rotavapor

[benzyme]

a certain grackle finally got one :d

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=220649148276

 

[jbark]

Schnazzy item - be sure to congratulate your grackle!

JBArk

 

[ms_manic_minxx]

Ummm... Can I use it to make coffee, too? :d

 

[aetherbound]

Benzy ,,,you never cease to amaze me!!!Much love....lol

Aetherbound

 

[hyperspacing]

dam ben. big spender lol. can i borrow some cash?

 

[1992]

You can't have that! You're going to jail!

 

[Rivea]

Definitely a nice way to go for evaporation and reclamation of solvents... I want a lot of different toys in my toy box that I will have to take some time in acquiring.

 

[benzyme]

the bird used one back in the day in polymer synthesis, the rotovap leaves behind beautiful crystals in the spinning flask. very familiar with using them

this is like an appliance. many possibilities, from homebrew alcohol distillation, essential oil purification, to recrystallization.

 

[dakkapel]

..this is like an appliance..

Found an older one
With some missing parts. Would like to ask some questions about it to the more experienced.

- need to buy tubes to connect the vacuumpump. Does it matter in respect to the used solvents what material it is made of?

- the specs of the pump are:
34l/min/ultimate vacuum 8mbar abs/max contin pressure 1 bar/ permiss temperat +5...+40C
That means that a boiling point will be brought down with 30C? hexaan-> from 69 to 38
What does abs means? +40C ?

- there is no manometer with it or any regulator. Is this necessary?

- there is no clip to secure the evaporator ball flask to the tube of the rotavap. is this neceessary?

Would be great if someone could help me with these questions....

 

[benzyme]

- need to buy tubes to connect the vacuumpump. Does it matter in respect to the used solvents what material it is made of? no. tygon tubing is standard.

- the specs of the pump are:
34l/min/ultimate vacuum 8mbar abs/max contin pressure 1 bar/ permiss temperat +5...+40C
That means that a boiling point will be brought down with 30C? hexaan-> from 69 to 38
What does abs means? absolute.
+40C ? maximum ambient operating temperature.

- there is no manometer with it or any regulator. Is this necessary?
a regulator of some sort is recommended

- there is no clip to secure the evaporator ball flask to the tube of the rotavap. is this neceessary? yes

 

[dakkapel]

- need to buy tubes to connect the vacuumpump. Does it matter in respect to the used solvents what material it is made of? no. tygon tubing is standard.

(...)

- there is no clip to secure the evaporator ball flask to the tube of the rotavap. is this neceessary? yes

Thank you so much! I am working hard to get it working... Maybe you want to answer another question for me?

I have a vacuum membrane pump but the woulfe's bottle is missing.
How important is a woulfe's bottle?

Secondly, I want to use a round-bottom flask for evaporation. But I see on pictures that a more conicly form flask is been used. Does it matter?

 

[benzyme]

sounds like it's used as a vacuum vapor trap. it's not critical