I have been reading for about 4 hours on the site, but unfortunately, there is no clear information, can someone write properly how to process the ceramic capacitor, what I know is that the water is shaped, first we put it in hcl, filter it into nitric acid and then bring it to ph 6 and then add dmg to it.
How to process a ceramic capacitor
- Thread starter elbekasan
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kjavanb123
Well-known member
Hi
Here is how I do them mlcc,
1. Dissolve in nitric acid as they are, no need to crush them
2. Boil in nitric till no more brown fumes.
3. Use rice woven bags to filter the solution, usually green in color.
4. Wash the filtrates to a beaker and add fresh nitric and boil to make sure no PMs left in them.
5. Filter and wash that till solution is clear. Add the solution to previous batch.
6. Add hcl or salt to main solution to drop any silver as silver chloride.
7. Decant, add water decand till washed solution is clear..
8. First check your solution with stannous chloride test to make sure there is any Pd. If there is then pour 100ml tab water to a beaker, heat it to near boiling, add 4g lye or naoh. Then add 5.8g dmg powder and stir till most of dmg is dissolved.
You add that dmg to your Pd solutjo. Pd drops as yellow powder which due to copper or nickel in solution maybe be green, you filter it and wash it few times it will turn canary yellow.
Also in my SMDs batches I noticed there are some gold foils that may carry over from pins or small components into your batch, you can AR the left over SMDs to get that tiny gold too.
Hope that helps.
Here is how I do them mlcc,
1. Dissolve in nitric acid as they are, no need to crush them
2. Boil in nitric till no more brown fumes.
3. Use rice woven bags to filter the solution, usually green in color.
4. Wash the filtrates to a beaker and add fresh nitric and boil to make sure no PMs left in them.
5. Filter and wash that till solution is clear. Add the solution to previous batch.
6. Add hcl or salt to main solution to drop any silver as silver chloride.
7. Decant, add water decand till washed solution is clear..
8. First check your solution with stannous chloride test to make sure there is any Pd. If there is then pour 100ml tab water to a beaker, heat it to near boiling, add 4g lye or naoh. Then add 5.8g dmg powder and stir till most of dmg is dissolved.
You add that dmg to your Pd solutjo. Pd drops as yellow powder which due to copper or nickel in solution maybe be green, you filter it and wash it few times it will turn canary yellow.
Also in my SMDs batches I noticed there are some gold foils that may carry over from pins or small components into your batch, you can AR the left over SMDs to get that tiny gold too.
Hope that helps.
nickton
Well-known member
Are you talking about SMD's or Mlcc's?
Do you mean the process is the same?
Also: How much nitric did you use for what amount of material?
Also when you boil in nitric "to make sure there are no more PM's", do you mean "precious metals", or "platinum group metals"?
Why would you want to get rid of pm's if that is what you are trying to recover?
Is Pd Palladium?
Also, there are other types of ceramic capacitors other than MLCC's, though I'm guessing the questioner is referring to only MLCCs.
Do you mean the process is the same?
Also: How much nitric did you use for what amount of material?
Also when you boil in nitric "to make sure there are no more PM's", do you mean "precious metals", or "platinum group metals"?
Why would you want to get rid of pm's if that is what you are trying to recover?
Is Pd Palladium?
Also, there are other types of ceramic capacitors other than MLCC's, though I'm guessing the questioner is referring to only MLCCs.
No disrespect but after only four hours reading you will not have learnt half enough to even consider processing any scrap unless you have previous experience. This is not a get rich quick hobby or business we are dealing with some very toxic chemicals and there are fumes that can kill and then you have whatever elements are in your scrap which can form highly toxic solutions.
Learn to do it the right way, it will take some time but you will be healthier and stand a better chance of success.
Learn to do it the right way, it will take some time but you will be healthier and stand a better chance of success.
if you mean mlccs you firstly need to put them in hcl firstly to avoid any metastannic acid in the future steps
Pour them in HCL for at least 12 hours then wash them carefuly with hot tap water 3 or 4 times to get rid of tin and hcl then heat the mlccs for an hour to dry them and thus crushing them will be easier, crush them into powder and add hot concentrated nitric acid to the powder slowly, a strong reaction will start and nitrogen oxides will rise , so work in open area please.
1 litter of nitric acid per 3 kg of mlcc powder is more than enough
after adding nitric leave it for 12 hours at least and make sure to stir every couple hours , you will notice brown fumes during that , when brown fumes stop rising then your reaction is done , now filter the nitric and wash the ceramic powder with distilled water, add that water to the nitric (use few water please)
Add HCL to the nitric, aqua regia will form , and silver will drop as silver chloride wait it to precipitate fully, then filter it, take silver chloride with filtration and make sure to keep it wet untill you process it with lye and sugar laters , the aqua regia now contains your palladium and possibly platinum , eleminate the nitric acid with sulphamic acid or by evaporation
Drop the platinum with ammonium chloride wait it to fully precipitate, filter it, then drop palladium with chlorine gas or DMG
The palkadium precipitate will be yellow if you use DMG or red if you use chlorine gas
another method to precipitate the palladium from the aqua regia after taking silver is by the following :
add clean tap water to aqua regia, the amount of water added to aqua regia should be 2 times its original volume
This way we dilute the acids and make cementing on copper possible
add copper powder to the solution, palladium will cement down as black powder
Keep adding copper powder slowly until no further reaction happens
Filter the palladium
Here you need to be careful with the platinum metals group, they are poisonius and dangerous never touch or inhale their powder
Good luck
Pour them in HCL for at least 12 hours then wash them carefuly with hot tap water 3 or 4 times to get rid of tin and hcl then heat the mlccs for an hour to dry them and thus crushing them will be easier, crush them into powder and add hot concentrated nitric acid to the powder slowly, a strong reaction will start and nitrogen oxides will rise , so work in open area please.
1 litter of nitric acid per 3 kg of mlcc powder is more than enough
after adding nitric leave it for 12 hours at least and make sure to stir every couple hours , you will notice brown fumes during that , when brown fumes stop rising then your reaction is done , now filter the nitric and wash the ceramic powder with distilled water, add that water to the nitric (use few water please)
Add HCL to the nitric, aqua regia will form , and silver will drop as silver chloride wait it to precipitate fully, then filter it, take silver chloride with filtration and make sure to keep it wet untill you process it with lye and sugar laters , the aqua regia now contains your palladium and possibly platinum , eleminate the nitric acid with sulphamic acid or by evaporation
Drop the platinum with ammonium chloride wait it to fully precipitate, filter it, then drop palladium with chlorine gas or DMG
The palkadium precipitate will be yellow if you use DMG or red if you use chlorine gas
another method to precipitate the palladium from the aqua regia after taking silver is by the following :
add clean tap water to aqua regia, the amount of water added to aqua regia should be 2 times its original volume
This way we dilute the acids and make cementing on copper possible
add copper powder to the solution, palladium will cement down as black powder
Keep adding copper powder slowly until no further reaction happens
Filter the palladium
Here you need to be careful with the platinum metals group, they are poisonius and dangerous never touch or inhale their powder
Good luck
