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CHRIS25
National Hazard
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Hopefully last question then not to bother you again. I read from wikpedia that oleic is an oily lard like substance. I see a couple of commercial
sites where it is sold as a liquid. So my question is how do they store oleic acid as a liquid, I just dissolved some in ethanol, but is this good
for my purposes, for example when asked to use 5mLs, if I mix stoichiometric amounts with ethanol to get a correct solution? Or keep it in the
fridge, as is at the moment where it is hard, and melt the mLs that I require? Sorry about these basic questions, but reading and studying the theory
behind fatty acids and structures unfortunately does not help me with the practical issue at this moment in time. Thanks.
[Edited on 17-4-2014 by CHRIS25]
[Edited on 17-4-2014 by CHRIS25]
‘Calcination… is such a Separation of Bodies by Fire, as makes ‘em easily reducible into Powder; and for that reason ‘tis call’d by some
Chymical Pulverization.’ (John Friend, Chymical Lectures London, 1712)
Right is right, even if everyone is against it, and wrong is wrong, even if everyone is for it. (William Penn 1644-1718)
The very nature of Random, Chance development precludes the existence of Order - strange that our organic and inorganic world is so well defined by
precision and law. (me)
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deltaH
Dangerous source of unreferenced speculation
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I enjoy discussing experimental problems, so DO bother again.
You can work out the weight of 5ml oleic acid from it's liquid density and then simply cut and weigh that from your semi-solid. The solid will
dissolve in your parrafin when you add it. If you're following a ferrofluid procedure, then best not to change it if you can, for this reason I
wouldn't recommend alcoholic solutions, unless the recipe calls for it.
As for the liquid commercial products, I think they are much purer and so melt close to their literature value (13-14C). It should only be lard like
if stored cold!
Remember your product contain appreciable amounts of both polyunsaturated fatty acids as well as saturated ones. That really messes up the phase
behaviour, probaby why you don't get a hard lard like phase when cold nor melting promptly above 14C.
[Edited on 17-4-2014 by deltaH]
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CHRIS25
National Hazard
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Yes ok I understand. Unfortunately I posted a new thread regarding this paraffin problem I have. It is in the beginners section because I felt, as a
beginner, i should not really continue in the organic section where I think mostly very intelligent people reside asking very intelligent
questions . I would not mind if you could, when moments allow, take a look for me.
‘Calcination… is such a Separation of Bodies by Fire, as makes ‘em easily reducible into Powder; and for that reason ‘tis call’d by some
Chymical Pulverization.’ (John Friend, Chymical Lectures London, 1712)
Right is right, even if everyone is against it, and wrong is wrong, even if everyone is for it. (William Penn 1644-1718)
The very nature of Random, Chance development precludes the existence of Order - strange that our organic and inorganic world is so well defined by
precision and law. (me)
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deltaH
Dangerous source of unreferenced speculation
Posts: 1663
Registered: 30-9-2013
Location: South Africa
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Mood: Heavily protonated
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I have tons of threads in beginners too. Also, many of these 'intelligent' questions have nothing to do with intelligence  I'll try to contribute as soon as I can, just a little swamped with so many things
of late!
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CHRIS25
National Hazard
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Thankyou
‘Calcination… is such a Separation of Bodies by Fire, as makes ‘em easily reducible into Powder; and for that reason ‘tis call’d by some
Chymical Pulverization.’ (John Friend, Chymical Lectures London, 1712)
Right is right, even if everyone is against it, and wrong is wrong, even if everyone is for it. (William Penn 1644-1718)
The very nature of Random, Chance development precludes the existence of Order - strange that our organic and inorganic world is so well defined by
precision and law. (me)
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CHRIS25
National Hazard
Posts: 951
Registered: 6-4-2012
Location: Ireland
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Oleic acid
Is my Oleic acid able to be purified via a simple distillation? I can only seem to discover that it can't due to the presence of other
polyunsaturated fatty acids. But these commercial papers are dealing with complex stuff so I am not sure whether this applies to my humble
conglomeration.
‘Calcination… is such a Separation of Bodies by Fire, as makes ‘em easily reducible into Powder; and for that reason ‘tis call’d by some
Chymical Pulverization.’ (John Friend, Chymical Lectures London, 1712)
Right is right, even if everyone is against it, and wrong is wrong, even if everyone is for it. (William Penn 1644-1718)
The very nature of Random, Chance development precludes the existence of Order - strange that our organic and inorganic world is so well defined by
precision and law. (me)
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gdflp
Super Moderator
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That would depend on how good your hot plate is. Oleic acid boils at 360°C so it would require a long time to heat up to temperature to distill it,
basically it's similar to sulfuric acid in the fact that it's nonvolatile. That's just assuming that your oleic acid is pure, I'm not sure about
azeotropes or other fatty acids.
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UnintentionalChaos
International Hazard
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Very unlikely. That is a very high temperature. Methyl oleate would be a better intermediate and I still wouldn't try without at least aspirator
strength vacuum. For ferrofluid, I wouldn't bother at all. The crude mix of fatty acids should be quite sufficient as a surfactant.
I now make soap as a small business...would you guys like me to throw together a quick writeup on how to go from olive oil to mixed fatty acids in 2
hours, tops?
In return, does anyone have a reliable ferrofluid writeup? I have seen a lot of preparations that vary pretty widely and am not sure which would work
best.
[Edited on 5-26-14 by UnintentionalChaos]
Department of Redundancy Department - Now with paperwork!
'In organic synthesis, we call decomposition products "crap", however this is not a IUPAC approved nomenclature.' -Nicodem
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CHRIS25
National Hazard
Posts: 951
Registered: 6-4-2012
Location: Ireland
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Thankyou that was it. Unintentional chaos: have you seen this: http://www.youtube.com/watch?v=kPwIeoMFjJE I have seen a lot of rubbish but this is professionally presented and involves making everything.
‘Calcination… is such a Separation of Bodies by Fire, as makes ‘em easily reducible into Powder; and for that reason ‘tis call’d by some
Chymical Pulverization.’ (John Friend, Chymical Lectures London, 1712)
Right is right, even if everyone is against it, and wrong is wrong, even if everyone is for it. (William Penn 1644-1718)
The very nature of Random, Chance development precludes the existence of Order - strange that our organic and inorganic world is so well defined by
precision and law. (me)
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