Search results for query: ap

...but since it was a dirty solution, you may have had an abundance of multi-valent base metals. Think about the copper chloride leach (aka AP). It works because copper is a multi-valent element, which can move easily from a +1 to a +2 state and back. Copper in the +2 state oxidizes metallic...

hello again, I have a few laptop touch pad boards and some tablet boards that have a lot of gold plating. I'm wondering if I should just AP the entire boards? or is it better to cut all the gold plating off the boards to try and bring as little base metals as possible? Also, does anybody know...

...also has a direct effect, seems like when I have added too much 3% peroxide it diluted the hydrochloric acid and actually slowed the process. With or without heat also makes a difference, and so does with or without air bubbling through it does. It's not a fast process only cheap and...

I used the AP method for RAM memory before and it worked well apart from the time spend preparing the sticks. Today I finally got my hammer mill working so I tried shredding it a bit and mix some other gold containing materials. The nice thing about shredding is that difficult to disassemble...

...will cause some gold to dissolve and often panic new users into thinking they have lost their gold. Pins are slow in CuCl2, often miss named as AP, or Acid/Peroxide. It will work but takes quite a bit of time. Quality pins, as yours appear to be, are often ran in a sulfuric cell, if there is...

Did your gold drop yet? Janie

It took me 4 days to do a pair of eye glasses in AP. The fifth day I filtered out the gold foils and ran them in AR. If the weather is cool it may take longer, and time will be more weather dependent based on the actual temperature. Take your time and allow it to take how ever long it takes...

I started my first AP with no gold. I put some copper wire in a container, covered it with HCl, then added about a capful of 3% hydrogen peroxide. I let it sit quietly for several days, just stirring it a bit a couple of times a day. That creates the CuCl2 leach with no excess peroxide to...

...from anything I want to protect until I am ready to process the waste stream. For the volume your working with, it would be easier to learn the AP process and waste clean up before starting a new lot. I have run AP in 1.5 liter beakers to test materials with no problem while using a 5...

Under 50 grams. I have an aquarium air pump. How long would you suggest with the hydrochloric and air pump? I have an organic vapor respirator, but where should this be done without a fume hood? Also, where do you store the used solution? Thanks

If you plan on refining it, I wouldn't melt it. It will dissolve much faster if it's a powder/foils. If it's just powder/foils then hydrochloric and house hold bleach will put it into solution, then drop out with your method of choice.

Bull nose pliers really cuts through plastic /metal and if you can get both jaws around it it pries away pretty easily

...go bad and not give you a good result. If this is the case you should check it against a standard solution you know has gold just to be sure. AP can dissolve Gold if there was too much oxidizer added. Your best scenario is to decant the solution and if there is no gold in there treat the...

Hi Yggdrasil The AP started as HCL and Bleach on a bubbler. Then I was advised that bleach only lasts 24 hours. This 24 hour period is where some gold dissolved? The copper in solution replaces gold in solution and creates a brown sand? I discussed this with a senior member in forum. Is it...

Dont. If you do not know what you sell how do you set the price? It will result in one person being burned instead of both being happy. Foils from what we call AP are generally dirty even though they appear clean. They need to be refined further. That way you will know what you have and what you...

Were you concerned about recovering the copper or do you want to drop everything out? Here where I live, we have what they call "Amnesty day". If I remember correctly, it's twice a year where the residents can dispose of all their chemical wastes....no questions ask. Just don't roll up there...

...big amounts of pcbs, minimum I leach 50 Kg per barrel, and batch is about 10 barrels so we are talking about 500 Kg of circuit boards per batch. AP leaching will help me also to get all ic chips and other small components, much more better than seperating small components from circuit boards...

If all copper dissolved, there still is too much oxidizer in there. This can aslo hold back a good stannous reaction. Keep adding copper. Did you dissolve it warm or at room temperature? My best guess: I think there may have been copper chloride in solution that showed up as a false positive...

I started a small batch of BGA chips in AP and started using heat for the first time. I noticed the solution turned crystal clear when the temp got hot the after turning off the heat it went right back to the normal familiar yellow. Anyone know why?

Maybe you can wash it off in hot dilute nitric? Nice bar by the way.

...layer without effecting base metals, I wonder if this method is well tested by anyone here, I get tired from leaching circuit boards in hcl then AP then collect gold foils and if pins not made from copper I have to use another method than AP to strip gold foils. And can I use same...

Do not use all bold or all cap text, it is considered shouting. And do not double post. I deleted your other post.

...and deflated all I could using the H2O method of electrolysis. This resulted in the following black sludge (emptied into beaker from filter paper). I also had some silver switch connectors (some on brass, some on copper) along with a fair amount of silver plated aluminium rods (from inside 5G...

Guessing iron compound. I've never used AP for cpus. Gather the yellow powder and perform standard metal salt identification testing. Steve

Welcome. If you add HCl and NaOH you will get table salt and water. We usually use Cupric Chloride leach (aka AP) for this. Here are some links for your studies: We ask our new members to do 3 things. 1. Read C.M. Hokes book on refining jewelers scrap, it gives an easy introduction to the...

It will not generate any appreciate amount of smoke or fumes if you pyrolize (with after burner) first as you always should. You can actually use barbecue coals and forced air for this. It is however good to remove as much plastic as possible first. I would have used AP first for the foils...

I think you need to reread the advice given. No one has recommended HCl Bleach first. That is used to dissolve the Gold. Nothing else.

Can you guys plz tell me if it is possible to depopulate small boards especially with LEDs, resistors and mlcc's on with ap solution.

...plastic connector just where gold plated plates are, I prepared about 5 kg of cut of ends like that (I think it took a couple of thousand individual connectors & countless hours), and processed in AP, i think i got about 1g of gold, conclusion - it is not worth the work to cut them off cables;

Did the solution change color over time?