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aga
Forum Drunkard
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So the pH adjustment did nothing, worked perfectly, or did not work, or simply was not attempted ?
There are far too many of these kind of things on SM these days.
Either you're ACTUALLY doing an experiment or you're not.
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clearly_not_atara
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According to this patent:
http://www.google.tm/patents/US2801271
O-xylene and m-xylene are tert-butylated by isobutylene in the presence of acids, whereas p-xylene is not, probably due to the lack of an unhindered
position on p-xylene. It should be possible to take advantage of this in a "wet" process using e.g. pinene or another 1,1-disubstituted alkene which
is liquid at stp. If the goal is to obtain p-xylene, you're done at this point.
Then o-phthalic acid may be separated from m-phthalic acid by production of the anhydride, correct? Or maybe not?
[Edited on 30-12-2017 by clearly_not_atara]
[Edited on 04-20-1969 by clearly_not_atara]
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JJay
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Does anyone know how much o-xylene is actually contained in commercial solvent xylene (e.g. Klean Strip)?
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mackolol
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@Aga; I am attempting this experiment as i said my last attempt was hydrolysing m xylene sulphonic acid under reflux and yes i added hcl to my
previous attempt but nothing happened. Do i have to add it to this one too and reflux again? Or add more sulph acid to 50% cause now its strength is
something around 12.26%. Now my goal is to get phthalic acid and M xylene in pure form because i want to use it in lidocaine synthesis. I dont need p
xylene in any form because i dont know what to do with this.
@JJay; i think its m xylene- 60% o xylene- 20% p xylene- 20% in chemical grade but as solvent in Poland o xylene is 0.6% so too small to do do
anything. I think thats because it is most worth isomer. You can go to builder shop and check msds of any xylene solvent you have there.
[Edited on 31-12-2017 by mackolol]
[Edited on 31-12-2017 by mackolol]
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JJay
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The Klean Strip SDS doesn't really say: http://www.kleanstrip.com/uploads/documents/GXY24_SDS-LL44.p...
Is there a better one somewhere?
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