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Specialty Chemistry Forums => Citizen Chemist => Topic started by: Blue Humour on December 18, 2015, 05:59:35 AM

Title: Storing Solvents at Elevated Temperatures
Post by: Blue Humour on December 18, 2015, 05:59:35 AM

I would like to store Acetone in a sealed paint tin at 40C. Should I be worried about pressure build up?

I'm stuck on how to figure out whether this is an explosion risk...

Title: Re: Storing Solvents at Elevated Temperatures
Post by: billnotgatez on December 20, 2015, 04:30:02 AM

Does the paint can have a screw top or press down lid?


Just some information
From WIKI
https://en.wikipedia.org/wiki/Acetone (https://en.wikipedia.org/wiki/Acetone)
For Acetone
Boiling point
56–57 °C; 133–134 °F; 329–330 K
Vapor pressure
9.39 kPa (0 °C)
30.6 kPa (25 °C)
374 kPa (100 °C)
2.8 MPa (200 °C)

From elsewhere on the Internet base on GOOGLE search

Quote

acetone vapor pressure calculator

http://www.ddbst.com/en/EED/PCP/VAP_C4.php (http://www.ddbst.com/en/EED/PCP/VAP_C4.php)
I estimate vapor pressure of acetone at 40 °C
is about  46 kPa

And from WIKI
https://en.wikipedia.org/wiki/Atmospheric_pressure (https://en.wikipedia.org/wiki/Atmospheric_pressure)
sea level standard atmospheric pressure    101.325 kPa

Title: Re: Storing Solvents at Elevated Temperatures
Post by: discodermolide on December 20, 2015, 06:57:46 AM

Quote from: Blue Humour on December 18, 2015, 05:59:35 AM

I would like to store Acetone in a sealed paint tin at 40C. Should I be worried about pressure build up?

I'm stuck on how to figure out whether this is an explosion risk...

How much acetone?, Size of container?
Generally solvents should be stored at room temperature or below. With acetone at 40°C you are only 16°C below the boiling point so I would say that you can expect a significant pressure build up.

So this is a safety risk. Expect significant degassing if you open the tin, this could cause a static discharge and hence an explosion.