Sciencemadness Discussion Board
Not logged in [Login ]
Go To Bottom

Printable Version  
 Pages:  1  2
Author: Subject: HEET as a source for methanol
SuperOxide
National Hazard
****




Posts: 360
Registered: 24-7-2019
Location: Devils Anus
Member Is Offline


[*] posted on 7-11-2021 at 12:32


Quote: Originally posted by monolithic  
I noticed the same impurity in Heet, but it never seems to come over in distillation. No idea what the impurity is, it doesn't show up on this NMR: https://ilrc.ucf.edu/sample_detail.php?sample_id=443


Never came out over distillation? Interesting. I did a fraction distillation and basically only kept what came over at 64.0-64.9 °C. Not much came over under that, and when it rose above that I just stopped it and let the rest evaporate. Which is what was in the above pic.

What range did you keep?




View user's profile View All Posts By User
monolithic
National Hazard
****




Posts: 424
Registered: 5-3-2018
Member Is Offline

Mood: No Mood

[*] posted on 8-11-2021 at 05:40


Quote: Originally posted by SuperOxide  
Quote: Originally posted by monolithic  
I noticed the same impurity in Heet, but it never seems to come over in distillation. No idea what the impurity is, it doesn't show up on this NMR: https://ilrc.ucf.edu/sample_detail.php?sample_id=443


Never came out over distillation? Interesting. I did a fraction distillation and basically only kept what came over at 64.0-64.9 °C. Not much came over under that, and when it rose above that I just stopped it and let the rest evaporate. Which is what was in the above pic.

What range did you keep?


Tbh I don't pay attention to the endpoint. I know Heet is pretty clean out of the bottle, so it's usually just a simple distillation: discard the first 10 ml or so and leave 10-20 ml at the tail end because I'm paranoid about distillation to dryness.
View user's profile View All Posts By User
Morgan
International Hazard
*****




Posts: 1557
Registered: 28-12-2010
Member Is Offline

Mood: No Mood

[*] posted on 8-11-2021 at 18:16


That was interesting seeing the remaining residue/gunk in Heet after distillation. I wonder if the additive(s) is/are a corrosion inhibitor or something to protect elastomers from degrading or both or yet some other additive purpose? Or simply a byproduct from the manufacturing process.

Other thoughts ...
Maybe oxygen is synergistic in some way with Heet even when highly diluted by adding it to a tank of gas in a car.
"Oxygen is more soluble in methanol than it is in water. Methanol can contain up to 40 mg/L of dissolved oxygen at 25°C." Fresh water right at 0 C will hold 14.6mg/L and at 25 C 8.2mg/L.
https://www.fondriest.com/environmental-measurements/paramet...
https://onepetro.org/NACECORR/proceedings-abstract/CORR07/Al...


[Edited on 9-11-2021 by Morgan]
View user's profile View All Posts By User
macckone
International Hazard
*****




Posts: 2126
Registered: 1-3-2013
Location: Over a mile high
Member Is Offline

Mood: Electrical

[*] posted on 10-11-2021 at 14:21


heet is industrial grade methanol, it is supposed to leave zero residue after ignition in a gasoline or diesel engine. So there could be hydrocarbons in it. Possibly as a lubricant. Maybe an emulsifier in case there is too much water in the tank.
View user's profile View All Posts By User
 Pages:  1  2

  Go To Top