Re: Looking for molten salt composition

Roy Raveneau wrote:

* Melting point: below 700C (preferably much lower)
* Usable at up to 850C without emitting toxic fumes (MgCl2 is out. NaCl
too?)
* Safe to handle without special precautions when cold.
* Density above 2.4g/ml when liquid because there's some stuff I want
to float to the top.

Alkali metal chlorides mostly too light. CaCl is denser but unpleasant
to handle. CsCl is expensive. Alkali metal sulfates are about the right
density but have much higher melting points. The right eutectic
combination might work, though. Are they safe at these temperatures?

Any other ideas?

NaBr, mp = 747 C, bp = 1392 C
KBr, mp = 734 C, bp = 1383 C

NaI, mp = 662 C, bp = 1304 C
KI, mp = 685 C, bp = 1324 C

Do some mixed melting point curves for maximum depression vs. cost and
density. Bp won't care. Iodides slowly nuisance air oxidize.

--
Uncle Al
http://www.mazepath.com/uncleal/
(Toxic URL! Unsafe for children and most mammals)
http://www.mazepath.com/uncleal/qz3.pdf
.

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