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Author: Subject: Performic in SS or PP/PE vessel?
angelhair
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[*] posted on 2-5-2008 at 18:45
Performic in SS or PP/PE vessel?

What's the chance of getting away with doing a performic in a stainless steel or PP/PE container.

I have used a SS probe and stirrer shaft with teflon paddle and SS nuts and bolts, never have I seen the slightest bit of corrosion on the steel although I realise the surface area is very small. But I think I can do it.

I even believe that a plastic container can handle contact with DCM for 24 hours at least once, usually I keep tempretures about 34 - 36 deg C. No reflux, but I don't know if the product would be contaminated.
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bio2
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[*] posted on 2-5-2008 at 18:55


316L will suffice. Peracetic has little effect on 18/18 SS. Formic acid itself will even eat Ni.

PP or PE is fine just keep the temp about 30 degrees below the transition temp.
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MagicJigPipe
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[*] posted on 2-5-2008 at 19:13


Why do you not want to use glass?



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angelhair
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[*] posted on 2-5-2008 at 19:20


Because I've broken all my 2L flasks, also I was curious to know. What do you mean by "transition temp"?
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[*] posted on 2-5-2008 at 19:50


Glass transition temperature of plastics is the indefinite melting point.
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