Thanks for usefull video! But I have a small remark. To be 100% sure that molecular sieves are dry enough it is better to weight the flask with the content after each heating-evacuating-cooling cycle until the weight stopped to decrease (or change in mass will be negligible, 10 mg or less).
Use a micron vaccuum gauge and know the low pressure limit of your vacuum pump. When you reach that you know that there is no more water coming off the sieves. So easy and hassle free...
Hello and Please forgive me for asking this question. I consider you a competent person and therefore ask you. Can you tell me whether I can regenerate oxy sieve in the molecular sieve beds without opening the container?
I've read that lab oven often won't get over 250° C (necessary for zeolites to release all water). I am thinking about using an alcohol burner for partial drying in flask (without vacuum). I hope it will work.
@@LiborTinka 80/20 rules the day also there in my opinion. Or 90/10 in this case. The quickest way for getting the most result is a heated vacuum exsiccator. Put a dish with sieves in, and when you reach the end pressure of your pump, 30 microns or something, you are finished. No work, just wait and do other stuff...
That is NOT how you dry sieves. Please dont teach audience unless you know what you are doing. And remove that ethanol before you are dealing with flame. 1. Keep sieves inside oven until you want to dry them. 2. Use round bottom flask and not two neck flask. Check RBF to make sure it has no cracks. 3. Dry sieves under vacuum not nitrogen or argon. Yes too much heat will implode flask, but you will have time to quickly take it off of the flame and increase pressure. The flask will not break as long as there are no cracks. Also, ensure there is no solvent in the vacuum trap before you start drying under vacuum. 4. Leave flask to cool for at least 24 h under vacuum and its ready to go. Check water contect of dried solvent to confirm dryness.
![Noob To Max With DRAGON REWORK In Blox Fruits [FULL MOVIE]](http://i.ytimg.com/vi/LnBMOinoOvA/mqdefault.jpg)
I like how he's running a Bunsen burner right next a bottle of Ethanol! Man after my own heart.
Thanks for usefull video! But I have a small remark. To be 100% sure that molecular sieves are dry enough it is better to weight the flask with the content after each heating-evacuating-cooling cycle until the weight stopped to decrease (or change in mass will be negligible, 10 mg or less).
Use a micron vaccuum gauge and know the low pressure limit of your vacuum pump. When you reach that you know that there is no more water coming off the sieves. So easy and hassle free...
Hello and Please forgive me for asking this question. I consider you a competent person and therefore ask you. Can you tell me whether I can regenerate oxy sieve in the molecular sieve beds without opening the container?
What can we do if we dont have a vacuum?
It spend how much time? At lease?
I saw someone drying it in a microwave. That's what I plan to do.
Isn't it just easier to dry them in a vacuum oven?
I've read that lab oven often won't get over 250° C (necessary for zeolites to release all water). I am thinking about using an alcohol burner for partial drying in flask (without vacuum). I hope it will work.
@@LiborTinka 80/20 rules the day also there in my opinion. Or 90/10 in this case.
The quickest way for getting the most result is a heated vacuum exsiccator. Put a dish with sieves in, and when you reach the end pressure of your pump, 30 microns or something, you are finished. No work, just wait and do other stuff...
Not every lab has a vacuum oven standing around and its questionable to buy one just for activating mol sieves
I dried in the oven and it fucking got fired
That is NOT how you dry sieves. Please dont teach audience unless you know what you are doing. And remove that ethanol before you are dealing with flame.
1. Keep sieves inside oven until you want to dry them.
2. Use round bottom flask and not two neck flask. Check RBF to make sure it has no cracks.
3. Dry sieves under vacuum not nitrogen or argon. Yes too much heat will implode flask, but you will have time to quickly take it off of the flame and increase pressure. The flask will not break as long as there are no cracks. Also, ensure there is no solvent in the vacuum trap before you start drying under vacuum.
4. Leave flask to cool for at least 24 h under vacuum and its ready to go. Check water contect of dried solvent to confirm dryness.