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Subject: Re: Questions out of my realm
Date: Fri, 10 Mar 2006 14:07:47 EST
Author: DanielD734**At_Symbol_Here**AOL.COM 		Next by Date:
Subject: Re: Questions out of my realm
Date: Fri, 10 Mar 2006 11:42:21 -0800
Author: "Latimer, Lee"


Date: Fri, 10 Mar 2006 14:21:05 -0500
Reply-To: "Jeskie, Kimberly B." <jeskiekb**At_Symbol_Here**ORNL.GOV>
Sender: DCHAS-L Discussion List <DCHAS-L**At_Symbol_Here**LIST.UVM.EDU>
From: "Jeskie, Kimberly B." <jeskiekb**At_Symbol_Here**ORNL.GOV>
Subject: Re: Questions out of my realm
Comments: To: ACTSNYC**At_Symbol_Here**CS.COM


It's been a long time since I was in an organic synthesis lab as a
technician (therefore, limited knowledge); however, boiling ether for
recrystalization purposes just doesn't sound right.  If they are using
ether as a "good" solvent to dissolve their material in before crashing
it out with a "bad" solvent and it takes heating it to make it go into
solution, sounds like a bad choice of solvents.  They could have been
following a proven recipe though and for that I don't have an answer.
Maybe closed system under nitrogen with the bad solvent dripped in???

As for the butyl lithium, definitely under an inert gas, closes system
with a bleed line (bubbler).  Adding the alcohol drop-wise to the butyl
lithium.  Cooled with something that's not water-based.

Found this doing a quick google search.  Haven't read it though.
http://www.ehs.uci.edu/programs/sop_library/Particularly%20Hazardous%20O
perations%20SOPs/quench-reactive-organometallic-.doc

Kimberly Begley Jeskie, MPH-OSHM
Operations Manager
Physical Sciences Directorate
Oak Ridge National Laboratory
(865) 574-4945

-----Original Message-----
From: DCHAS-L Discussion List [mailto:DCHAS-L**At_Symbol_Here**LIST.UVM.EDU] On Behalf Of
ACTSNYC**At_Symbol_Here**CS.COM
Sent: Friday, March 10, 2006 11:51 AM
To: DCHAS-L**At_Symbol_Here**LIST.UVM.EDU
Subject: [DCHAS-L] Questions out of my realm

All,

I got the following two questions from a colleague and since I work in
the 
art field, these are out of my area.  Can I get some help?

1.  a student was boiling ether in a large open flask on a stirrer
hotplate 
and the fume alone caught on fire, inside the hood. .  Do you have
suggestions 
for them to reduce the ether amount for re-crystallization in a safer
manner? 

2. a student in was quenching butyl lithium with n-propanol in an open
flask 
and it also caught on fire.  Is there a safer way to quench the butyl
lithium 
w;ithout catching on fire?

Monona Rossol

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