DraconicAcid
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Isolating adipic acid
Adipic acid is fairly soluble in water, and I'm trying to think of a way to get it out of solution without resorting to liquid-liquid extraction
(which I don't have the glassware for). Anyone know if there are any insoluble salts of this acid?
Please remember: "Filtrate" is not a verb.
Write up your lab reports the way your instructor wants them, not the way your ex-instructor wants them.
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plante1999
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I guess calcium would do the trick, as it generally form insoluble salt with organic acids, but I may be wrong.
I never asked for this.
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DraconicAcid
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Calcium adipate was the one ion that I was able to find out is soluble in water.
There's a patent online that states " Unlike succinic acid, calcium succinate is relatively insoluble in water when compared with calcium adipate.
Calcium succinate has a solubility at 25° C. of only 1.26%, and the solubility at this temperature is a peak solubility with lower solubilities at
higher and lower temperatures. "
http://www.freepatentsonline.com/4423018.html
Please remember: "Filtrate" is not a verb.
Write up your lab reports the way your instructor wants them, not the way your ex-instructor wants them.
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Magpie
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I can't answer your question directly, but here's some forum experience making adipic acid in case you haven't seen it:
http://www.sciencemadness.org/talk/viewthread.php?tid=3173#p...
I made mine using a procedure in Brewster (1961). Here's the applicable excerpt:
"Acidify the hot filtrate with con HCl and allow it to stand in a bath of ice water for 15-20 minutes. Collect the crystals of adipic acid by suction
filtration...."
The expected yield was 3g. I did a double batch and obtained 6.2g. I used 10.6mL of cyclohexanone. So you can calculate my yield if desired.
The single most important condition for a successful synthesis is good mixing - Nicodem
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DraconicAcid
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Yeah, the standard prep is either from permanganate, or from hot nitric acid (this has gone volcano on me more than once). I wanted to try to bleach
oxidation of an alcohol, and it seemed that adipic acid would be the easiest product to isolate....until I realized how much solution it would take.
Bother.
A few patents claim that it can be precipitated as a urea adduct....hmmm.
http://www.google.com/patents/US4146730
[Edited on 26-6-2013 by DraconicAcid]
Please remember: "Filtrate" is not a verb.
Write up your lab reports the way your instructor wants them, not the way your ex-instructor wants them.
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bfesser
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<em>Seriously</em>, you don't have two beakers‽
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DraconicAcid
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Well, I don't have a sep funnel.
<!-- bfesser_edit_tag -->[<a href="u2u.php?action=send&username=bfesser">bfesser</a>: removed
unnecessary quoting]
[Edited on 7/8/13 by bfesser]
Please remember: "Filtrate" is not a verb.
Write up your lab reports the way your instructor wants them, not the way your ex-instructor wants them.
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DraconicAcid
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Sorry, guys- I just remembered that work-related stuff is forbidden from sciencemadness, and this is meant towards a lab I'm developing for my
students. Feel free to close the thread.
Please remember: "Filtrate" is not a verb.
Write up your lab reports the way your instructor wants them, not the way your ex-instructor wants them.
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Random
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Take a narrow and tall measuring cylinder and use a syringe to suck out the layer.
<!-- bfesser_edit_tag -->[<a href="u2u.php?action=send&username=bfesser">bfesser</a>: removed
unnecessary quoting]
[Edited on 7/8/13 by bfesser]
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Dr.Bob
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Quote: Originally posted by DraconicAcid  | | Sorry, guys- I just remembered that work-related stuff is forbidden from sciencemadness, and this is meant towards a lab I'm developing for my
students. Feel free to close the thread. |
I wouldn't think that items of more general interest would be a problem here, but the site http://www.chemicalforums.com/ does have a lot of questions relating to teaching labs, graduate work, and work related questions, if that helps.
It is a similar site with a different mix of threads, but nicely complementary to this forum.
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sonogashira
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You seem to have lost interest, but lead adipate is insoluble, if it is of any use to someone else: http://link.springer.com/article/10.1007/BF02641149
http://www.sciencedirect.com/science/article/pii/00399140688...
[Edited on 28-6-2013 by sonogashira]
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