Hi people.
I dont know if that was posted before, but there is a somewhat old video Ive made on nitric acid making, that can be useful.
The method is simple and the only real difficulty can be in getting conc. H2SO4.
The method simply uses a commom glass, a wine-cup glass type inside it and a HDPE sheet (with ice) above the larger glass container to resfriate and condensate the HNO3, that will drop inside the wine-glass cup. Since thermal conduction along the wine cup rod is poor, the collected nitric acid will suffer minimum re-evaporation. Use at least 3 sheets of HDPE (which is resistant to HNO3 at some degree), dont use lower quality plastics or it will eat away, throwing water/ice directly on hot sulfuric acid (this could be very nasty). In my experiments the same HDPE sheets can be re-used with safety at least 3 times, then discarded.
video: Link to video deleted because of the dangers, we are not dealing with pyrotechnics on the forum we are recovering and refining precious metals.
Butcher
Since I was using 98% grade acid and KNO3 (pre-dried first to eliminate residual water), there is almost no water in resulting HNO3, only dissolved NOx (that was eliminated after with a bit of urea and some dried air).
The acid can the be dilluted and/or NOx removed if needed or used as this..
MOST IMPORTANT: if planning doing this, do entirely under your responsability and make this under fume-hood or in an open space. You dont want to be killed by NOx gasses.
The process is slow, dont try to heat more than 80°C to speed it up or your HNO3 vapour will starts to chiefly degradate into NOx and water, decreasing your HNO3 in the receiver glass.
Ive used a electric type heating for convenience and safety. Commom glass is not designed to be used with direct fire (which could break it, spilling nasty hot acid mix and fumes everywhere).
I dont know if that was posted before, but there is a somewhat old video Ive made on nitric acid making, that can be useful.
The method is simple and the only real difficulty can be in getting conc. H2SO4.
The method simply uses a commom glass, a wine-cup glass type inside it and a HDPE sheet (with ice) above the larger glass container to resfriate and condensate the HNO3, that will drop inside the wine-glass cup. Since thermal conduction along the wine cup rod is poor, the collected nitric acid will suffer minimum re-evaporation. Use at least 3 sheets of HDPE (which is resistant to HNO3 at some degree), dont use lower quality plastics or it will eat away, throwing water/ice directly on hot sulfuric acid (this could be very nasty). In my experiments the same HDPE sheets can be re-used with safety at least 3 times, then discarded.
video: Link to video deleted because of the dangers, we are not dealing with pyrotechnics on the forum we are recovering and refining precious metals.
Butcher
Since I was using 98% grade acid and KNO3 (pre-dried first to eliminate residual water), there is almost no water in resulting HNO3, only dissolved NOx (that was eliminated after with a bit of urea and some dried air).
The acid can the be dilluted and/or NOx removed if needed or used as this..
MOST IMPORTANT: if planning doing this, do entirely under your responsability and make this under fume-hood or in an open space. You dont want to be killed by NOx gasses.
The process is slow, dont try to heat more than 80°C to speed it up or your HNO3 vapour will starts to chiefly degradate into NOx and water, decreasing your HNO3 in the receiver glass.
Ive used a electric type heating for convenience and safety. Commom glass is not designed to be used with direct fire (which could break it, spilling nasty hot acid mix and fumes everywhere).
