Sealing PHOSGENE
Sealing PHOSGENE
(OP)
Can Teflon (PTFE) be used for sealing PHOSGENE (i hope the spelling is correct)?
Can anyone recommend a suitable rubber compound that can do the job too?
Can anyone recommend a suitable rubber compound that can do the job too?





RE: Sealing PHOSGENE
Best regards
Morten
RE: Sealing PHOSGENE
http://www.accessconnect.com/loctite_threadlocker_.htm
RE: Sealing PHOSGENE
PHOSGENE (Formula: CCl2O; Density: 3.4 kg/m3; Molecular Weight: 98.92; CAS Registry Number: 75-44-5), also called "Carbonyl chloride" or "Chloroformyl chloride", is a very dangerous and toxic gas: it was also used for chemical attacks during the Ist World War!
For the relevant "safety card", see:
http://www.ilo.org/public/english/protection/safework/cis/products/icsc/dtasht/_icsc00/icsc0007.htm
The problem of sealing and "fugitive" emissions is very critical when dealing with such a fluid... so I agree with MortenA: take this only as indicative, the issue is worth of more study!
Anyway, regarding the compatibility of PTFE, a catalogue of a sealing materials' Manufacturer (Angst+Pfister), for example, tells me that it is good with liquid phosgene (i.e. below 8°C at ambient pressure); Cloroprene (Neoprene) and fluorinate rubber (VitonTM) also show a good behaviour.
Phosgene gas is not mentioned... may be because the prefer to be directly consulted in such delicate cases.
Hope this helps, 'NGL
RE: Sealing PHOSGENE
RE: Sealing PHOSGENE
http://www.dupont-dow.com/Header/index.asp
http://www.gtweed.com/GTIntro.htm
RE: Sealing PHOSGENE
please take a look at Thread798-95255: chemical process Engineers seem to disagree with your judgement about PTFE in this service... I'm a bit confused
Bye, 'NGL