qst42know
Well-known member
Is vacuum evaporating as in concentrating sulfuric acid, faster or just more energy efficient?
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Non-Chemical Vacuum evaporating.
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Anonymous
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I am not sure it is either, since a small quantity of water will make a tremendus volume of vapor and the dryer the sulfuric gets the harder it hold on to water, or takes water from anything it can.
Jim
Jim
qst42know
Well-known member
I understand the idea behind a hard vacuum is you can boil things at a much lower temperature. Under vacuum some solutions will boil even at room temp. However I don't know if this is faster or a savings in heat energy or both?
It would save heat energy. I built a vacuum still, just for that reason once.
Water will boil at normal room temperatures or even lower, with a high enough vacuum.
I was just shooting for 25 inches with an old automotive airconditioning compressor.
Randy
Water will boil at normal room temperatures or even lower, with a high enough vacuum.
I was just shooting for 25 inches with an old automotive airconditioning compressor.
Randy
leavemealone
Well-known member
Hey randy,your vacuum idea would work fine if you utilized two containers capable of withstanding the boiling temperatures(distilling flasks) connected by a noncollapsable hose or tube.One could be used as your boiling aparatus,the other for vapor condensation,with the pump and filter on that one.That would allow most of the vapor to condensate before entering the filter.If you could install a heat resistant valve you could close off the connection when you've reached your desired pressure,then turn it back on as the air explands,giving your pump intermitant rests.Just a thought.
Hi Johnny,
mine was just to distill fuel alcohol. But, those are good ideas.
Randy
mine was just to distill fuel alcohol. But, those are good ideas.
Randy
leavemealone
Well-known member
Hey bud,I am not too familiar with that.I have what you need but They are going to jack this week.I boiled mine down and you are so right,it took so long,especially as the concentration started to slow the boiling.Jack has a pump now,if I do it again I will certainly get his and make a condensing container.
Hope you had a good weekend
Hope you had a good weekend
I'm somewhat familiar with vacuum evaporation. :lol: :lol:
It saves time, yes, but does it really save energy? Well, I suggest you review thermodynamics--the energy to make that vacuum has to come from somewhere. No escaping it.
It will go quicker, but really, I wouldn't recommend vacuum evaporating sulfuric acid unless perhaps you were using a recirculating aspirator--any acidic vapors would quickly destroy a pump unless it had a beastly foretrap.
It saves time, yes, but does it really save energy? Well, I suggest you review thermodynamics--the energy to make that vacuum has to come from somewhere. No escaping it.
It will go quicker, but really, I wouldn't recommend vacuum evaporating sulfuric acid unless perhaps you were using a recirculating aspirator--any acidic vapors would quickly destroy a pump unless it had a beastly foretrap.
qst42know
Well-known member
Hi Lou.
My goal is to pursue the silver plate thing. With the quantities out there if I can get my efficiencies in line I suspect I can make a go of this. Diluting and concentrating the sulfuric seems the largest hurdle. Any suggestions?
My goal is to pursue the silver plate thing. With the quantities out there if I can get my efficiencies in line I suspect I can make a go of this. Diluting and concentrating the sulfuric seems the largest hurdle. Any suggestions?
