On Friday, June 24, 2016 at 12:34:47 PM UTC-4, Peter Fairbrother wrote:   
   > I don't need anhydrous, but am going to produce ammonia gas (for    
   > nitriding) by heating aqueous ammonia.   
   >    
   > Would like to dry it a bit though.   
   >    
   > Any suggestions?   
   >    
   >    
   >    
   > -- Peter F   
      
   You can try passing it through a column of soda-lime, calcium chloride   
   pellets, quicklime (CaO), or another drying agent. Perhaps if you lead it   
   through a length of empty tubing first, some of the water will condense before   
   the gas reaches the drying    
   column so the drying agent works longer. I haven't done this myself, but if   
   you search the chemical literature you are sure to find plenty of diagrams for   
   drying apparatuses.   
      
   You can also try mixing together ammonium sulfate fertilizer and sodium   
   hydroxide. I read about one person who mixed these together dry and added only   
   a little water to make NH3 gas. Water is a byproduct, so the gas formed this   
   way will be wet.   
      
   Best of luck!   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)