gold recovery from pc boards using hypochlorite

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Step-by-Step Gold Recovery From Circuit Boards ...

Jan 21, 2014· They must be stripped from the board before the gold can be recovered. This process is performed either by hand or machines, and involves removing any non-gold materials from the board, including integrated circuits, screws and batteries. Once these extra pieces have been removed and safely discarded, the actual gold reclamation process can begin.How do you remove gold from circuit boards without chemicals?The boards from 100 computers could yield as much as $3,000 worth of gold. And you might be able to get older computers for free, just by offering to haul them away. The circuit boards found inside a single newer laptop can contain gold worth between $15.00 and $25.00.askinglot.comHow to Remove Gold from Circuit Boards: 12 Steps (with ...www.wikihow.comHow to Extract Gold From Electronics : 11 Steps (with ...www.instructables.com

Hypochlorite Leaching of Gold Ore

Nov 08, 2017· An acidic hypochlorite solution can be added to the autoclave for pressure oxidation and extraction of the gold at the same time. It required 50 % sodium hypochlorite or 120 kg/t available chlorine to extract 97 % of the gold from the ore. When 3 % HCl and 10 g/L NaCl was added to the leach solution, the same amount of gold could be extracted with 24 kg/t available chlorine under the

Gold Recovery With Bleach Computer Scrap Pentium

27:12Dec 04, 2016· How to recover gold with hydrochloric acid, bleach, hydrogen peroxide, and Stump Out - NO NITRIC ACID.To Contribute: https://paypal.me/sreetips?locale.x=en_US sreetips

Gold Recovery : 8 Steps (with Pictures) - Instructables

Put the gold fingers and clean circuit boards in the coffee pot, in another container mix two parts muriatic acid and one part hydrogen peroxide and add to the coffee pot until it just covers the gold fingers and wait a week giving it a stir daily.

How to Extract Gold From Electronics : 11 Steps (with ...

Then, you should remove the PCB and scrape off any gold still attached to the PCB (you should be wearing gloves if performing this step by hand) and fully submerge it into a cup of water. Then, add some add some water to the existing solution full of gold (I recommend doubling the amount of solution with

HOW to Recover GOLD from Scrap VERY EASY With

15:27Mar 16, 2018· HOW to Recover GOLD from Scrap VERY EASY - No nitric acid needed HDcontact me : [email protected] kassi man

How to Remove Gold from Circuit Boards: 12 Steps

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"Gold Recovery for Dummies?" - Finishing

May 23, 2021· To the container, add 30 milliliter of nitric acid for every ounce of metal. To the container, add 120 ml of hydrochloric or muriatic acid for every ounce of metal in the container. 3. Allow impure gold to dissolve for an hour to overnight for complete dissolution.

Leaching of an oxide gold ore with

Jun 01, 2007· An oxide gold ore was subjected to chloride/hypochlorite leaching at room temperature. The effects of three factors, including Ca(OCl)2 vs. NaOCl, OCl− concentration, and HCl concentration on ...

Use of chloride–hypochlorite leachants to recover gold ...

Gold leaching optimization is achieved using a rotary drum reactor fed with the leaching solution, the process takes 6 hours and 95 % of gold recovery is obtained, the remnant gold from the ...

Sciencemadness Discussion Board - Gold Recovery Computer ...

Sep 18, 2015· The fingers still had some gold attached although the 'stubborn' one lost all the gold from one side and ~60% from the other. Stirring would have helped. The water was brought to approx 66mls and 7g of NaCl table salt was added, and stirred to dissolve. Then 17ml of some bleach claiming 36g/100ml hypochlorite was added.

Precious metal recovery from waste printed circuit boards ...

Nov 01, 2015· In a similar study conducted by Sheng and Etsell (2007) found a quicker leaching of gold from computer circuit boards using HNO 3 /HCl leaching media. However, the reactive systems used for these materials were aqua regia, well known for its highly corrosive nature and expensive too with low practical application.

Gold Recovery from gold nanoparticle waste - Gold Refining ...

