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Author: Subject: propane inert gas shield?
Loptr
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[*] posted on 13-5-2015 at 12:41


You might want to check this out in regards to the methylenation.

Attachment: ja00444a030.pdf (210kB)
This file has been downloaded 789 times

[Edited on 13-5-2015 by Loptr]
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drenchedingold
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[*] posted on 13-5-2015 at 16:10


Sorry brother couldn't open it. I'll try downloading a new pdf
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Loptr
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[*] posted on 13-5-2015 at 16:23


The point of the paper was that the time requirement is lowered and yield is drastically increased with the usage of DMF with potassium fluoride, or even better, cesium fluoride.

I also seem to recall reading an inert atmosphere isn't required for this particular procedure, but you want to ensure everything is very dry.

[Edited on 14-5-2015 by Loptr]

[Edited on 14-5-2015 by Loptr]
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skip
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[*] posted on 18-5-2015 at 15:55
how is done ?


Quote: Originally posted by Boffis  
I have used propane as an oxygen shield when preparing sodium cyanide from anhydrous sodium ferrocyanide and metallic sodium. The small amounts of impurities in commercial propane fuel are not a problem. You just have to remember its not so inert in contact with air but if you are flushing a reaction vessel you can always run the exhaust gas through a bunsen burner to burn it off.


like to know more about using sodium ferrocyanide and metallic sodium to produce NaCN. thanks
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Loptr
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[*] posted on 18-5-2015 at 17:04


If you really have to ask, the HCN vapor will likely kill you.

Not something to take lightly.

We had a member die a while back due to similar preparations.

The NaCN preparation on YT is actually of the member that died.
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skip
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[*] posted on 21-5-2015 at 16:40


Ive already done it lots of times on a molar scale .I was wanting to know how elemental sodium is used in the process. I always used sodium hydroxide . Have distilled hydrocyanic lots of times and never had a problem. Why does alot of people here always assume some one with a couple posts is dumb as dirt.

[Edited on 22-5-2015 by skip]
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Crowfjord
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[*] posted on 21-5-2015 at 18:53


The method of reducing ferrocyanide with sodium is posted on this forum. I think it is at or toward the end of the "Preparation of cyanides" thread, under Chemistry in General. Search and you will find.
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[*] posted on 22-5-2015 at 11:06


Sorry to hijack the thread. Thanks crowford I see now, I will stick to my way. Thanks again. Kind regards.
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