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#Post#: 1278--------------------------------------------------
Re: Potassium tetraoxalate dihydrate
DIR By: Shiva
Date: November 28, 2012, 9:46 am
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Yes, but I'm not sure about its property. If it is deliquescent,
then it can't be crystallized by cooling in the open air. You
have to use desiccant for it and let it dry in a air tight
container.
Shiva
#Post#: 1305--------------------------------------------------
Re: Potassium tetraoxalate dihydrate
DIR By: Michel
Date: November 30, 2012, 7:43 am
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try seeding with larger crystals...
#Post#: 1340--------------------------------------------------
Re: Potassium tetraoxalate dihydrate
DIR By: rasool083
Date: December 1, 2012, 1:39 am
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I try several experiment.
1-dissolved the component in 50 centigrade and cooling it about
5 c each hour. not large
2- dissolved the component in 50 centigrade and cooling down
with very low mixing .not large
3-dissolved the component in 50 centigrade and using seeds. not
very good
4- dissolved the component in 50 centigrade and using several
layer in the container. not large
5-dissolved the component in 50 centigrade and cooling rapidly
to 30 C and then stay at this temperature for 15 min and then
coolig slowly .not large
6- I prepare in 20C and waiting for evaporation but I get a
sample of it to oven at 30 C after 30min cooling it down and get
good size but I can not do it again.
7-dissolved the component in 50 centigrade and cooling slowly to
30C and stay at 30C for 30min then cooling it down slowly.it was
good too but Icould not get it again
#Post#: 1343--------------------------------------------------
Re: Potassium tetraoxalate dihydrate
DIR By: Shiva
Date: December 1, 2012, 8:16 am
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oh man. I should award you Karma for trying various methods to
obtain large grains. Well, May I know why you need large
crystals? As I said, you can get big crystals by exposing it in
air or add few drops of water when it is in dry condition and
mix it well and let it dry again.
Shiva
#Post#: 1581--------------------------------------------------
Re: Potassium tetraoxalate dihydrate
DIR By: Michel
Date: December 14, 2012, 12:18 pm
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Hi rasool083..I'd love to know how far you've gone with your
project..any success so far?
#Post#: 1657--------------------------------------------------
Re: Potassium tetraoxalate dihydrate
DIR By: rasool083
Date: December 21, 2012, 10:02 am
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hi
thanks for your attention
I found out that if I dissolve oxalic acid in the 50 centigrade
in the water with potassium carbonate and then I heat it about
55 centigrade for some min and let cooling down slowly with a
rate of about 3-4 degree per hours to 30 centigrade and in this
degree remain about 20 min and also in the 25 so I can get 2-3
millimeter grains.
but it must have a method for industrial scales. perhaps there
is crystalizator or crystallization machine for this purpose.
do you know any more?
#Post#: 1836--------------------------------------------------
Re: Potassium tetraoxalate dihydrate
DIR By: Michel
Date: January 3, 2013, 7:39 pm
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Of course there are such plants available. Consider discussing
with development chemists and chemical engineers, because
scaling up the process would involve it's attendant problems,
and of course unplesant surprises.
#Post#: 1860--------------------------------------------------
Re: Potassium tetraoxalate dihydrate
DIR By: rasool083
Date: January 6, 2013, 4:41 am
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Hi
I am ask from a producer he said that Potassium oxalate is
powder and potassium mono oxalate is small grains and potassium
tetraoxalate is large grain.
so I think I am producing potassium mono oxalate or potassium
oxalate . how I must certain about it?
what is the difference of their production?
#Post#: 1888--------------------------------------------------
Re: Potassium tetraoxalate dihydrate
DIR By: Michel
Date: January 8, 2013, 5:56 am
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You may need to search for articles on its production, or you
can send your samples to any corporation you know that does
analyses, to confirm.
They may charge quite a handsome fee, but it might be worth it!
Btw I was thinking Shiva mentioned about preparing the
tetraoxalate somewhere in this thread...or am i missing
something??
Or are we talking about scaling it up.?
#Post#: 1898--------------------------------------------------
Re: Potassium tetraoxalate dihydrate
DIR By: rasool083
Date: January 8, 2013, 12:27 pm
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I test it with XRD and this is my result.
it was very similar to potassium tetraoxalate but not the same.
what do you think?
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