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Topic: Dry Solvents...?  (Read 7400 times)

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Offline Roxanne

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Dry Solvents...?
« on: May 11, 2007, 04:52:25 PM »
Hi there,

We were looking into KF titrators in order to monitor the dryness of the solvents that comes off our solvent system.  We were shocked at their price.

Is there no simpler/cheaper way to determine the dryness of your solvents...?

If not, recommend any specific type of KF titrator?


Thanks!

Roxanne.

Offline movies

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Re: Dry Solvents...?
« Reply #1 on: May 14, 2007, 02:06:40 PM »
K-F is really the best.  If you're feeling up to it, you could try titrating the solvents manually, but that really sucks.  Sometimes you can send a sample of your solvent off to someone who already has a K-F titrator and they will run it for you.

Offline Donphil07

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Re: Dry Solvents...?
« Reply #2 on: September 09, 2007, 10:16:01 PM »
Hi!
there are a lot of methods for drying solvent.
1. you can you CaH2 in order replace KF
2. You can you Dean-stark trap, it is very good and safe, i was successsful with my experiment.
3. you can dowloat furification solvent book for answering your question.
good luck!!! 

Offline rkaminski

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Re: Dry Solvents...?
« Reply #3 on: September 11, 2007, 06:34:15 PM »
In most of the cases (hexane, toluene, ...; of course there are some exceptions) the best system, for drying solvents, is Ph2CO + Na (or even alloy NaK), and than reflux it at least one or a few days. Of it has to be done in inert atmosphere (I suggest using of N2, the cheapest one, but not in all cases the best).

Offline lavoisier

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Re: Dry Solvents...?
« Reply #4 on: September 12, 2007, 01:25:35 PM »
Hi there,

We were looking into KF titrators in order to monitor the dryness of the solvents that comes off our solvent system.  We were shocked at their price.

Is there no simpler/cheaper way to determine the dryness of your solvents...?

If not, recommend any specific type of KF titrator?


Thanks!

Roxanne.

Mettler Toledo titrators are usually cheaper. Or you might buy a used one.

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