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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?



"There must be no barriers to freedom of inquiry ... There is no place for dogma in science. The scientist is free, and must be free to ask any question, to doubt any assertion, to seek for any evidence, to correct any errors. ... We know that the only way to avoid error is to detect it and that the only way to detect it is to be free to inquire. And we know that as long as men are free to ask what they must, free to say what they think, free to think what they will, freedom can never be lost, and science can never regress." -J. Robert Oppenheimer
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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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