Sodium Hydroxide Solution Error Help

[user 72646]

Hi

I am a lucky newbie.

I washed filters in sodium peroxide by mistake...

And I now have brown filter, golden solution, and all filter papers have gone blue?
Blue may signify copper
Unsure what the brown filter material is
And the gold solution looks orange...pt?

Any Ideas

 

[Martijn]

Hi Midas, try to keep your chemical names right, it's hydroxide not peroxide.
What did you filter?
I suspect iron hydroxides, wash with HCL to reacidify and filter the salts out.
Test the filtered solution with stannous.
if these are AR filters, i always add some dissolved SMB to the filters to convert any AuCl to Au before incinerating the papers.
Are these filters from refining the pm's you got from your AP leaches? Processing e-waste?

Martijn.
edited for correct chemical names

 

[user 72646]

Hi

Will follow steps...


Yes all from e-watse.
Vinegar and peroxide
Then hcl wash
Then accidently dumped filters in sodium hydroxide.
Then got brown mud in solution.

 

[Martijn]

Stop with the vinegar and the peroxide. Stick to HCl and copper oxide or -bicarbonate to make AP.

 

[user 72646]

Hcl and bi carb?
What does the reaction give off in terms of gases?

 

[Yggdrasil]

Hcl and bi carb?
What does the reaction give off in terms of gases?

I guess he meant Copper bicarbonate?
Edit to add:
Mostly CO₂

 

[Martijn]

I guess he meant Copper bicarbonate?
Edit to add:
Mostly CO₂

Yes, the green stuff, like on copper roofs.

 

[user 72646]

Ok, so the Green copper bicarbonate, will drop or create metallic Pt

 

[user 72646]

What would consider to be least Hazardous in terms of reaction

Copper Bicarbonate
Or
Ammonium Chloride?

When dropping platinum

 

[FrugalRefiner]

Ok, so the Green copper bicarbonate, will drop or create metallic Pt

No, he suggested HCl and copper oxide or copper bicarbonate to make AP, not to drop platinum from solution.

Given your current level of knowledge, I would recommend cementing the platinum out of solution using metallic copper. See When In Doubt, Cement It Out.

Dave

 

[Shark]

Vinegar = Just say no.

 

[user 72646]

Hi

No, he suggested HCl and copper oxide or copper bicarbonate to make AP, not to drop platinum from solution.

Given your current level of knowledge, I would recommend cementing the platinum out of solution using metallic copper. See When In Doubt, Cement It Out.

Dave

Hi Dave

I have added copper wire to a solution and it seems to have created silver sulphate!
Pretty cool
So I just add metallic copper pipe to platinum solution and cement the metallic platinum.. Would this allow for any gold to be dropped post cementation, or should this occur prior to cementing platinum?
Finally Is this an immediate reaction or over a few hours, or Days?

 

[Yggdrasil]

Hi

Hi Dave

I have added copper wire to a solution and it seems to have created silver sulphate!
Pretty cool
So I just add metallic copper pipe to platinum solution and cement the metallic platinum.. Would this allow for any gold to be dropped post cementation, or should this occur prior to cementing platinum?
Finally Is this an immediate reaction or over a few hours, or Days?

Just out of curiosity.
What was your starting material?
It is highly unlikely to be Silver in solution if the leach included any kind of Chloride.
And Sulfates do not form unless there are either Sulfuric acid or other Sulfate ions that can swap place with what you are dropping out of solution.

 

[Martijn]

A sulfate can only form when sulfur is present.
Your'e making assumptions on one visual observation, and are going on from there.
Let's gather facts first and see what's likely instead of thinking E-waste contains Pt or that filters from AR will contain silversulfate.
You likely very probably made iron hydroxide and need to dissolve that in HCl and filter it off. Then put the used filters back in a container a go study!.

Dealing with waste, e.g., it explains the basics of cementing values out and the reactivity series.
Once you feel you learned a lot, then you find out there are just as many exeptions to the rules as there are rules. it all depends on the fine details of your material, setup, processes and experience.

Know and verify instead of assuming. because it makes an *** out of U and ME.

Martijn.

 

[user 72646]

Thanks
In terms of adding SMB

I have little solution, maybe 250ml....
Would it be 1/10 ratio?
So I add 25ml of dissolved smb to gold solution 250ml?
Or just little by little...5ml at at a time?

Then add copper to remaining solution to cement platinum?

