Siphoning boiling nitric using a pump.

[uetz2]

I guess the water induction for vacuum would trap a lot of fumes also. I'm adverse to nitric fumes.

 

[4metals]

The venturi vacuum generators I use have a recirculating water reservoir. It does build up fumes, both NOx as you noted, and Sulfur Dioxide from dropping gold. So it is vented into a feed line into the fume scrubber. Because you are correct, it does stink!

 

[Yggdrasil]

Would a weak NaOH solution in the water reservoir help with this?

 

[4metals]

It would but long term use will cause salt deposits that will clog the venturi nozzles. And the reservoir will develop a stink anyway so
permanent venting transfers any salt buildup to the fume scrubber where those build ups are monitored because you want to catch it before it clogs up.

 

[Amol Gupta]

Is there a way to determine the health(physical condition) of the tubing, signs of possible future leaks, something like preventive maintenance to minimize possible leaks.

 

[grainsofgold]

let the nitric cool then use a magnetic drive self priming pump that is acid resistant. pricey but you can use it for other things as well. As 4 metals stated the hot acid is hard on a pump and was also told by a pump supplier.

 

[Amol Gupta]

let the nitric cool then use a magnetic drive self priming pump that is acid resistant. pricey but you can use it for other things as well. As 4 metals stated the hot acid is hard on a pump and was also told by a pump supplier.

An aspirator pump is what I have resolved to.

 

[4metals]

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