green energy technology, high-tech environmental protection technology and national defense military industry system. Developed countries list rare earths as strategic resources, and regard rare earth functional materials research and related application industries as key development areas. Therefore, in order to improve the utilization efficiency of rare earth resources and realize the sustainable utilization and development of rare earth resources, develop high value-added and deep processing rare earth products become a key research direction. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C53/10C07C51/41
Inventor 陈家运俞志春蒋鑫徐建文
Owner YIXING XINWEI LEESHING RARE EARTH
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