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Author: Subject: Sodium chlorate-proprieties
jock88
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[*] posted on 26-5-2015 at 06:45



Sodium Chlorate will drop out as you keep the chloride level high (around 130 gramps per liter of solution). The chlorate level will keep going up and up as more salt is added and the salt is obviously being converted to chlorate. After some time you will start to get solid crystals of pure chlorate coming out of solution. The only thing contaminating these crystals is the 'dirty' wet solution that will be stuck to them.
The same happens in a sodium perchlorate cell. Keep adding sodium chlorate solution as the chlorate is used up (converted to perchlorate) and you will get solid crystals of sodium perchlorate coming out of solution.

It's all explained here if you want to read.
http://oxidizing.typhoonguitars.com/chlorate/remove.html

Most dwtbtfar*

an example of sodil sodium perchlorate coming from a cell

http://oxidizing.typhoonguitars.com/chlorate/leaddiox/mmold....

(run seven)

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[*] posted on 5-6-2015 at 08:22


Sorry, I read a lot, but my understanding was that it is not pure chlorate that is dropping out if the saturated solution but rather a mixture of both chloride and chlorate.

Also Sodium perchlorate is more soluble than chlorate. Why would the perchlorate drop out here?


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TheMrbunGee
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[*] posted on 31-5-2018 at 10:00
Sodium chlorate solubility in acetone


Hey SM, sorry for bringing this old post up.

I made my first batch of NaClO3 (NaCl electrolysis), and boiled most of the water off the liquor (after filtering). Everything seemed fine, rest of the water I evaporated slowly. got crystals. mixed some with sugar and set it on fire - mixture burned quite fast, similar to KNO3. (not sure how NaClO3 should burn, first time handling it)

There was obviously a lot of impurities, so I looked up a way to clean it up. I read in few places, that sodium chlorate is soluble in acetone, and quite a lot. {Solubility in acetone : 51.8 g/100 g} - wiki.

So I milled up the salts(75g), dropped them into a jar and poured 150g of acetone on top. Warmed the jar up a bit. There was still a lot of salt in the solution, so I thought I just have a very dirty batch. Any way, l mixed the salt for few minutes, and filtered off the salt.

Left the acetone solution to evaporate. After that was done there was like micro gram quantities of solid. With powerful oxidizing properties.

And the filtered off salt still has oxidizing properties.

Is Sodium Chlorate really soluble in acetone? And if it is - what the hell did I make? Did I miss something?


The cell run:

Anode - graphite
Cathode - titanium
Water ~ 250ml (added some in the process.)
NaCl ~ 70g
Time ~ 25h
Current ~ 5.5A on average.










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Diachrynic
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[*] posted on 31-5-2018 at 10:44


Funny thing, I just finished my chlorate cell run!

Parameters:
Anode - graphite (150 cm²)
Cathode - titanium (grade 4) (150 cm²)
Dichromate - yes
pH-adjustments - yes (everyday at the start, then every two or three days)
Run time - 366 h
Current - 5 A
Voltage - 4 - 6 V (most of the time 5 - 5.5 V)
Volume - 1.4 l
NaCl - 500 g
Temperature - between 30 and 50 °C (on the outside)

The run time was chosen to leave 100 g/l of NaCl in the solution to minimize anode wear.

I boiled it for 10 min to get rid of NaOCl, filtered off the graphite dust, and then boiled down until there is salt visible. Cooled down, got the crystals out. They are currently drying. I tested a small batch with sugar - burnt well even when damp. They are still a bit grey, but a recrystallization would probably fix that.

When I get some acetone, I could test the solubility.

EDIT: This may be of interest to you:

Quote:
EXAMPLE III The process of Example II was performed using acetone containing 5 percent by weight of water and a mixture of solid sodium chlorate and sodium perchlorate. The solution obtained contained 233 grams per liter of sodium perchlorate and only 4.8 grams per liter of sodiumchlorate. The solubility of sodium chlorate in such an acetone-water mixture was found to be 12.3 grams per liter. Thus, the presence of sodium perchlorate appears to depress the solubility of sodium chlorate.

https://patents.google.com/patent/US3151935

[Edited on 31-5-2018 by Diachrynic]




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TheMrbunGee
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[*] posted on 31-5-2018 at 10:51


I found this:

https://srdata.nist.gov/solubility/IUPAC/SDS-30/SDS-30-pages...

It says that only .1 g will dissolve in 100g acetone. well - I guess Wikipedia has been proven wrong. SMWiki also has the wrong facts..

Could someone confirm?

Feels weird. :D




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Diachrynic
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[*] posted on 31-5-2018 at 11:35


Mabus has corrected the value in the ScienceMadness-wiki.
See also: http://chemister.ru/Database/properties-en.php?dbid=1&id...




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TheMrbunGee
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[*] posted on 31-5-2018 at 20:49


I changed it on Wikipedia.



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