HOW TO REMOVE GOLD FROM COMPUTER FINGER BOARDS SCRAP

[camtender]

Okay, who knows what chemical this eBay auction is using to remove gold from computer boards?

http://www.ebay.com/itm/REMOVE-GOLD-COM ... 2eba926940

[Neckro]

Aqua Regis? I know it's spelled wrong, but that's what I think they do.

[OldPeddler]

Here is a web sight I found, that might help.

http://shorinternational.com/AquaRegia.php

[Engineer]

The ebay listing says he isn't using aqua regia. I'd guess he's using some sort of solvent to dissolve the glue that holds the gold to the board.

[Delawhere Jack]

Keep in mind that you'll need tens's of thousands of cards or dimms and such to get a single ounce of gold.

Aqua regia (English: 'royal water') or aqua regis ('king's water') is a highly corrosive mixture of acids, fuming yellow or red solution, also called nitro-hydrochloric acid.

The mixture is formed by freshly mixing concentrated[1] nitric acid and hydrochloric acid, usually in a volume ratio of 1:3, respectively. It was named so because it can dissolve the so-called royal metals, or noble metals, gold and platinum. However, ruthenium, tantalum, iridium, osmium, titanium, rhodium and a few other metals are capable of withstanding its corrosive properties.[2]

From wikipedia:

http://en.wikipedia.org/wiki/Aqua_regia

[galenrog]

Google up "lazersteve". Should send you to Steve's gold recovery website. Lots of good info and videos.