organicchemist25
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Iron filings mesh size
I am looking to buy some iron filings and it has been a small challenge. The companies will either not sell to me, the filings are not lab quality
(for magnetism demos), or the mesh size it not what my reaction calls for.
So, my question is, if i need 80 mesh size iron filings can I get away with 40-50 mesh?
I know it is larger than what I am looking for, but just wanting to ask.
Will it work or not? Would you please provide a little explanation either way? I am not sure if surface area place a role, well a determining factor
anyways.
[Edited on 26-7-2014 by organicchemist25]
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TheChemiKid
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What reaction are you attempting?
When the police come
\( * O * )/ ̿̿ ̿̿ ̿'̿'̵͇̿̿з=༼ ▀̿̿Ĺ̯̿̿▀̿ ̿ ༽
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Zephyr
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If this is the only purpose of the fillings, I do not think the size of the fillings will matter very much, and neither will any small impurities.
Also, if the impurities are not magnetic, they can be separated easily using a magnet to skim off the iron.
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TheChemiKid
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That is not the purpose, that is just the purpose of some of the filings being sold.
When the police come
\( * O * )/ ̿̿ ̿̿ ̿'̿'̵͇̿̿з=༼ ▀̿̿Ĺ̯̿̿▀̿ ̿ ༽
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organicchemist25
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o-toluidine
Fe + HCl + C7H7NO2 ------> C7H9N (omitted bi-products and balancing)
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aga
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File some iron yourself ?
Yes, it is tedious work, yet it yeilds iron filings.
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organicchemist25
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I have thought about that, but wouldn't I need something to mill it with to get it down that "fine" ? If, it is not that complicated to get it that
small, I am definitely interested in doing so.
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organicchemist25
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Any techniques to possibly share on getting it that small in microns? I have a super fine metal file to get started.
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Magpie
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I know that several procedures for the reduction of nitro groups to amine groups call for iron filings. They are touted to be the most efficient and
economical. I have not had good luck with them. My problem was that they are so heavy that they are hard to keep in suspension. Also they make
glassware cleanup a real pain. Instead, I highly recommend using tin shot. (I have seen tin available at Wal-mart as fishing weight.)
If you do use Fe I recommend getting it quite fine and use of strong mechanical stirring.
The single most important condition for a successful synthesis is good mixing - Nicodem
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organicchemist25
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I know this is an old thread, but you have personally had good results with tin in place of iron, Magpie? Also, would I file down the tin shot with a
super fine file? I have some of those.
Thanks for all your feedback, Magpie! I learn things from you you always have
nice, detailed threads on your experiments.
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Loptr
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Sodium dithionite is another good reagent for reducing nitro groups to amino groups.
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