Sciencemadness Discussion Board
Not logged in [Login ]
Search the forums Search   Frequently Asked Questions FAQ   View member list Member List   Today's Posts Today's Posts   Forum Stats Stats Back to: sciencemadness.org
Sciencemadness Discussion Board » Fundamentals » Chemistry in General » Micro scale vacuum distillation Go To Bottom

Printable Version  
Author: Subject: Micro scale vacuum distillation
Slimz
Hazard to Others
***



Posts: 123
Registered: 18-9-2007
Member Is Offline

Mood: Inquisitive

[*] posted on 24-9-2007 at 12:39
Micro scale vacuum distillation

Microscale vacuum distilation can be a pain and often lead to low yields...

try this setup


[Edited on 24-9-2007 by Slimz]



Johnny was a chemist’s son, but now he is no more. What Johnny thought was H2O was H2SO4
View user's profile View All Posts By User
DrP
National Hazard
****



Posts: 625
Registered: 28-9-2005
Member Is Offline

Mood: exothermic

[*] posted on 25-9-2007 at 00:53


Problem here would be that the slightest bit of bumping and the sample your collecting will be contaminated. I prefer to have the glass vial after the condenser in the more traditional way. You can chill the collection flask to help with the collection.
View user's profile View All Posts By User
Slimz
Hazard to Others
***



Posts: 123
Registered: 18-9-2007
Member Is Offline

Mood: Inquisitive

[*] posted on 25-9-2007 at 04:13


thats not a problem with this setup... unless your flask is over full...



Johnny was a chemist’s son, but now he is no more. What Johnny thought was H2O was H2SO4
View user's profile View All Posts By User
Phosphor-ing
Hazard to Others
***



Posts: 247
Registered: 31-5-2006
Location: Deep South, USA
Member Is Offline

Mood: Inquisitive

[*] posted on 25-9-2007 at 08:14


You apparently haven't seen the way vacuum distillations can bump.
View user's profile View All Posts By User
Slimz
Hazard to Others
***



Posts: 123
Registered: 18-9-2007
Member Is Offline

Mood: Inquisitive

[*] posted on 25-9-2007 at 08:36


well that is a factor that would have to be dealt with.. the thing here was to make the yield higher when working with tiny quantities



Johnny was a chemist’s son, but now he is no more. What Johnny thought was H2O was H2SO4
View user's profile View All Posts By User
IPN
Hazard to Others
***



Posts: 156
Registered: 31-5-2003
Location: Finland
Member Is Offline

Mood: oxidized

[*] posted on 25-9-2007 at 08:45


I have used this type of apparatus for microscale distillations with good results.

Amounts have been >1ml though. Might be too big for <1ml.
View user's profile View All Posts By User
Slimz
Hazard to Others
***



Posts: 123
Registered: 18-9-2007
Member Is Offline

Mood: Inquisitive

[*] posted on 25-9-2007 at 09:04


interesting files

5032.pdf of size 87.568 KB
http://www.filefactory.com/file/a63d17/

8261a.pdf of size 487.025 KB
http://www.filefactory.com/file/cc9033/



Johnny was a chemist’s son, but now he is no more. What Johnny thought was H2O was H2SO4
View user's profile View All Posts By User

 Sciencemadness Discussion Board » Fundamentals » Chemistry in General » Micro scale vacuum distillation   Go To Top