Removing Burnt Carbon from Used Oil

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The discussion centers on methods for removing burnt carbon from used oil, specifically hydraulic oil. A participant suggests using an aqueous solution of sodium silicate to extract carbon, noting that it can be effective. There is acknowledgment that simply removing carbon does not make the oil suitable for engine use, but the participant is focused on cleaning the oil for biodiesel production and other uses. They express difficulty in sourcing sodium silicate and seek recommendations for suppliers in Derbyshire. Another contributor mentions that pottery shops often carry sodium silicate, which is also known as "egg preserver" silicate. Caution is advised regarding the use of caustic substances due to the additives in hydraulic oils, which may react negatively. The participant is experimenting with mixing the oil with biodiesel and standard diesel to improve its usability.
oilboil
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Hi to all i would like to ask is there a way of getting burnt carbon out of the used oil i have tried all i can think of but still can't get it all out is their a bleach or some thing i can use
please don't tell me about the old trick with a rope it takes to long

Thanks
 
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You can extract it with an aqueous solution of sodium silicate (42 baume) diluted somewhat. The carbon will go out with the water.
 


hi thank you will try the sodium out,
what about used hydraulick oil will it work the same or is their something else that will clean it
 
Just removing the "burnt carbon" will not make the oil suitable for use in an engine again.
 
yes i know this i do make biodiesel , and have a centralfuge and all the filters but the rest of thining it out for use hydraulick oil at a 50 50 or running by extra heater no problem but still can't get the black or brown stuff out not even at over 5000 r.p.m i am an engineer so i made my own machines up but i am no Genius nor perfect at this cleaning oil lol

sodium silicate may do the job but at the moment i am still trying to get some without any luck. I have an endles suppley of hydraulick oil to keep me going for a long time so i do want to waste it. so if anyone out their know were i can get some sodium silicate in derbyshire please let me know
thanks
 
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Pottery shops usually have some around to make 'slip'. It is sometimes called 'egg preserver' silicate.

Hydraulic oils have lots of detergents and high pressure additives. I wouldn't try extracting it with any caustic (unless you like mayonnaise...). Some hydraulics oils are ester based rather than light petroleum oil based and would react with sodium silicate.
 
Thank you chemisttree for the advise i will try it see which one does the best job making a nice filtering tank wash and bubbles bath all in one
at the moment i mix it with boidiesell and normal diesel to thin it out it seems to work well full tank every week lol
anyway all the best mate to you and family will talk soon.
i shall feel better if i can clean it as well lol
my msn is tripleinktattoos@hotmail.co.uk also my email
 

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