wg48
National Hazard
Posts: 821
Registered: 21-11-2015
Member Is Offline
Mood: No Mood
|
|
Slilica gel 4l for £2
In the UK B&M sell a cat litter called Silica Crystals at £2 for 4L. It appears to be be pure silica gel with less than 1% of a blue dyed
component. The blue bits apears to be an organic dyed componet, because on heating that component first turns black with a visible evolution of water
then on stronger heating turns white.
The gel gets warm/hot when combined with water and turns from from white translucant to water clear.
http://www.bmstores.co.uk/products/silica-crystals-cat-litte...
[Edited on 7-8-2017 by wg48]
|
|
|
Thestock
Harmless
Posts: 9
Registered: 6-8-2017
Member Is Offline
Mood: No Mood
|
|
I have used a similar Australian product to make sodium silicate worked great without any drying
|
|
|
physics inclination
Harmless
Posts: 40
Registered: 24-6-2017
Location: the field of physics
Member Is Offline
Mood: thermodynamically stable
|
|
wait if I'm not mistaken that's what's in those "do not eat dessicant" baggies, and cats using it as litter will inevitably get it in their fur/paws,
which they will lick clean 
|
|
|
wg48
National Hazard
Posts: 821
Registered: 21-11-2015
Member Is Offline
Mood: No Mood
|
|
Quote: Originally posted by physics inclination  | | wait if I'm not mistaken that's what's in those "do not eat dessicant" baggies, and cats using it as litter will inevitably get it in their fur/paws,
which they will lick clean |
Just to make to make it clear. I am not recommending it for your cat. I would assume you would train it to do this:
LOL
I do recommend it as a cheap desiccant or a cheap source of pure-ish SO2 for silicate production.
|
|
|
NedsHead
Hazard to Others
Posts: 409
Registered: 9-12-2014
Location: South Australia
Member Is Offline
Mood: No Mood
|
|
Are the blue pieces a moisture indicator and do they turn blue again if you rehydrate them?
|
|
|
wg48
National Hazard
Posts: 821
Registered: 21-11-2015
Member Is Offline
Mood: No Mood
|
|
No they are not a moisture indicator. They do do turn blue again (wet or dry) after being heated to a dull red heat. I strongly suspect the blue is
an oganic dye that decomposes on heating to leave carbon (the black color) which burns away on strong heating to a dull red heat. They are probably
added for aesthetic reasons though they may change color if peed on but the package does not say that.
|
|
|
NedsHead
Hazard to Others
Posts: 409
Registered: 9-12-2014
Location: South Australia
Member Is Offline
Mood: No Mood
|
|
That's a shame, I was hoping it was the indicating type repackaged as cheap kitty litter and maybe it could be reactivated
|
|
|
XeonTheMGPony
International Hazard
Posts: 1636
Registered: 5-1-2016
Member Is Offline
Mood: No Mood
|
|
cobalt chloride is used in color indicating silica gell, and fyi the regen heat for silica is 250c ! not red heat!!!!
As the cat litter no idea what they used there, I suspect it is an ammonia sensitive compound I'd wager.
FYI Silica gell is fairly inert in the digestive track so if a cat consumes small amounts it will be harmless, same for humans, just some humans are
not intelligent enough to figure out not to try and eat a bag of it if it happens to be next to some food! You'd think the taste would be a hint in of
its self!
|
|
|
Sulaiman
International Hazard
Posts: 3558
Registered: 8-2-2015
Location: 3rd rock from the sun
Member Is Offline
|
|
wg48
I just got one 3.8 litre bag of B&M "Silica Crystals Cat Litter"
have you any further information on the composition of the contents.
CAUTION : Hobby Chemist, not Professional or even Amateur
|
|
|
unionised
International Hazard
Posts: 5102
Registered: 1-11-2003
Location: UK
Member Is Offline
Mood: No Mood
|
|
I suspect that the blue stuff is whatever was cheap, but satisfied the idea that "I have seen this stuff before- the 'good' stuff has some blue bits".
|
|
|
wg48
National Hazard
Posts: 821
Registered: 21-11-2015
Member Is Offline
Mood: No Mood
|
|
| Quote: Originally posted by Sulaiman | I just got one 3.8 litre bag of B&M "Silica Crystals Cat Litter"
have you any further information on the composition of the contents. |
Apart from it being silica gel with less than 0.1% of an organic blue dye, I have no additional composition data.
Do you suspect its not silca gel or contaminated?
|
|
|
Texium
Administrator
Posts: 4508
Registered: 11-1-2014
Location: Salt Lake City
Member Is Offline
Mood: PhD candidate!
|
|
It looks as if it is in beads. Is there a prilling agent or something holding it together? Pure silica gel should be a free flowing, almost
liquid-like powder. Regardless, it should still be fine as a desiccant, though I was hoping for cheap home column chromatography when I saw the thread
title.
|
|
|
JJay
International Hazard
Posts: 3440
Registered: 15-10-2015
Member Is Offline
|
|
I've used Wally World silica gel kitty litter for making sodium silicate. It contained a blue dye that turned red with strong base and green when
heated to 800 C. I suspected it was something cobalt based but never figured out exactly what. I'd think this silica gel would contain something
similar.
|
|
|
wg48
National Hazard
Posts: 821
Registered: 21-11-2015
Member Is Offline
Mood: No Mood
|
|
| Quote: Originally posted by zts16 | | It looks as if it is in beads. Is there a prilling agent or something holding it together? Pure silica gel should be a free flowing, almost
liquid-like powder. Regardless, it should still be fine as a desiccant, though I was hoping for cheap home column chromatography when I saw the thread
title. |
Its consists of angular particles about 2mm to 5mm across.
|
|
|
S.C. Wack
bibliomaster
Posts: 2419
Registered: 7-5-2004
Location: Cornworld, Central USA
Member Is Offline
Mood: Enhanced
|
|
You just need a bigger ball mill or something. And very fine screens.
|
|
|
wg48
National Hazard
Posts: 821
Registered: 21-11-2015
Member Is Offline
Mood: No Mood
|
|
| Quote: Originally posted by JJay | | I've used Wally World silica gel kitty litter for making sodium silicate. It contained a blue dye that turned red with strong base and green when
heated to 800 C. I suspected it was something cobalt based but never figured out exactly what. I'd think this silica gel would contain something
similar. |
Cobalt chloride is is classifed as toxic in the UK where it was purchased so in theory there should be none it but if the raw materal came from china
... LOL
|
|
|
JJay
International Hazard
Posts: 3440
Registered: 15-10-2015
Member Is Offline
|
|
Cobalt chloride is GRAS for animal feeds in the U.S. *shrug*
|
|
|
![[*]](images/xpblue/default_icon.gif){kind=icon}
