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Chemistry Forums for Students => Analytical Chemistry Forum => Topic started by: SarahS84 on May 06, 2021, 04:40:01 PM

Title: Dimethyl Ether evaporating question
Post by: SarahS84 on May 06, 2021, 04:40:01 PM

Hi can anyone help I have a recipe I'm about to try involving Dimethyl Ether, Heptane, Methanol, Ethyl alcohol and water, I have two questions.
Dimethyl ether is water soluble but being a gas that evaporates quickly (as its boiling point is -24 celcius) will this no longer evaporate if its dissolved in water and the solution is exposed to air? the total solution will be about 70% water.
secondly I'm using a gas washing bottle to mix it into the water, will it make any difference in the order of mixing the Dimethyl ether, either with the water first or the other ingredients?
Thanks in advance
Sarah

Title: Re: Dimethyl Ether evaporating question
Post by: ACETAT on May 07, 2021, 04:08:50 AM

For which purpose is it. The soloubilty is poor .
Beside the ether also heptane will not be solved.
It will evaporate out of the water.
Probably it helps if other solvents in the water that soloubility is better.

Title: Re: Dimethyl Ether evaporating question
Post by: SarahS84 on May 07, 2021, 10:08:27 AM

thanks for your reply!
Ah I see, its ingredients for a solution for helping bond textile ink to fabrics, its sprayed over the fabric then dried and allows ink to be printed on. There's meant to be only 1% heptane used around 10% Dimethyl Ether. Using a large amount of Ethanol say around 40% would this be enough to stop them evaporating from the water?