A kind of crystal transformation method of aluminum hydride
A technology of aluminum hydride and crystal transformation, applied in chemical instruments and methods, metal hydrides, inorganic chemistry, etc., can solve the problems of long time consumption and low conversion rate, and achieve low cost, high crystal transformation efficiency, and easy operation and control Effect
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Embodiment 1
[0022] A method for crystal transformation of aluminum hydride, comprising the following steps: taking polycrystalline aluminum hydride and adding it to a solvent under a dry inert gas atmosphere, the solvent is tetrahydrofuran, and the mass-volume ratio of polycrystalline aluminum hydride to the solvent is: 5g︰400mL, stirred for 20min, and suction filtered to remove insoluble impurities to obtain an aluminum hydride solution; then ultrasonically treated for 2 hours at an ultrasonic frequency of 130kHz; followed by rotary evaporation to obtain aluminum hydride granular crystals; aluminum hydride granular crystals Place it in air with a humidity of 30% RH for 3 hours, then add a solvent for secondary dissolution, filter, and rotary evaporate, and dry the product at a vacuum of 490mmHg and 70°C for 2 hours to obtain 4.2g of aluminum trihydride. The X-ray diffraction test was carried out on the aluminum hydride obtained by crystallization, and the result showed that the proportion...
Embodiment 2
[0024] A method for crystal transformation of aluminum hydride, comprising the following steps: taking polycrystalline aluminum hydride and adding it to a solvent under a dry inert gas atmosphere, the solvent is ether, and the mass-volume ratio of polycrystalline aluminum hydride to the solvent is: 10g︰200mL, stirred for 30min, removed insoluble impurities by suction filtration, and obtained aluminum trihydride solution; then carried out ultrasonic treatment for 4 hours, and the ultrasonic frequency was 50kHz; followed by rotary evaporation to obtain aluminum trihydride granular crystals; Place it in air with a humidity of 50% RH for 1 hour, then add a solvent for secondary dissolution, filter, and rotary evaporate, and dry the product at a vacuum of 320mmHg and 50°C for 5 hours to obtain 8.6g of aluminum trihydride. The X-ray diffraction test was carried out on the aluminum hydride obtained by crystallization, and the result showed that the proportion of α-aluminum hydride in ...
Embodiment 3
[0026] A method for crystal transformation of aluminum hydride, comprising the following steps: taking polycrystalline aluminum hydride and adding it to a solvent under a dry inert gas atmosphere, the solvent is tetrahydrofuran, and the mass-volume ratio of polycrystalline aluminum hydride to the solvent is: 8g︰300mL, stirred for 25min, removed insoluble impurities by suction filtration, and obtained aluminum trihydride solution; then carried out ultrasonic treatment for 3 hours, and the ultrasonic frequency was 100kHz; then carried out rotary evaporation to obtain aluminum trihydride granular crystals; Place it in air with a humidity of 40% RH for 2 hours, then add a solvent for secondary dissolution, filter, and rotary evaporate, and dry the product at a vacuum of 395mmHg and 60°C for 3.5 hours to obtain 7.1g of aluminum trihydride. The X-ray diffraction test was carried out on the aluminum hydride obtained by crystallization, and the result showed that the proportion of α-al...
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