Is there a safety risk associated with vaporizing xylene?
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This post was last edited by WSL01218 on 2010-12-6 at 12:25. Question: When using xylene as a reflux solvent in the production of alkyd resins, the final temperature of the reaction is 270–280 degrees. To remove the xylene, should vacuum be applied at this temperature, or is it safer to lower the temperature first? After pumping, it is immediately vented; air enters the reactor rapidly – is this dangerous? Are there any safety hazards?
Firstly, using vacuum extraction for xylene vapor can easily lead to explosions in the exhaust gases from the vacuum pump; it is necessary to take proper measures to prevent explosions in these exhaust gases； Secondly, xylene belongs to the category of flammable and explosive solvents, with a flash point of 25–29 degrees; therefore, after pumping it out, it is necessary to use an inert gas to evacuate the area, as allowing air to enter the reaction vessel is extremely dangerous!
Can it be emptied with carbon dioxide?