Jun 24, 2011· The gold np waste has Pc-4 and polyethylene glycol as part of the complex as well. We have been heating the reduced waste to remove the organics and it has worked, but for waste that contains larger amounts of organics, we have not had much luck.

How to Extract the Gold From Computer Circuit Boards | Our ...

Apr 12, 2017· Computers and other electronic devices contain gold and other precious metals in their circuit boards. As consumers upgrade their electronic gadgets, the precious metals remain trapped in piles of waste. There’s about 0.2 grams (0.007 ounces) of gold in a typical mobile phone handset. Recovery of this gold requires ...

sodium metabisulfite use gold recovery

NC-13438 Scrap Gold Recovery Kit, 500g Sodium ... Seller 99.7% positive· Inquire Now NC-12597 Sodium Metabisulfite, 2.5kg Gold Recovery . Sodium metabisulfite, or sodium pyrosulfite, is commonly used to precipitate dissolved gold out of aqua regia and gold chloride solutions.

How Much Gold Can You Refine From a Bunch of Old Computer ...

Mar 01, 2016· How Much Gold Can You Refine From a Bunch of Old Computer Parts? Some! But not enough to be worth the trouble. By Eric Limer. Mar 1, 2016. Earlier this

How much Gold is in a Computer Desktop or Laptop?

Sep 24, 2019· How much Gold is in a Computer? The answer varies depending on the e-waste recycling source and computer board components. We believe it conservative to say with today's gold price, over $10 of gold gets layered in an average computer. In other words, 1/5th of a gram of gold can get pulled or withdrawn from an average computer's interior.

Gold Recovery from Gold Plated Pins and Connector Pins

Mar 11, 2017· Gold Recovery From Gold Plated Connector Pins. There are so many methods of gold recovery from gold plated pins. I will fully try to share all methods with you. This method is so easy. It can apply to medium size pins. In this procedure, You will not need to remove plastic from gold plated pins. That is the reason, I like this method.

How much Gold is actually in Gold Plated Pins?Gold recovery!

When autocomplete results are available use up and down arrows to review and enter to select. Touch device users, explore by touch or with swipe gestures. ... Choose board. Save. Saved from youtube.com. How much Gold is actually in Gold Plated Pins?Gold recovery! Here is a video,to show approximately how much gold is in gold plated Pins ...

Gold value in computer chips - Vintage Computer Chip ...

The good news is that many older computer chips can be worth more than their weight in gold due to hungry vintage computer chip & CPU collectors. Most popular with chip collectors are the early Intel microprocessor chips such as the first microprocessor - the Intel 4004, and it's successors - the Intel 8008 & 8080, as well as early Intel Memory chips such as the first RAM - the Intel 3101 ...

Sustainable and Selective Separation of PVC and ABS from a ...

GOLD RECOVERY FROM PRINTED CIRCUIT BOARDS OF MOBILE PHONES SCRAPS USING A LEACHING SOLUTION ALTERNATIVE TO CYANIDE. Brazilian Journal of Chemical Engineering 2018, 35 (3) , 931-942. DOI: 10.1590/0104-6632.20180353s20170291. Jianchao Wang, Weiqi Liu, Hui Wang, Chongqing Wang, Wenqiu Huang.

Multivariate study of a novel hydrometallurgical route ...

Nov 01, 2020· In the work of Montero et al. (2012), a column leaching technique was evaluated for the recovery of gold, together with silver and copper from the PCBs of obsolete computers. It was found that that even using a high cyanide concentration (4.0 g L −1) over a long period (15 days), a low silver recovery of 51.6% was achieved. However, the ...

CN102277497B - Method of reclaiming gold, palladium ...

The invention relates to the field of industrial waste recycling and in particular relates to a method of reclaiming gold, palladium, platinum and silver from a waste circuit board. The method comprises the following steps: (1) removing impurities of a waste circuit board which is subjected to extraction of copper, nickel, lead and tin; (2) separating and reclaiming palladium and silver; and ...