TrickEMethod (Hive Bee)
11-06-02 09:45
No 376995
      Anhydrous HCL using a microwave  Bookmark   

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/


And on the eight day, God created Meth...
... and hasn't done much of anything usefull since!
 
 
 
 
    dwarfer
(Hive Addict)
11-07-02 19:41
No 377352
      very interesting  Bookmark   

A new way..":<)

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

":<)

cool..

dwarfer
 
 
 
 
    El_Zorro
(Hive Addict)
11-07-02 22:38
No 377388
      So how does it do when you substitute NaBr or NaI ...  Bookmark   

So how does it do when you substitute NaBr or NaI for NaCL?

Who is that masked man?
 
 
 
 
    TrickEMethod
(Hive Bee)
11-08-02 14:18
No 377648
      One question that still lingers in my mind is ...  Bookmark   

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!
 
 
 
 
    TrickEMethod
(Hive Bee)
12-17-02 14:42
No 390216
      Thinking back on this, I too am curious what ...  Bookmark   

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.cool

Let me know,
TrickE

And on the eight day, God created Meth...
... and hasn't done much of anything usefull since!
 
 
 
 
    Rhodium
(Chief Bee)
12-18-02 00:01
No 390329
      Sulfate may oxidize HI to I2, unfortunately.  Bookmark   

Sulfate may oxidize HI to I2, unfortunately. Use phosphoric or phosphorous acid instead.
 
 
 
 
    TrickEMethod
(Hive Bee)
12-18-02 09:27
No 390468
      Let me see if I understand, cuz that sounds ...  Bookmark   

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!
 
 
 
 
    Rhodium
(Chief Bee)
12-18-02 21:13
No 390568
      Try to adapt http://www.rhodium.  Bookmark   

Try to adapt ../rhodium/chemistry /hydriodic.argox.html to be microwave heated.