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Topic: Sudden polymerization during distillation  (Read 8679 times)

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Offline curiouscat

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Re: Sudden polymerization during distillation
« Reply #15 on: January 27, 2014, 01:24:28 PM »
Quote from: discodermolide on January 27, 2014, 12:53:23 PM
You could also eliminate HCl and get the aldehyde!

Which aldehyde do you mean?

This?
c1ccccc1CC=O

Probably not....


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Offline curiouscat

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Re: Sudden polymerization during distillation
« Reply #16 on: January 27, 2014, 01:25:34 PM »
Quote from: discodermolide on January 27, 2014, 01:23:27 PM
Sure adding a diluent would be good, I come back to the carbowax 400 which we used for our mol dest.

Thanks!  I'll suggest that!
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Offline discodermolide

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Re: Sudden polymerization during distillation
« Reply #17 on: January 27, 2014, 01:28:49 PM »
Yes that aldehyde could be formed by HCl elimination to give the enol of that aldehyde.
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Offline curiouscat

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Re: Sudden polymerization during distillation
« Reply #18 on: January 27, 2014, 01:56:45 PM »
Quote from: discodermolide on January 27, 2014, 01:28:49 PM
Yes that aldehyde could be formed by HCl elimination to give the enol of that aldehyde.

Ah! I see. Thanks again.
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Offline orgopete

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Re: Sudden polymerization during distillation
« Reply #19 on: January 27, 2014, 02:51:44 PM »
Quote from: discodermolide on January 27, 2014, 12:19:08 PM
Do you have DSC data for the components and the mixture?

I agree with Disco on this point. Because this is outside of my expertise, I don't know, but is there literature data on the components?
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Offline Enthalpy

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Re: Sudden polymerization during distillation
« Reply #20 on: January 30, 2014, 03:30:05 PM »
Quote from: curiouscat on January 27, 2014, 12:47:15 PM
One part still puzzles me: Could any of this form free water?

May I suggest the polymer in the first post, but with some oxygen less in the main chain, and some cross-links between the chains, the hydrogen freed by cross-links building water together with the oxygen? The heat of this reaction is 130kJ more favourable than making chlorostyrene.
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