Author Topic: overhead stirrer w/out gas-tight adapter  (Read 505 times)

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L_jamf

  • Guest
overhead stirrer w/out gas-tight adapter
« on: August 09, 2003, 10:48:00 PM »

abolt

  • Guest
Place the stirrer shaft down through theĀ ...
« Reply #1 on: August 10, 2003, 06:33:00 PM »
Place the stirrer shaft down through the reflux condenser


L_jamf

  • Guest
that's a good idea (and i'm confident of it...
« Reply #2 on: August 10, 2003, 07:07:00 PM »

lugh

  • Guest
Kyrides Stirrer
« Reply #3 on: August 10, 2003, 07:21:00 PM »
Download Vogel's 3d edition from:

https://www.thevespiary.org/rhodium/Rhodium/chemistry/vogel3.html


Then look on pages 68-9 for a description of the construction a Kyrides stirrer, which is even usable down to 10 mm of vacuum  :)  There's a design with pictures on Rhodium's page, at:

https://www.thevespiary.org/rhodium/Rhodium/chemistry/equipment/overhead.html

and
additionally there are many posts here and more files there such as

Post 249543 (missing)

(lugh: "Re: Homemade Stirrer", Chemicals & Equipment)
&

Post 265165 (missing)

(lugh: "Stirrer Construction", Chemicals & Equipment)
that may bee helpful if you are willing to

;)


Rhodium

  • Guest
obviously inappropriate/incompatible equipment
« Reply #4 on: August 12, 2003, 02:39:00 PM »
my stirrer shaft is not long enough to accomodate that (it's 45 cm, and this is for a 3-necked 12L RBF). the stirrer pretty much has to be in the center neck (due to stirrer paddle being for a 12L RBF) and the condenser is on one of the side necks.

You obviously have inappropriate/incompatible equipment and should do some shopping, rather than trying to reinvent the wheel. Such a mentality usually leads to reaction failures and/or glassware breakage.

L_jamf

  • Guest
thx for the input, y'all, but swim has ...
« Reply #5 on: August 13, 2003, 08:15:00 AM »
thx for the input, y'all, but swim has succeeded with the stirrer (for now), despite the poorly chosen equipment. the improvised stirrer in

https://www.thevespiary.org/rhodium/Rhodium/chemistry/equipment/overhead.html



provided me w/ some inspiration (thx lugh) that got me through the stirring i needed to do.

on a more novel note, due to swim's friend not taking into consideration that the stirrer should be made of PTFE or glass (conc. HCl + stainless steel + hrs. of reflux -> corrosion), the stirrer paddle broke free during the reflux. swim suspected this would happen, and has decided to continue the reflux (w/out stirrer) to completion to see what comes out. swim has only another 14 hrs. to completion  :P  (yawn!).

hopefully the clemmenson (spelling?) reduction will come out dandy (not in the British sense) irrespective of the stirring, but swim will try to UTFSE to determine that.

big money, no whammies, stop!
L-j