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Method for producing holmium acetate crystal

A production method and acetic acid technology are applied in the production field of holmium acetate crystals, which can solve the problems of complex production process, low production efficiency and high production cost, and achieve the effects of high purity, high production efficiency and pure color and luster.

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

AI Technical Summary

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: holmium 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

[0021] The production steps of holmium acetate crystals are as follows:

[0022] A. Pump analytically pure glacial acetic acid and deionized water into the reaction kettle at a volume ratio of 1:0.5, stir evenly and heat to 50°C; B. Turn the stirring paddle and slowly add the weighed holmium carbonate into the reaction kettle, The molar ratio of the amount of holmium carbonate added to acetic acid is 1:3.3, and the rotation speed of the stirring paddle is 60 rpm; , usually the stirring blade speed is preferably 50 to 70 rpm per minute;

[0023] 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 stir; the so-called complete reaction can be observed with the naked eye. After adding holmium and reacting for a period of time, there is no foam in the reactor, and the material liquid becomes clear without light ...

Embodiment 2

[0028] The production steps of holmium acetate crystals are as follows:

[0029] A. Pump analytically pure glacial acetic acid and deionized water into the reaction kettle at a volume ratio of 1:0.5, stir evenly and heat to 50°C; B. Turn the stirring paddle and slowly add the weighed holmium carbonate into the reaction kettle, The molar ratio of the amount of holmium carbonate added to acetic acid is 1:3.3, and the rotation speed of the stirring paddle is 50 rpm;

[0030] C. After complete reaction, stop heating when heating the liquid material to 110°C, use artificial rapid cooling to make the liquid material in the reactor crystallize rapidly, during the cooling process, the stirring paddle continues to stir;

[0031] 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;

[0032] E. Put the filtered reactant into a centrifuge for dehydration for ...

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Abstract

The invention relates to a method for producing a holmium acetate crystal. The method is characterized by comprising the following steps of: pumping analytically pure glacial acetic acid and deionized water at the volume ratio of 1:0.5 into a reactor, stirring uniformly, and heating to the temperature of 50 DEG C; rotating a stirring paddle, and adding the weighed holmium carbonate into the reactor slowly, wherein the molar ratio of the added holmium carbonate to the glacial acetic acid is 1:3.3; heating a liquid material to the temperature of 110-125 DEG C after the materials react completely, and stopping heating to naturally cool the liquid material in the reactor to crystallize; cooling the liquid material to the temperature below 50 DEG C, discharging the liquid material into a filtering box, removing liquid by filtering, and dehydrating centrifugally; and airing the dehydrated product of reaction in a dust-free room to evaporate naturally. The method for producing the holmium acetate crystal from the carbonate holmium (rear earth) is simple in technological process, high in production efficiency and low in production cost, consumes less energy and causes less pollution to the environment. In addition, the holmium acetate crystal is high in purity, high in content of rear earth, high in additional value, large in particle size and pure in color.

Description

technical field [0001] The invention relates to a preparation method of rare earth acetate, in particular to a preparation method of holmium acetate crystal. 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. At present, there is a g...

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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