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Registered Member #4201
Joined: Wed Nov 09 2011, 07:42AM
Location:
Posts: 20
Hey all, I understand that Potassium Chlorate's melting point is 356 °C and if i were to heat up potassium chlorate using a bunsen burner, how long does it take for it to turn into its molten state?
Also, once in molten state, what material can withstand its heat?
Registered Member #3414
Joined: Sun Nov 14 2010, 05:05PM
Location: UK
Posts: 4245
We probably need more information to help you here, but I'll try.
Metals and ceramics will withstand those temperatures easilt, for example, stainless steel.
I assume molten potassium chlorate will react with some of the alloying elements in stainless steel, but I don't know for sure, so a ceramic, or ceramic coated stainless steel, or ceramic coated metal container may be more suitable. (I've melted aluminium alloy in enamelled cooking pots before, melting point 600-800°C).
As for how long it would take to melt, you'd be much better off building some sort of furnace of kiln, eg using fire bricks or something to contain the heat. I regularly use the bricks from inside old storage heaters, with fireclay, for this purpose.
You can buy ceramic crucibles, etc. for this purpose. you may even have some lying around. What kind of quantities are you planning to melt?
Registered Member #4201
Joined: Wed Nov 09 2011, 07:42AM
Location:
Posts: 20
Ash Small wrote ...
We probably need more information to help you here, but I'll try.
Metals and ceramics will withstand those temperatures easilt, for example, stainless steel.
I assume molten potassium chlorate will react with some of the alloying elements in stainless steel, but I don't know for sure, so a ceramic, or ceramic coated stainless steel, or ceramic coated metal container may be more suitable. (I've melted aluminium alloy in enamelled cooking pots before, melting point 600-800°C).
As for how long it would take to melt, you'd be much better off building some sort of furnace of kiln, eg using fire bricks or something to contain the heat. I regularly use the bricks from inside old storage heaters, with fireclay, for this purpose.
You can buy ceramic crucibles, etc. for this purpose. you may even have some lying around. What kind of quantities are you planning to melt?
Hmmm, i would love to conduct this experiment: and connect the end of the test tube to a steam engine that needs at least 5 psi. And i hope to run the engine for more than 3 minutes with high speed. So, do you know about how long it takes to melt potassium chlorate?
Registered Member #3414
Joined: Sun Nov 14 2010, 05:05PM
Location: UK
Posts: 4245
Sophie Amelia wrote ...
Hmmm, i would love to conduct this experiment: and connect the end of the test tube to a steam engine that needs at least 5 psi. And i hope to run the engine for more than 3 minutes with high speed. So, do you know about how long it takes to melt potassium chlorate?
Well, it looks like that's a pyrex test tube he's using to melt it in.
As far as how long it will take, you just need to heat it up to the melting point, or a bit further. It depends on how much you are melting, how much energy (heat) you put in, and how fast it is cooling down, but it shouldn't take long to melt a small amount in a test tube.
Registered Member #4201
Joined: Wed Nov 09 2011, 07:42AM
Location:
Posts: 20
Conundrum wrote ...
Well sodium chloride (very similar) does melt.
-A
Thanks for the idea :) But i think its sodium chlorate instead of sodium chloride. It has a lower melting point of 248 °C which is better i guess. Hmmm... but i will have to check if my country allows me to buy it.
Registered Member #4201
Joined: Wed Nov 09 2011, 07:42AM
Location:
Posts: 20
[/quote1321609764]
Well, it looks like that's a pyrex test tube he's using to melt it in.
As far as how long it will take, you just need to heat it up to the melting point, or a bit further. It depends on how much you are melting, how much energy (heat) you put in, and how fast it is cooling down, but it shouldn't take long to melt a small amount in a test tube. [/quote1321620053]
Oh ok thanks. I will check out pyrex test tube but i think the reaction still damages the test tube itself. Do you think your previous suggestion of using ceramic material still applies?
Registered Member #3414
Joined: Sun Nov 14 2010, 05:05PM
Location: UK
Posts: 4245
Sophie Amelia wrote ...
Do you think your previous suggestion of using ceramic material still applies?
I'm no expert, but I would assume so. As for stainless steel, chlorides attack stainless steel. molted chlorides will attack it more severely, chlorates would presumably attack it even more. (eg, strangely, HCl causes inter-granular pitting, etc, where as HF just 'cleans' it.)
Maybe experiment with different ceramics/ceramic coatings?
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Molten Potassium Chlorate
