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Steve_hi
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agricultural KCl
I bought a 25KG bag of 00.00.60 muriate of potash the guy at the store says that's the old name for potassium chloride
I always thought kCl was green like the melting salt we use on ice but this stuff is redish brown.
what else is in with it and how can i go about purifying it
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hissingnoise
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I just dump it in warm water, filter and partially evaporate to precipitate crystals . . .
The red gunk, AFAIK, reduces its solubility in soil!
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woelen
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If you intend to purify it, then keep in mind that pure KCl is white or somewhat transparent like pure ice if you have large crystals. It certainly is
not green. Powdered KCl or KCl consisting of small crystals is white like pure table salt.
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elementcollector1
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To put it in perspective, it is table salt! The Na+ ion has been switched out for a K+, but the result still tastes and looks the same: A white salt
with cubic crystals.
I would guess the green is dyes? I've seen green, orange and blue on road salt before.
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DraconicAcid
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Quote: Originally posted by elementcollector1  | | To put it in perspective, it is table salt! The Na+ ion has been switched out for a K+, but the result still tastes and looks the same: A white salt
with cubic crystals. |
I've heard people say that, but I've always found potassium chloride to taste revolting, and nothing like sodium chloride. No "lo-salt" for me.
Please remember: "Filtrate" is not a verb.
Write up your lab reports the way your instructor wants them, not the way your ex-instructor wants them.
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zed
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Tastes OK to me. But, as you say, some people...do find the taste disgusting.
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Steve_hi
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Ive been recrystalizing this shit all day getting sick of it
ill have about 15 20 lbs of it when im done tomorrow
any ideas what I can do with it. the only purpose i have in mind for it right now is to make a 3.3 M solution to keep my pH probe in.
what else can I do with it besides melt the ice off my door steps
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elementcollector1
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Convert it to other K compounds? You could electrolyze it to hydroxide, with the right setup.
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Steve_hi
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That sounds interesting do you have procedure you could share with me on how to do that and what equipment I wwould need
I do want some KOH
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elementcollector1
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You will need: two containers (either beakers or flowerpots), a good source of electricity (a car battery charger?) and, if you're using beakers, a
paper towel. The negative electrode (cathode) can be anything, but stainless steel is recommended; the anode must be carbon, platinum or MMO to resist
the chlorine gas.
Pour tap water into the container with the cathode (should be the smaller flowerpot that's inside of the larger one) and concentrated salt water into
the other cell. Connect the anode (carbon or whatever) to the salt water, and the metal cathode to the tap water. Let run for a few days.
When noticeable bubbles of gas are coming off your metal electrode, that means it's working.
When you think the electrolysis is done (this can be calculated based on the voltage and amperage of your cell), switch the power off, and boil down
the KOH in a steel container (preferably not a soup can, as I learned. This gives pure KOH. The reason you shouldn't boil down in glass is because KOH
solutions can react with glass.
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Steve_hi
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Okay thanks Ill try that when I have evrything I need I have good DC power supplies and carbon rods I took out of Batteries
so ill buy some stanless rod and the Ill be good to go
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elementcollector1
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One quick note: Those carbon rods tend to degrade into carbon powder, something about forming an intercalated graphite-oxide that weakens the
structure of the rod. This doesn't happen to everyone, and if it does it happens slowly, but you should be fine provided you filter out the black
stuff with a coffee filter, or a paper towel.
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woelen
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Use it to make KClO3. Use the search engine to find threads about making this. That is one of the very few interesting uses. Making KOH from KCl is
MUCH more difficult and requires good apparatus. It is not impossible, but it is hard!
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metalresearcher
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Indeed he tells about two separate containers, but does not tel how to connect them it won't work. When making KClO3, the newly formed KOH
*should* react with the Cl2 gas at the anode. But with making KOH it should be kept separated which is indeed much more difficult as @woelen says.
You can get KOH from ebay it is very easy and cheap, I got it without problem.
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plante1999
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If you got a large amount of mercury, it could be quite easy to make KOH from it. However it would be harder without it, but still possible. In both
case you will need MMO anode, or another expensive material. I have a few piece lefts,one of 3 by 5inch if a remember and many of 1-2 inch by 5. If
you are interested please U2U me.
If you don't have mercury you will have to use a diaphragm cell. Based on asbestos, as it used to be the best one before its use was regulated (I can
provide you asbestos sheet /plate too). However you can use some clay with less efficiency.
I never asked for this.
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Steve_hi
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| Quote: |
You can get KOH from ebay it is very easy and cheap, I got it without problem.
