HydrogenFluoride
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Registered: 26-8-2024
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Resue of isopropanol from chlorophyll extraction
I have been extracting chlorophyll from grass lately, and when I finish with the solvent extraction, just end up boiling off the IPA. I am considering
setting up a condenser to collect the IPA as it boils off for reuse. Is the IPA contaminated? And if so, what can be done to clean it up?
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RU_KLO
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If you are going to reuse for the same purposes (Chlorophyll extraction) minor contamination should not be a problem.
Destilation is a good method for purifying (unless an Azeotrope exist with other solvent - but in this case theres only one solvent or maybe water).
At atmospheric condition, a binary mixture of 2-propanol (isopropyl alcohol, IPA)–water forms a homogeneous minimum-boiling azeotrope at 87.4–87.7
mass% and 80.3–80.4 °C [1].
So if you start with 99.9% IPA, you could end with 88% IPA - 12% water (water comes from atmosphere humidity / glassware humidity if open system /
glassware not dryied by heat)
So if water is not a problem, then there is no problem.
If you need better purfication, just redestilate the destilate.- NOTE; this will not break the azeotrope.
Not asked, but here is some reading material.
Also, if you are boiling/destilling alcohols is better to do it in a wel ventilated area and with a waterbath. DO NOT use open flame directly.
Attachment: alcohol extrantion Chlorophyll.pdf (376kB)
This file has been downloaded 54 times
[Edited on 27-8-2024 by RU_KLO]
Go SAFE, because stupidity and bad Luck exist.
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HydrogenFluoride
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Thank you for the added reading material, I did not know that Chlorophyll was being broken down by heating, and that would explain my low yields.
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