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Drying individual chemicals


pyrodoc

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Hi all,

 

I have an oven and want to dry out my sodium nitrate, strontium nitrate and strontium carbonate. For how long and what temperature the oven needs to be set.

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Keep the temperature low... I wouldn't go much over 200 F. The time depends on a number of variables (how wet the chem.s are, how thin of a layer are they spread out ect, ect, ect. Checking the chemicals out periodically, while giving them a stir, will determine when they are done. I use a food dehydrator to dry things. It has a combination of low heat and circulating air. This dries thing very quickly.

Edited by MadMat
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Unless you're removing water of hydration there isn't any reason to go above 105°C (220F). Best way to judge the result is to monitor the weight, simply dry until no further weight loss is measured.

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I generally check the stability of a chemical at 100deg C and so long as it is fine, do that, or just under. If there is water of crystallisation which is only released at a higher temp I may use the higher temp, or just accept that level of hydration.

 

Mostly make sure that 100 is not dangerous. I would not want Ammonium perc at or above 100 deg (I've seen this go wrong, it catches fire on it's own, no fuel added) but all the chems you listed would be fine at 100 C. I'd personally go about 90 - 100.

Edited by Seymour
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