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I have Posttasiym Hydroxide comming from elemental scientific but they are slower than the secon d comming
I caný but from Ebay any more because they told me I have reached my spending limit
And I refuse to give them my bank account details
But I will do as Woellen has sugested just need to get those special metals for the anode/ cathode
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alancain
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Two flower pots
There is an old industrial process for making KOH using iron pots inverted into the KCl bath - used for some other things too, but I guess you could
use stainless steel bowls and measuring cups :}
The inner bowl is inverted so there is an area isolated from the atmosphere, collecting useful things like chlorine at the electrode under the bowl.
Also alkali metal production...
This reminds me of Downs cells. Must... look... up....
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vmelkon
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| Quote: Originally posted by plante1999 | If you got a large amount of mercury, it could be quite easy to make KOH from it. However it would be harder without it, but still possible. In both
case you will need MMO anode, or another expensive material. I have a few piece lefts,one of 3 by 5inch if a remember and many of 1-2 inch by 5. If
you are interested please U2U me.
If you don't have mercury you will have to use a diaphragm cell. Based on asbestos, as it used to be the best one before its use was regulated (I can
provide you asbestos sheet /plate too). However you can use some clay with less efficiency. |
If you want to see it in action on a small scale in a lab or on an industrial scale, here you go
https://www.youtube.com/watch?v=GtxiCZrLH8g&list=FLJruTw...
PS: it is for NaOH, but the same applies to KOH
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Aqua-regia1
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This product consist appr. 5-10% of NaCl and 90-95 % KCl, and little bit of iron impurity. (My company is wholsale trader of this) Pure KCl can you
get from this salt with twice recristallisation. Piece of cake.
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Mailinmypocket
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If you want to avoid the headaches of purifying your salt, for what it's worth get this:
http://www.siftocanada.com/products/water-conditioning/
The first item on that page "nature's own" consists of virtually pure KCl. Lots of other companies make it, that just happens to be the brand I buy.
They are large pellets though, so you either need to smash them up or dissolve them in boiling water... Trying to dissolve them at RT is almost
useless due to how compact the pellets are and the endothermic dissolution itself.
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Eddygp
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Well, separating NaCl from KCl AFAIK is very difficult...
I like the Na3PO4 or NH3H2PO4 taste, piquant and sour 8)
there may be bugs in gfind
[ˌɛdidʒiˈpiː] IPA pronunciation for my Username |
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hyfalcon
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By a 50lb bag of no-salt softener salt from Lowe's. $15.00-$16.00 if I remember correctly. Doesn't even need a recrystallization.
Just dissolve till you have a saturated solution then filter through 2 paper towels to remove anything that might be left undissolved. I've used this
to successfully feed a chlorate cell.
[Edited on 31-3-2013 by hyfalcon]
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Steve_hi
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I looked at a lot of places around here "Canada" and made lots of calls but found no Potassium chloride.
Then doing grocery shopping at Price Chpppers in Newport VT
I had a slap your head moment on the way out I saw some water softening salt as you described. But I learned alot about filtering and recrystalization
using diffent coffee filters and freezing out crystals boiling it down and just letting it air dry each has advantages and disadvantages. So even
though it took a lot of time and many filters I think the expieience was worth it.
[img]C:\Users\Steve\Pictures\2013-03-31 2013\01.jpg[/img]
[img]C:\Users\Steve\Pictures\2013-03-31 2013\02.jpg[/img]
[img]C:\Users\Steve\Pictures\2013-03-31 2013\04.jpg[/img]
[img]C:\Users\Steve\Pictures\2013-03-31 2013\05.jpg[/img]
[img]C:\Users\Steve\Pictures\2013-03-31 2013\06.jpg[/img]
[img]C:\Users\Steve\Pictures\2013-03-31 2013\07.jpg[/img]
     
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Steve_hi
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Myfirst Chlorate cell
Made with UHMW plastic an o-ring seals the gas from escaping from the side and the carbon Anode and food grade stainless steel cathode are tightly
fitted in 1/4" reamed holes with a copper barbed fitting to lead into water and NaOH if I run the cell inside the power supply is a 5v 5a wall wart.
I have a 30v 10a power supply comming this week
[img]C:\Users\Steve\Pictures\2013-03-31 2013\08.jpg[/img]
[Edited on 31-3-2013 by Steve_hi]
[Edited on 31-3-2013 by Steve_hi]
[Edited on 31-3-2013 by Steve_hi]
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plante1999
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30V is way too much!!! You should use 3.33V at max 6V, especially if you are using graphite!
I never asked for this.
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