Re: ORGLIST: Removal of DMF.

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From: Richard Prankerd (Richard.Prankerd$##$vcp.monash.edu.au)
Date: Sun Jun 24 2007 - 22:16:19 EDT

Christopher:

DMF can be removed with a rotovap, if the following precautions are taken: (a) the seal around the rotating shaft must be checked and freshly sealed with good quality vacuum grease; (b) vacuum must be from a mechanical pump in good condition, pulling < 0.5 mmHg; (c) the rotating flask must be heated to over 100 deg C; (d) the receiver must be cooled with ice water.

Removal can still be slow.

Richard

-----Original Message-----
From: everybody-bounces$##$orglist.net on behalf of Christopher Luus
Sent: Mon 6/25/2007 11:41 AM
To: everybody$##$orglist.net
Subject: ORGLIST: Removal of DMF.
 
Can anyone recommend an effective way of removing DMF from a crude reaction
mixture? We have tried evaporation at high temperatures and low pressure
using a rotovap to no avail.

 

Any suggestions would be greatly appreciated.

 

Thanks in advance,

Christopher Luus.


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