Add 5G diced nitrogen diced into 50 mL ethanol and heat it to 50 ° C. (It is not recommended to heat it here, because the control is not good, it will explode, and the entire laboratory will be full of smoke, which is very dangerous. It is recommended to use it. It is recommended to use it. It is recommended to use it.Just cover your hand.) Stir to dissolve the cause, and immediately filter the heat to remove the insoluble object.The filter liquid is cooled in the refrigerator deep (or crystals in the ice water bath.) The product obtained from the stirring is powder -like, the static crystallization product is the needle -shaped product, which is very beautiful.Puppet nitrogen two -different Crystal crystals.Filter with the bucket of buckets, the crystal is placed in a vacuum container, and the solvent was removed at room temperature decompression.
Add 5G diced nitrogen diced into 50 mL ethanol and heat it to 50 ° C. (It is not recommended to heat it here, because the control is not good, it will explode, and the entire laboratory will be full of smoke, which is very dangerous. It is recommended to use it. It is recommended to use it. It is recommended to use it.Just cover your hand.) Stir to dissolve the cause, and immediately filter the heat to remove the insoluble object.The filter liquid is cooled in the refrigerator deep (or crystals in the ice water bath.) The product obtained from the stirring is powder -like, the static crystallization product is the needle -shaped product, which is very beautiful.Puppet nitrogen two -different Crystal crystals.Filter with the bucket of buckets, the crystal is placed in a vacuum container, and the solvent was removed at room temperature decompression.
Any experiments that talk about polymer science have AIBN refining. You can check the standard steps.When we do it, heated ethanol (too poisonous methanol). When the ethanol is close to the boiling point, slowly add an appropriate amount of AIBN (the formula is similar according to the description upstairs), quickly stir.The liquid is quickly filtered, removed it, and then cooled the thermal solution to the refrigerator near the refrigerator. Observe whether it is a needle -shaped crystal beard. The general purity of the needle length is relatively high. If the crystallization comes out, you need to repeat the above steps.Generally, if you repeat 3 times, due to the more decomposition, you need to join the new AIBN to continue.
Any experiments that talk about polymer science have AIBN refining. You can check the standard steps.When we do it, heated ethanol (too poisonous methanol). When the ethanol is close to the boiling point, slowly add an appropriate amount of AIBN (the formula is similar according to the description upstairs), quickly stir.The liquid is quickly filtered, removed it, and then cooled the thermal solution to the refrigerator near the refrigerator. Observe whether it is a needle -shaped crystal beard. The general purity of the needle length is relatively high. If the crystallization comes out, you need to repeat the above steps.Generally, if you repeat 3 times, due to the more decomposition, you need to join the new AIBN to continue.
5GAIBN plus 50ml methanol, heat it at 50 degrees for about 5 minutes, filter while hot, cool the filter liquid in the refrigerator, then draw the filter, and the room temperature is dry.Just it's okay
5GAIBN plus 50ml methanol, heat it at 50 degrees for about 5 minutes, filter while hot, cool the filter liquid in the refrigerator, then draw the filter, and the room temperature is dry.Just it's okay
Crystal crystals.Filter with the bucket of buckets, the crystal is placed in a vacuum container, and the solvent was removed at room temperature decompression.
Crystal crystals.Filter with the bucket of buckets, the crystal is placed in a vacuum container, and the solvent was removed at room temperature decompression.
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Observe whether it is a needle -shaped crystal beard. The general purity of the needle length is relatively high. If the crystallization comes out, you need to repeat the above steps.Generally, if you repeat 3 times, due to the more decomposition, you need to join the new AIBN to continue.
Observe whether it is a needle -shaped crystal beard. The general purity of the needle length is relatively high. If the crystallization comes out, you need to repeat the above steps.Generally, if you repeat 3 times, due to the more decomposition, you need to join the new AIBN to continue.
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