DMT-Nexus member
Posts: 752 Joined: 19-Mar-2009 Last visit: 15-Jun-2019 Location: green heart of caribou
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yeah, i am sure i never got above 99.% ish. my meter was 0-100. the good ones read 190-200 proof scale, so much more accurate. the ones i found were made in germany for about 300usd. is it really necessary to get absolute absolute for your purposes?
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Oz
Posts: 144 Joined: 01-Jun-2010 Last visit: 27-Apr-2011 Location: Oz
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you may find h2so4 a bit sheepish for this. look for more recent data since the alchemist. i may be thinking of d-11 or something else related. i know ive read sulf everywhere but i also read it doesnt work for one of the things it sposed to
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analytical chemist
   
Posts: 7463 Joined: 21-May-2008 Last visit: 03-Mar-2024 Location: the lab
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h2so4? maybe if you're trying to make Et2O. "Nothing is true, everything is permitted." ~ hassan i sabbah
"Experiments are the only means of attaining knowledge at our disposal. The rest is poetry, imagination." -Max Planck
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DMT-Nexus member
Posts: 154 Joined: 03-May-2010 Last visit: 18-Dec-2013 Location: Under the sea
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Vogel's Practical Organic Chemistry 5th ed. wrote:Dehydration of rectified spirit by calcium oxide. Pour the contents of a Winchester bottle of rectified spirit [azeotropic mixture] (2-2.25 litres) into a 3-litre round-bottomed flask and add 500 g of calcium oxide which has been freshly ignited in a muffle furnace and allowed to cool in a desiccator. Fit the flask with a double surface condenser carrying a calcium chloride guard-tube, reflux the mixture gently for 6 hours (preferably using a heating mantle) and allow to stand overnight. Reassemble the condenser for downward distillation via a splash head adapter to prevent carry-over of the calcium oxide in the vapour stream. Attach a receiver flask with a side-arm receiver adapter which is protected by means of a calcium chloride guard tube. Distil [sic] the ethanol gently discarding the first 20 ml of the distillate. Preserve the absolute ethanol (99.5%) in a bottle with a well fitting stopper. 99.8% ethanol can also be achieved, and its drying procedure can be retrieved from the same source. The text above was typed by frenzy monkeys randomly hitting their keyboards.
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analytical chemist
Posts: 7463 Joined: 21-May-2008 Last visit: 03-Mar-2024 Location: the lab
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well i'll be damned.. interesting. "Nothing is true, everything is permitted." ~ hassan i sabbah
"Experiments are the only means of attaining knowledge at our disposal. The rest is poetry, imagination." -Max Planck
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Boundary condition
Posts: 8617 Joined: 30-Aug-2008 Last visit: 07-Nov-2024 Location: square root of minus one
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So here's the magnesium alkoxide (magnesium/iodine) method for preparing ultra-dry ethanol: "Add magnesium (5 g) to 50 mL alcohol in a 2 L round bottomed flask. Add 0.5 g of iodine and heat to reflux until the iodine color has disappeared. Be ready to remove the source of heat if the reaction becomes too vigorous. Make up the mixture to 1 L with alcohol and reflux for 1/2 h with protection from the atmosphere. Distil and use the dry alcohol immediately." This also works for methanol and propanols. From Harwood and Moody, "Experimental Organic Chemistry", Blackwell Science 1989-1996, p.743. “There is a way of manipulating matter and energy so as to produce what modern scientists call 'a field of force'. The field acts on the observer and puts him in a privileged position vis-à-vis the universe. From this position he has access to the realities which are ordinarily hidden from us by time and space, matter and energy. This is what we call the Great Work." ― Jacques Bergier, quoting Fulcanelli
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Oz
Posts: 144 Joined: 01-Jun-2010 Last visit: 27-Apr-2011 Location: Oz
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benzyme, im pretty sure this guy is trying to do the cannabis alchemist's isomerization tek. IIRC the alchemist states a 5% solution of h2so4 +hash oil in anhydrous ethanol refluxed for 9hrs or so. i cant find my pdf tho so i may be remembering wrong. i also remember reading on bl or the collective that it wont work with sulfuric unless a proper catalyst is used or something. i really cant remember.
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analytical chemist
Posts: 7463 Joined: 21-May-2008 Last visit: 03-Mar-2024 Location: the lab
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a friend successfully did that same procedure, didn't say anything about using anhydrous ethanol. "Nothing is true, everything is permitted." ~ hassan i sabbah
"Experiments are the only means of attaining knowledge at our disposal. The rest is poetry, imagination." -Max Planck
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Oz
Posts: 144 Joined: 01-Jun-2010 Last visit: 27-Apr-2011 Location: Oz
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ah, then i dunno why the OP would want thit for that stated reason. unless he needs it for 1-aco-thc production which does require it but falls beyond out locally allowed speach on synth.
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analytical chemist
Posts: 7463 Joined: 21-May-2008 Last visit: 03-Mar-2024 Location: the lab
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yea, there's really no need to use anhydrous ethanol for anything but synth. even denatured alcohol can be used for extractions, just don't use it to make a tincture. "Nothing is true, everything is permitted." ~ hassan i sabbah
"Experiments are the only means of attaining knowledge at our disposal. The rest is poetry, imagination." -Max Planck
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