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Antioxidation method of light rare earth metal hydride

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

Inactive Publication Date: 2014-08-13
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the technical bottleneck problems such as traditional storage methods of light rare earth metal hydrides, high cost of storage devices, easy oxidation or automatic combustion, and unsafe use, and provide a method for anti-oxidation of light rare earth metal hydrides

Method used

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  • Antioxidation method of light rare earth metal hydride
  • Antioxidation method of light rare earth metal hydride
  • Antioxidation method of light rare earth metal hydride

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Add 800ml of butyl acetate into a dry 1000ml three-necked flask, install a condenser reflux tube, a thermometer, and introduce nitrogen; take the metal sodium, scrape off the surface oxides with a knife, and then cut into small slices about 0.5mm thick , Add 8g flake sodium metal to butyl acetate and heat to 128°C; after refluxing for 8h, add benzophenone reagent, the solution turns blue, and the blue becomes deeper and deeper with time, indicating that the water is clean; Finally, the butyl acetate distillate at 126°C was collected by distillation for use; ethyl acetate, aviation kerosene, toluene, n-heptane, and carbon tetrachloride have the same water removal method as above, and the distillation temperature is different;

[0030] (2) Take 3 g of granular methyl methacrylate and add it to a three-necked flask containing 100 mL of anhydrous butyl acetate, and heat to 60°C in a water bath until the methyl methacrylate is completely dissolved and a transparent glue is f...

Embodiment 2

[0034] (1) Add 6 g of polystyrene to 100 mL of anhydrous ethyl acetate, stir, and heat to 50°C until the polystyrene is completely transparent and form a glue solution for use;

[0035] (2) Put 20gCeH 3 Put it into a 500mL three-necked flask and add 220mL of anhydrous n-heptane, stir and heat to 50℃, and then drop 15mL of the glue prepared in step (1) into the reaction flask, the dropping rate is 40 drops per minute, and the stirring speed is 320r / min, continue stirring for 25min after the dripping is completed, and cool to normal temperature to obtain the coated CeH 3 ;

[0036] (3) CeH to be coated 3 Pour into a funnel and filter, and place the filtered solid material in an oven with a temperature of 35°C and a vacuum of 0.06 for 8 hours to obtain anti-oxidant CeH. 3 . CeH with antioxidant treatment 3 Its initial decomposition temperature is 264℃, and it will not ignite spontaneously when stored in air.

Embodiment 3

[0038] (1) Add 10g of fluororubber to 200mL of anhydrous butyl acetate, stir, and heat to 50°C until the fluororubber is completely transparent and form a glue solution for use;

[0039] (2) Put 22gCeH 3 Add to a 300mL three-necked flask and 200mL of anhydrous aviation kerosene. Install a stirring and a thermometer. When the temperature is raised to 58℃, add 20mL of the glue prepared in step (1) to the reaction flask; the dropping rate is 42 per minute. Drop, stirring speed is 300r / min, continue to stir for 15min after dropwise addition, cool to normal temperature;

[0040] (3) CeH to be coated 3 Pour into the funnel and filter; place the filtered solid material in an oven with a temperature of 35°C and a vacuum of 0.029 for 12 hours to obtain anti-oxidation CeH 3 . CeH of the antioxidant treatment 3 The initial decomposition temperature is 390℃.

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Abstract

The invention relates to an antioxidation handling method of a light rare earth metal hydride and belongs to the field of materials technology. The method comprises the following specific steps: (1) carrying out dehydration and deoxygenization treatments on a solvent so as to prepare an anhydrous anaerobic solvent; (2) dissolving an adhesive in the anhydrous solvent to prepare a glue solution; (3) dropping the above glue solution into a light rare earth metal hydride, stirring and suspending to form a glue solution coated light rare earth metal hydride; (4) filtering the solution-coated metal hydride and drying to obtain the light rare earth metal hydride which has undergone stability processing. The glue solution also can be directly added into the light rare earth metal hydride; the glue solution and the light rare earth metal hydride are kneaded to form a flexible ball; the flexible ball undergoes pelleting and drying is carried out so as to obtain the light rare earth metal hydride. According to the invention, the air and water can be isolated effectively. Thus, the safety problem of the light rare earth metal hydride stored and used under natural conditions is solved.

Description

Technical field [0001] The invention relates to a method for anti-oxidation of light rare earth metal hydrides, in particular to an anti-oxidation preparation and storage method of light rare earth metal hydrides, and belongs to the technical field of materials. Background technique [0002] Metal hydrides, especially light rare earth metal hydrides, have high combustion calorific value and can be described as high-energy materials. They are the most ideal clean energy in the 21st century. Light rare earth hydrides have significant advantages such as high weight energy storage density, wide sources, recyclability and no pollution. The application of light rare earth hydrides involves four key technical links: preparation, storage, transportation, and use, and the safe storage of rare earth oxides is the first of the key technologies. Solid hydride materials have become the most promising hydrogen storage method due to their advantages in hydrogen storage density, safe operation ...

Claims

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Application Information

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IPC IPC(8): C01B6/34C01B6/02
Inventor 刘吉平汪玲亓云霞
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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