Assume atmospheric pressure. Is there a way I could create a liquid compound (not necessarily water but water would be preferred) that would boil at very specific points by adding another chemical or compound to it. If so does anyone know what chemicals I would be using? Looking for temps up to about 300 degrees.
Assuming the water can absorb enough, the right quantity of salt should be able to raise it up to 300.
Also, 300 C or F?
Edit: Turns out it takes a lot of salt to raise the boiling point of water by a very small amount. So probably not salt.
Maybe try mixing in ethylene glycol (antifreeze), it appears to have a boiling point of 386.6F on it’s own.
Pure (98.2%) glycerol boils at 290 °C (554 °F). To lower that to a specific point, just add the appropriate amount of water.
I should have thought of that, spent my life as a mechanic.
Excellent!!! Thank you.
But I assume you’re aware that if you have a mixture of two liquids, although the boiling point will be intermediate, more of the component with the lower boiling point will boil off, changing the composition of the remaining mixture and thus steadily raising the boiling point of the mixture.
You have to scroll down a bit, but there’s a table of boing points for the binary mixture here:
It’s not very granular though.
I’ve got a candy recipe similar to this one, which tells you to boil a mix of corn syrup, sugar, and/or water while you monitor the temperature, which changes over time as the water evaporates. The recipe tells you to stop boiling when the temperature hits a predetermined value, at which point the water content is at the desired level.
Nitpick: This is essentially correct with the caveat viz-a-viz of azetropes. You can get a azetrope of two different liquids where this will not happen. The composition of the vapor will be the same as the liquid and hence you cannot separate them by traditional distillation. For example, you cannot make pure ethyl alcohol by traditional distillation.
I was wondering about that. This would be going for about 24 hours at a time so it would be an issue.
Please check the azetropes above, you can pick one that suits your need. If you are using this to treat your bows, please note that the water coming out of the wood would change the concentration and hence the boiling point.
The other option is to use pressure control (please understand the risks of doing this). You will need about 15 psig pressure to change the water boiling temperature to 300F. Please have a relief valve in the system.
You can also look into a silicone oil bath which stays liquid to about 360F. You can control the temperature with an electrical controller.
I did plan on using this to heat treat the wood for the bows. What I had in mind was something that could be used in a remote campsite. I could use a thermometer and add water as it boiled off based on the temps I was getting. We still have a lot of experimenting to do as to what are optimum times and temps to heat treat this wood for maximum performance.