Looking for a liquid or brine to be liquid at -120 ¦C 2

[pardal]

For a experiment I need a brine or liquid to be liquid at 120 °C .
Liquid gas , as air , oxigen or nitrogen is out of reach.

Maybe a combustion gas as propane or butane.

Of course safety is a concern , but it will be under good safety conditions.




Pardal

 

[25362]

What's the purpose of the exercise?
You can find in any chemical manual a plethora of liquids (organic and inorganic compounds) boiling above 120^oC at atmospheric pressure.
Safety, price, availability, corrosion, heat transfer capabilities, etc., etc., are considerations that may influence your selection.

 

[pardal]

Please pardon me I made a misstake
It is -120°C

Minus 120 degree centigrade.


Pardal

 

[moltenmetal]

We've used liquid propane as a heat transfer fluid before. Solidifies at -187 C. With the right safety precautions it works fine. You're just beyond the limit of, say, isopropanol slush with dry ice which is commonly used in the laboratory (without looking it up I seem to remember its limit being ~ -70 C)

 

[25362]

R122 is a halocarbon refrigerant (CAS RN 354-21-2) that would stay liquid at atmospheric pressure from about 70 down to -140^oC. Out of a series of laboratory solvents, with melting points/boiling points given in ^oC, one could consider as follows:

metyl cyclohexane -127/+101
2-methyl pentane -154/+60
pentane -130/+36
propyl alcohol -126/+97

For thermostatic baths one can also use:

isopentane -159/+28
allyl chloride -134/+45
allyl alcohol -129/+97

Again the preferred liquid would depend on a series of factors as mentioned above.

 

[pennpoint]

pardal
I am curious..
You did not answer 25362"s first post.. "Whats the purpose of the experiment (he said exercise)?"
My question is; if a material commonly used as a coolant such as liquid nitrogen is out of the question what is the chance that the coolants (refrigerants) suggested in "25362" second post will also out of the question. If you are in a location where the availability of some commodities are scarce, then you have a real problem.
I am aware that LN2 can be hard to come by in some countries but it still can be obtained.
What I see is your willingness to use very dangerous materials to perform a single experiment.
The cost of LN2 could be much less than the safety precautions necessary to protect the operators using other volatile materials.
Your post is very cryptic and therefore does not explain alot. I think there are people who monitor this forum who could help you achieve your goal if you would provide a little more information and thus create some interest in your cause.

I wish you well

pennpoint

 

[pardal]

Like I said on my post , it is a experiment at first, but with a production end.

The intention is to have a "energy" acumulated while runing a smal refrigeartion device , so when needed I can tranfer this energy in a short time.
The final product shall not have any consumible cost as Liquid Nitrogen.

It is because it is buy with a no retornable credit fund , so the only cost it is electrical power , that is shared on the building so no one will take care of it.

It is a incredible argument , but it so how it work here.

The propyl alcohol -126/+97 seem to be the best suited.
Where I can get the specific heat of liquid and the viscocity at such temperature near its melting point?

Please apologize me for not to give a wider explanation.

Hope you can help me.












Pardal

 

[pardal]

Hi, I found propanol , propyl alcohol , as a industrial solvent used by ink makers , so it will be the fluid I will use.
My concern is it's specific heat as liquid .
Do you know where I can find it??
Thanks for the past and post help.





Pardal

 

[pennpoint]

PARDEL

Go to these sites:

MSDS

http://www.jtbaker.com/msds/englishhtml/p6390.htm

Specific Heats at various temps.

http://www.basf.de/basf/img/produkte/loesemittel/e/n-Propanol_e.pdf

Good Luck

pennpoint