Well, received my new vacuum pump, before that been using a small manual pump, and to be honest was good enough , so.. since it has motor etc, can i use in vacuum distillations without risks?
Can i use safely a vacuum pump with the typicall MDMA solvents? (xylene, IPA ,HCL, NAOH , etc?
- Thread starter IM BATMAN
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Depending on the material of the pump parts that come into contact with the solvent, a cold trap should be connected in order to condense the vapors that are created by the vacuum. This also prevents the solvent vapors from being distributed in the room.
en.wikipedia.org
You should also create a possibility to regulate the vacuum, not always the full suction power is needed.
I have solved this with a T-piece in the suction line where I can inject false air to adjust the vacuum.
Cold trap - Wikipedia
You should also create a possibility to regulate the vacuum, not always the full suction power is needed.
I have solved this with a T-piece in the suction line where I can inject false air to adjust the vacuum.
Tnx a lot friend, thats very nice , for the vapour i had an extractor directly on the output of the manual pump, but this method is just what i need.
tnx again Sir.
tnx again Sir.
ok, all understood, the assembly is very simple and logic haha...... just... with ice bath should be enough right? not needed liquid nitrogen for that , right?
Depends on solvent (for example, better to use liquid nitrogen with diethyl ether) but usually, as Pennywise said, ice salt bath is enough.
as for the dewar.... there is another option? just ice/bath salt is not enough? like use a metallic container of an appropiate size?
The greater the amount of salt, the lower the freezing point (to a point; once there is sufficient salt that no more will dissolve, the freezing point no longer decreases). Ocean water is about 3.5% salt; sea water freezes at about 28°F (-2° C). A 10% salt solution freezes at about 20°F (-6°C), and a 20% solution freezes at 2°F (-16°C).
so, i would go for total saturated? like a brine? or that would be neccesary if would be able to freeze at lower than -16? with liquid nitrogen etc? for a simple water/ice bath , since i seen it follows a proportion, what salt % would you recommend me?
i dont have a dewar, but a thermo container would work? (dont know if thermo is correctly named in english? (the one used to keep cold/warm the food/cofee etc)
i dont have a dewar, but a thermo container would work? (dont know if thermo is correctly named in english? (the one used to keep cold/warm the food/cofee etc)
Yes, you can use it as well. If you need to make less temperature, read about Dry ice (-78.5 deg) laboratory handling and Liquid nitrogen (N2) laboratory handling
I have supersaturated the brine with salt, so with me there is still salt on the bottom which has not dissolved, above is always a thick soft layer of ice, like snow slush and according to the thermometer -21-23°C cold. With acetone I could try even deeper, but that's enough for me. I also use the brine to cool my flask during exothermic reduction, I use the same brine all the time.
If you need to go even lower, find out about dry ice deliveries in your area, the dry ice can probably be used for up to 48h and also delivered on schedule.
Yes you can, if it is big enough, a dewar is the same only two times and more isolated in industry standard, I got one cheap at a second hand onlinestore in the correct size for my trap.
If you need to go even lower, find out about dry ice deliveries in your area, the dry ice can probably be used for up to 48h and also delivered on schedule.
Yes you can, if it is big enough, a dewar is the same only two times and more isolated in industry standard, I got one cheap at a second hand onlinestore in the correct size for my trap.
so... that sounds now the only think i need is to measure the temp and get a noore logic to me, just i was thinking about how hard would be get ice rocks from a brine, but if you say i just have to measure the temp. and get for a snow consistence ill do correctly.
as for the dry ice i was thinking about it , inside my homemade dewar flask could fix all that problem. gonna make a search now to see if i can get it.
about dry ice , is not a problem with fumes etc right? it just sublimate without any risk right?
about the gas solvents i want to "eliminate" will be IPA , Xylene , DCM ... and the HCL / NAOH from the alkali/acid steps....
those would be "eliminated" easily?