 

[user 72646]

Just out of curiosity.
What was your starting material?
It is highly unlikely to be Silver in solution if the leach included any kind of Chloride.
And Sulfates do not form unless there are either Sulfuric acid or other Sulfate ions that can swap place with what you are dropping out of solution.

Hi
I've never used sulfuric acid or nitric.

I have some smb
And was going to add to gold solution and then cement platinum with copper pipe, as I have no copper carbonate.
I have no nitric no sulphuric only Hcl and peroxide and vinegar in solutions.
Would the smh be next stage or cement platinum first?

 

[Yggdrasil]

Hi
I've never used sulfuric acid or nitric.

I have some smb
And was going to add to gold solution and then cement platinum with copper pipe, as I have no copper carbonate.
I have no nitric no sulphuric only Hcl and peroxide and vinegar in solutions.
Would the smh be next stage or cement platinum first?

Then there will be NO Silver due to the HCl, and depending on the starting material there will be no Pt either.
The Stannous color is one out of many that can arise
Depending on the materials dissolved there form the test.
We have no picture of the paper before the test.
And as everybody says, drop the Vinegar,
it only complicate matters and the Acetates may also be more toxic than the Chlorides.
I'd like a step by step what you have done so far, if you don't mind.

 

[Martijn]

dosage of of SMB is about one gram for every gram of recovered gold (you should have determined some way before going for the AR step).
A hand full of foils is really very little weight in gold.

And to repeat Yggdrasil:

I'd like a step by step what you have done so far, if you don't mind.

What went into AP, how was the AP made, how much went into the AP? How much H2O2 additions? Which quality was the e-waste? How much are you expecting? end everything else you can think of. Details matter. Not to point out what you may have done wrong and have a good laugh about it, but to truly understand your situation.

I'm pretty sure there is no Platinum, let it go.

Research "stockpot". (Dealing with waste)

Martijn.

 

[user 72646]

dosage of of SMB is about one gram for every gram of recovered gold (you should have determined some way before going for the AR step).
A hand full of foils is really very little weight in gold.

And to repeat Yggdrasil:

What went into AP, how was the AP made, how much went into the AP? How much H2O2 additions? Which quality was the e-waste? How much are you expecting? end everything else you can think of. Details matter. Not to point out what you may have done wrong and have a good laugh about it, but to truly understand your situation.

I'm pretty sure there is no Platinum, let it go.

Research "stockpot". (Dealing with waste)

Martijn.

Hi

That last AP was a mess...a mixture of vinegar and peroxide...

Bottled and neutralised..
I agree there may be no platinum, although solution went from yellow to breakfast orange juice colour after application of SMB.

[with these failed attempts I neutralise with baking soda and store] We are talking about 3litres of liquid.


The AP I am working on now..
Is HCL peroxide and basic electrical. Waste...fingers, etc, and a couple of bits from phones...

The solution is Black green yellow..
After second filter it now looks slightly clearer, with the filter paper bright yellow orange.
I have noticed that the AP has slight fumes, should I kill with urea? Or Soda?
Note.. No nitric acid or sulphuric acid involved in this process.

The solution is better in terms of clarity, however still grey Black green, however the drips from filter are all green yellow in colour.
I think this is the best solution as it has (a formula) to the process. HCL Peroxide and 3 week waiting time.

I have smb but will filter a couple more times to see if I can get the solution clear.

Will post pics shortly

MM

 

[Yggdrasil]

Hi

That last AP was a mess...a mixture of vinegar and peroxide...

Bottled and neutralised..
I agree there may be no platinum, although solution went from yellow to breakfast orange juice colour after application of SMB.

[with these failed attempts I neutralise with baking soda and store] We are talking about 3litres of liquid.


The AP I am working on now..
Is HCL peroxide and basic electrical. Waste...fingers, etc, and a couple of bits from phones...

The solution is Black green yellow..
After second filter it now looks slightly clearer, with the filter paper bright yellow orange.
I have noticed that the AP has slight fumes, should I kill with urea? Or Soda?
Note.. No nitric acid or sulphuric acid involved in this process.

The solution is better in terms of clarity, however still grey Black green, however the drips from filter are all green yellow in colour.
I think this is the best solution as it has (a formula) to the process. HCL Peroxide and 3 week waiting time.

I have smb but will filter a couple more times to see if I can get the solution clear.

Will post pics shortly

MM

It will be better to use AP the proper way.
Use HCl and an aquarium bubbler, it is cheaper and it will not create a risk of dissolving the Gold.