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Anti-oxidation method of light rare earth metal

A light rare earth, anti-oxidation technology, applied in the field of materials, can solve the problems of easy automatic combustion, high cost of storage devices, unsafe use, etc., and achieve the effects of wide application range, convenient storage and pure products

Active Publication Date: 2016-08-31
BEIJING INSTITUTE OF TECHNOLOGYGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a light rare earth metal anti-oxidation method in order to solve the technical bottleneck problems such as high cost, easy oxidation or automatic combustion, and unsafe use of the storage device in the traditional storage method of light rare earth metals.

Method used

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  • Anti-oxidation method of light rare earth metal

Examples

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Effect test

Embodiment 1

[0031] (1) Add 800ml of butyl acetate to a dry 1000mL three-neck flask, install a condensing reflux tube and a thermometer, and let in nitrogen gas; take metal sodium, scrape off the surface oxide with a knife, and cut into small slices about 0.5mm thick , add 8g flake metallic sodium to butyl acetate, heat to 128°C; after refluxing for 8 hours, add benzophenone reagent, the solution turns blue, and the blue color becomes deeper and deeper with time, indicating that the water is clean; Finally, distill and collect the butyl acetate distillate at 126°C for subsequent use; the method of removing water from carbon tetrachloride, ethyl acetate, acetone, and acetonitrile is the same as above, but the distillation temperature is different;

[0032] (2) Take 3g of granular polyhydroxypropylmethyl acrylate, add it to a three-necked flask filled with 97mL of anhydrous butyl acetate, and heat it to 60°C in a water bath until the polyhydroxypropylmethylacrylate is completely dissolved to ...

Embodiment 2

[0037] (1) Add 20g of polybis-azidomethoxetane (PBAMO) into 380mL of anhydrous ethyl acetate, stir, and heat to 50°C until NC is completely dissolved to form a glue, which is ready for use;

[0038](2) In the glove box, weigh 20g La and put it into a watch glass, add 8g of 5% polybisazidemethoxetane (PBAMO) solution, mix well, and knead it by hand after the solvent evaporates for 20min. Synthesize a flexible mass, press down and move on a 20-mesh copper sieve to make the falling matter form granular matter, and dry the granular solid material in an oven at a temperature of 47°C and a vacuum degree of 0.03 for 5 hours to obtain Antioxidant treated La. After anti-oxidation treatment, La can be stored for a long time at a relative humidity of 80% and a temperature of 20°C, which effectively improves the anti-oxidation ability of La, and can be safely used in explosives and propellants.

Embodiment 3

[0040] (1) Add 10g of beeswax into 190mL of anhydrous acetone, stir, and heat to 50°C until the beeswax is completely dissolved to form a glue, and set aside;

[0041] (2) Add 25gLa into a 300mL three-neck flask and add 200mL of anhydrous acetonitrile, install a stirrer and a thermometer, and when the temperature is raised to 58°C with stirring, add 20mL of the glue solution prepared in step (1) dropwise into the reaction flask; 42 drops per minute, the stirring speed is 300r / min, continue to stir for 15min after the dropwise addition, and cool to normal temperature;

[0042] (3) Pour the coated La into a funnel for filtration; put the filtered solid material in an oven at a temperature of 42° C. and a vacuum of 0.029 for 12 hours to obtain the antioxidation-treated La. The initial decomposition temperature of this antioxidant-treated La was 390°C.

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Abstract

The invention relates to an anti-oxidation method for light rare earth metal and belongs to the technical field of materials. The method provided by the invention comprises the following specific steps: (1) dissolving an adhesive into an anhydrous solvent, so as to prepare adhesive liquid; (2) dropwise adding the adhesive liquid into the light rare earth metal, stirring and suspending, so as to form adhesive liquid coated light rare earth metal; (3) filtering the liquid coated metal, and drying, thereby obtaining the light rare earth metal subjected to stability treatment; or directly adding the adhesive liquid into the light rare earth metal, kneading to form flexible dough, granulating, and drying, thereby obtaining the light rare earth metal. According to the method, a layer of uniform organic film is formed on the surface of the light rare earth metal, so that air and water can be effectively isolated, the light rare earth metal cannot be subjected to oxidation and spontaneous combustion during storage at a normal temperature and can be mixed with energy-containing materials in any form, the light rare earth metal can be eluted in a solvent during chemical synthesis or catalytic use, so as to remove a surface layer material, the use is not affected, and the safety problem of the light rare earth metal during storage and use under natural conditions is solved.

Description

technical field [0001] The invention relates to a technical method for anti-oxidation of light rare earth metals, in particular to an anti-oxidation preparation method for eight light rare earth metals such as lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, and gadolinium, and belongs to the field of material technology. Background technique [0002] Rare earth metals have extremely important uses in the fields of modern communication technology, electronic computers, aerospace development, medicine and health, photosensitive materials, optoelectronic materials, energy materials and catalyst materials, and are an important part of contemporary high-tech new materials. Due to the strong chemical activity of rare earth metals, they have been used in chemistry, materials science, energy materials, etc., but oxidation is the weakness of light rare earth metals, and some have seriously affected the scope of application. However, after light rare earth m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/02
Inventor 刘吉平于敦波汪玲李扩社亓云霞罗阳胡斌
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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