pneumatician
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Commercial for labs GAA
hi,
how is made the Glacial Acetic acid you can buy in a labstore in bottles of 1l??
ok the bath is maybe 10000 liters but how is made the GAA?? what process???
maybe making verdigris and distilling it??
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paulll
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Mood: It's fine. Really.
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https://m.lookchem.com/Chempedia/Chemical-Technology/Organic...
Mostly from carbonylation of methanol - which in turn comes from methane from dead dinosaurs.
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pneumatician
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wow! I was afraid of this shit! inclusive the GAA Pharma grade?
delirious!!!
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Texium
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Thread Moved
7-8-2022 at 12:56 |
PirateDocBrown
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That's right, Cativa process is the main industrial route. Iridium carbonyl iodide catalyst,
Methanol + carbon monoxide in, acetic acid out.
https://www.sciencedirect.com/science/article/abs/pii/S09205...
Phlogiston manufacturer/supplier.
For all your phlogiston needs.
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pneumatician
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And what is the actual process to produce HCL, pharma... grade???
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Tsjerk
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Burning hydrogen with chlorine.
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pneumatician
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and from where appear Fe, Hg, As... impurities???
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Texium
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They don’t. When HCl is made it’s extremely pure. In the case of laboratory/pharma or food grade stuff, it generally stays that way. If there’s
iron impurities in technical grade stuff, it will have been introduced by how it was handled in the factory: possibly transferred through pipes or
stored in tanks that are not impervious to HCl, and allow a small amount of iron to enter the solution. As for mercury and arsenic, I’ve got no clue
why you’d think to suspect those as contaminants.
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pneumatician
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Because I read the "Certificate of Analysis"???
I expected a reply like this... I think people in factories not are so stupid to run megapure HCL through rusted iron pipes, or no? 
the problem is here:
https://www.instrument-solutions.com/wp-content/uploads/Cert...
ridiculous quantities but from where come from near all the periodical table of elements here???
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unionised
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Dust; the glass from which the bottle is made, all sorts of things.
It's very difficult to maintain that degree of purity and, therefore, very expensive.
If your customer doesn't care if there's a little iron in the product then why not use steel equipment- it's cheap.
More realistically, you use equipment that's made of glass or plastic.
But those were moulded in steel.
Incidentally, cheap HCl is made as a by-product of chlorination of organics (e.g. making CH2Cl2) or from the reaction of salt with sulphuric acid.
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Tsjerk
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The reaction containers used to burn hydrogen with chlorine are made out of either iron or titanium. They could probably be made out of something that
doesn't contaminate the HCl, but apparently changing the reaction chamber by the time it is degraded, and distillation of the acid when needed for
purity is cheaper.
[Edited on 12-10-2022 by Tsjerk]
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