devilunix
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How to recover ethylene glycol in water\sulphuric acid
Hello. I cant recover eg in solution. Any idea to do this?
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JJay
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Is this a homework problem? It's not that hard to do, but sulfuric acid and ethylene glycol are easy to obtain and not that expensive. Most people
would just pour the mixture down the drain and buy them fresh.
[Edited on 4-8-2017 by JJay]
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devilunix
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No i work at plant. We have tons of mixture. I need to recover eg. Talkin about over 100tons
[Edited on 4-8-2017 by devilunix]
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Sigmatropic
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Seems highly unlikely. Send it to a company specialized in recovering spent acid.
I don't want to get ahead of myself but I don't think SM is the place for questions relating to Industrial chemistry, it does say Amateur
experimentation, doesn't it?
Thinking about it; amateurs in industry, what could go wrong mhhmmmm?
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PirateDocBrown
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Neutralize with lime. Filter off calcium sulfate. Fractional distillation.
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devilunix
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thanks alot i will try
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XeonTheMGPony
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well do a small process batch in a lab then calculate your scale up or you can have one mother of a sod up!
and what do you plan to do with all the calcium sulfate!
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JJay
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I would try distilling off the ethylene glycol under vacuum and then distilling the sulfuric acid. I'm pretty sure you'll need a vacuum to distill off
the ethylene glycol to minimize the quantity of sulfate esters and decomposition products. Some sulfate esters will form no matter what you do.
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devilunix
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Quote: Originally posted by XeonTheMGPony  | well do a small process batch in a lab then calculate your scale up or you can have one mother of a sod up!
and what do you plan to do with all the calcium sulfate! |
i will sell them
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I would try distilling off the ethylene glycol under vacuum and then distilling the sulfuric acid. I'm pretty sure you'll need a vacuum to distill off
the ethylene glycol to minimize the quantity of sulfate esters and decomposition products. Some sulfate esters will form no matter what you do.
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i have vacuum distillation system
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unionised
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| Quote: Originally posted by JJay | | I would try distilling off the ethylene glycol under vacuum and then distilling the sulfuric acid. I'm pretty sure you'll need a vacuum to distill off
the ethylene glycol to minimize the quantity of sulfate esters and decomposition products. Some sulfate esters will form no matter what you do.
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The water would distil off first and then the acid would react with the glycol and make dioxane (among other things) .
Dioxane's not nice stuff.
You need to neutralise the acid first.
Vacuum distillation's still a good idea.
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JJay
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I think dioxane production would be negligible with a low enough vacuum.
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PirateDocBrown
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Calcium sulfate's not worth much. Nor is EG, nor sulfuric acid. Surely the effort is better spent elsewhere.
What sort of industrial process is this? Where is it located?
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Panache
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Leave the trial batch overnight reassess your numbers (pH, etc)in the morning. Good general rule if contemplating that scale.
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