The Vespiary

The Hive => Novel Discourse => Topic started by: TrickEMethod on November 06, 2002, 09:45:00 AM

Title: Anhydrous HCL using a microwave
Post by: TrickEMethod on November 06, 2002, 09:45:00 AM
Someone may have already found this(I admit I havn't UTFSE).  But I thought this was interesting...


Preparation of Hydrogen Chloride.
     Gaseous hydrogen chloride (HCl) is generated by heating 2.0 g anhydrous sodium hydrogen sulfate (sodium bisulfate) NaHSO4 (or 2.3 g sodium hydrogen sulfate (sodium bisulfate) monohydrate NaHSO4.H2O)  and 1.0 g sodium chloride, NaCl together in a test tube by the Thermal Method (See details) according to the reaction:

NaHSO4(s) + NaCl(s)   HCl(g) + Na2SO4(s)

     Our original article called for heating the mixture with a Bunsen burner flame.  Here we report that similar results can be obtained with a microwave oven.  The general procedure described for methane is followed, except that a smaller test tube is used.  It typically takes 2 - 3 minutes in a microwave oven running on the highest setting to generate 50-mL HCl(g).  Check the progress of the reaction every 30 seconds.

     We have described eight experiments that can be performed with gaseous hydrogen chloride. (See details)



I would guess the HCL to be anhydrous, which could be interesting.

Here is the URL.

http://mattson.creighton.edu/MicrowaveMethod/ (http://mattson.creighton.edu/MicrowaveMethod/)



And on the eight day, God created Meth...
... and hasn't done much of anything usefull since!
Title: very interesting
Post by: dwarfer on November 07, 2002, 07:41:00 PM
A new way..":<)

I think the (in)famous aquarium pump air blower may find
a new use....

":<)

cool..
dwarfer
Title: So how does it do when you substitute NaBr or NaI ...
Post by: El_Zorro on November 07, 2002, 10:38:00 PM
So how does it do when you substitute NaBr or NaI for NaCL?
Who is that masked man?
Title: One question that still lingers in my mind is ...
Post by: TrickEMethod on November 08, 2002, 02:18:00 PM
One question that still lingers in my mind is whether the mono-hydrate would result in H20 vapor being present in the HCL vapor.

I guess you would find out when you started gassing!
And on the eight day, God created Meth...
... and hasn't done much of anything usefull since!
Title: Thinking back on this, I too am curious what ...
Post by: TrickEMethod on December 17, 2002, 02:42:00 PM
Thinking back on this, I too am curious what would result from heating other metal halides with sodium hydrogen sulfate... 

Could this be possible...

  NaHSO4(s) + NaI(s) ->  HI(g) + Na2SO4(s)

If so, I would assume that you could lead a small tube out of the microwave and catch the hydrogen iodide in water.

If you guys say this might work, a friend of mine is willing to tear up a microwave, I happen to have a microwave leakage detector that's long overdue for use in a major felony. 8)

Let me know,
TrickE
And on the eight day, God created Meth...
... and hasn't done much of anything usefull since!
Title: Sulfate may oxidize HI to I2, unfortunately.
Post by: Rhodium on December 18, 2002, 12:01:00 AM
Sulfate may oxidize HI to I2, unfortunately. Use phosphoric or phosphorous acid instead.
Title: Let me see if I understand, cuz that sounds ...
Post by: TrickEMethod on December 18, 2002, 09:27:00 AM
Let me see if I understand, cuz that sounds interesting.

  Phosphoric + NaI + microwave heating -> HI

That would be cool as shit.  What concentration of Phosphoric would you think necessary to have a decient chance of success?  The 20-25% stiff falls off of trees, the 70% is a bit harder to get, but doable if required.
And on the eight day, God created Meth...
... and hasn't done much of anything usefull since!
Title: Try to adapt http://www.rhodium.
Post by: Rhodium on December 18, 2002, 09:13:00 PM
Try to adapt

https://www.thevespiary.org/rhodium/Rhodium/chemistry/hydriodic.argox.html (https://www.thevespiary.org/rhodium/Rhodium/chemistry/hydriodic.argox.html)

to be microwave heated.