From: Justin Miller (jsmiller$##$MIT.EDU)
Date: Thu Oct 28 1999 - 11:49:47 EDT
In the undergraduate labs we have students crush KOH under dry
1,2-dimethoxyethane (DME) with a mortar and pestle. Any dry,
non-hygroscopic solvent is good (I think THF might be a little too=
hygroscopic).
J. Miller
MIT
At 09:25 AM 10/28/99 +0100, R.C.F.Jones$##$open.ac.uk wrote:
>To add to the "pestle and mortar" approach for powdered KOH, we've done it
>either under THF in a pestle and mortar, or wrapped in aluminium foil.
>Ray
>________________________________________
>Professor R C F Jones
>(Professor of Organic Chemistry)
>Department of Chemistry
>The Open University
>Walton Hall
>Milton Keynes MK7 6AA, UK
>e-mail: R.C.F.Jones$##$open.ac.uk
>tel: +44 (0)1908 653199; fax: +44 (0)1908 858327
>WWW page: http://www2.open.ac.uk/Chemistry/RCFJ.html
>________________________________________
>
>
>> ----------
>> From: Bozell, Joe
>> Reply To: joe_bozell$##$nrel.gov
>> Sent: 27 October 1999 9:44 pm
>> To: Multiple recipients of list orglist
>> Subject: RE: ORGLIST: KOH powder
>>
>> I have done this frequently merely by (rapidly) pulverizing the pellets=
in
>> a
>> mortar and pestle. The powder can then be placed under vacuum with a
>> little
>> mild heating to remove any water that might have been absorbed.
>>
>> best regards,
>>
>> Joe Bozell
>> Senior Chemist
>> National Renewable Energy Lab
>> Golden, CO
>> USA
>>
>>
>> > ----------
>> > From: Alison og Thomas Høyer
>> > Reply To: alihoyer$##$post.uni2.dk
>> > Sent: Wednesday, October 27, 1999 11:52 AM
>> > To: Multiple recipients of list orglist
>> > Subject: ORGLIST: KOH powder
>> >
>> > A procedure I wish to use calls for powdered KOH. As I pictured myself
>> > trying to squash individual pellets between two teaspoons, I remembered
>> > the orglist people: Have any of you tried preparing pulverized=
potassium
>> > hydroxide?
>> > KOH is very hygroscopic.
>> >
>> > Kindest regards,
>> >
>> > Thomas Hoyer
>> >
>> > __________________
>> >
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>> > List coordinator: Joao Aires de Sousa (jas$##$mail.fct.unl.pt)
>> >
>> __________________
>>
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