Aqua Regia Gold Recovery | Gold Recovery | Gold Refining with Aqua Regia/How to refine gold with Aqua Regia

Those who want to learn the gold recovery process from e-waste extensively use the keywords how to recover gold from aqua regia. This is because most people have the conception that the aqua regia process is the only and  best method to extract gold from e-waste. There are many other methods to remove gold from e-waste, and aqua regia is one of them. The economic viability and easy availability of the material or chemicals used in the gold recovery process are the first considerations when choosing a method to remove gold from e-waste.

Undoubtedly, the aqua regia method is an easy gold recovery process. To prepare aqua regia, you need to mix one part of nitric acid and three parts of hydrochloric acid. These acids are very corrosive and produce toxic fumes. So, while mixing them, you should be careful to avoid splashes, as they might cause burns. In case you happen to have some splashes on your body, you should immediately wash them with plain water.

Jewellers normally use aqua regia to get their gold from old jewellery, scrap jewellery pieces, filings, jewellery bench work, etc. One kilogramme of scrap jewellery can be digested by 3.5 to 4.5 litres of aqua regia. You can use Teflon plastic or glass for the aqua regia gold recovery method. First, gold scrap should be placed in the digesting pot, and then aqua regia should be poured onto it slowly and carefully. The scrap metal begins to dissolve into the aqua regia. The aqua regia is poured until the whole metal is dissolved. Once the metal undergoes digestion, we filter the solution. If only gold metal is present in the filtered solution, the colour of the solution is yellowish; if other metals such as copper, nickel, etc. are mixed in the solution, the colour of the solution is green. We should neutralise the excess nitric acid in the solution to ensure the easy and complete precipitation of gold. It is either done by boiling the solution to almost dryness or by adding some chemical that neutralises the nitric acid.

By now, you have only half the answer to how to recover gold from Aqua Regia. Precipitating a hundred percent gold from the gold chloride solution is not as easy as it sounds. Many precautions are taken to ensure the complete recovery of gold from the aqua regia solution, and the correct choice of the gold-reducing chemical is also a very important part of this gold recovery process. Occasionally, for various reasons, some particles of other metals may also settle to the bottom with the gold dust. To ensure the maximum purity of gold, it may be necessary to repeat the entire process.

Everyone is welcome to ask us any questions about the gold extraction methods from e-waste, either by email or through telephonic conversations. Our contact details can be found on our website.

 

How to Recover Gold from Cell Phones/Gold Extraction from Cell Phones/Gold from Mobile Phones

People are just amazed when they hear that there is gold on mobile phones too. Until some time ago, the common notion was that in electronic waste, computer scrap was the only source of gold. And people just did not value their cell phone scrap; they would simply throw it away or sell it at a very cheap price to any plastic scrap buyer. Ever since the demand for mobile scrap grew, more and more people started thinking, What is there in it that so many people are looking for mobile phone scrap? And their curiosity took them to the fact that there is lots of gold in cell phone scrap. The fact is that you get more gold from mobile phone waste in comparison to computer waste. And a broken or defective mobile set that you simply throw away is worth no less than Rs 200 (USD 4.44). The scraps of cell phones are so costly because their motherboards are gold-plated, and all the connectors used in mobile phones are also gold-plated. And the chips mounted on their motherboards also contain a good amount of gold, palladium, and silver. And the ceramic capacitors used in cell phones have palladium and silver in them, as well as sometimes gold. As a result, precious metal recovery from cell phone waste is a profitable business. This is the reason why many people on the net search for the answer to how to recover gold from cell phones.

You have to employ three different methods to extract precious metals from mobile phone waste. Cyanide recovery can remove gold from motherboards and connectors. I mentioned in my other articles that the cyanide recovery process is quite economical, and we get complete recovery of gold through this. But cyanide, being a very harmful chemical, should be handled with care and neutralised after use. To remove gold through the cyanide gold recovery process, you have to first take plain water in a steel pot and boil it on a gas stove, or you can take a Teflon plastic vessel and boil the water with a heating rod. Take the quantity of water in which you can easily immerse cell phone motherboards. The amount of cyanide that you dissolve in water depends on the weight of the scrap and the quantity of water that you use. Use commercial-grade sodium cyanide instead of potassium cyanide. Suppose you have 10 kilogrammes of motherboards and 15 litres of water. You may first add 50 grammes of sodium cyanide to the water. Try to dissolve the cyanide in the water with the help of a wooden stick, and later on, you may add more cyanide to the water if need be. The strong presence of oxygen should be maintained in the cyanide solution, for which different types of pumps are available on the market. The more oxygen in the solution, the better the dissolution of gold in the cyanide solution. Once the gold has completely been removed from the motherboards, the boards should be taken out of the solution, and the solution should be filtered with the help of filter paper. You can easily separate the gold from the cyanide solution by adding zinc dust to it.

I know the question of how to recover gold from cell phones is still echoing in your mind because your question has not been fully answered. You still have to know about the gold and palladium recovery from the chips and ceramic capacitors, respectively. Well, as for the recovery of gold from chips, you have to first burn them in an environmentally friendly way, then grind them into a fine powder and melt all the metals present in the powder in a crucible by mixing borax and lead with it. After melting, you will get a solid mass of the mixed metals, such as gold, copper, nickel, etc. You can easily separate gold from it through an electrolytic process.
As for the recovery of palladium from ceramic capacitors, the capacitors first have to be crushed to a fine powder, and then the palladium present in the powder is melted in a crucible, as mentioned above, with some lead and borax. After the metal melts in the crucible and settles to its bottom, pour it into a mould to get a solid mass of mixed metals such as palladium, lead, etc. You can reclaim palladium either chemically or electrolytically.

You are always welcome to consult us on any methods of precious metal recovery. We are always at your service and will extend our warm support to you.

 

Non cyanide gold recovery Process/Processors/CPUs/Mobile phones/Circuit ...

Gold from CPUs Processors/Gold Extraction from Processors/Gold Recovery from Chips/How recycle Chips Processors

From one kilogramme of CPU (386 and 486), we get 6 to 6.5 grammes of gold. Everyone desires a CPU, including you and me. CPUs have gold wires inside them. It is very easy to recover gold from the CPU. You can make it your part-time or full-time business, too. When we consider gathering CPUs in large quantities, it may seem daunting, but it's actually not that difficult. In India, the e-scrap business is a very organised trade. We have a great number of scrap dealers in every city, and these scrap dealers have contacts in big companies from where they lift large quantities of e-scrap, and each scrap dealer is associated with numerous mobile scrap collectors who go door to door or shop to shop to collect e-waste. And, this way, these wholesale scrap dealers have great quantities of e-scrap. And you may purchase just about any kind of e-waste item from them.

If you want to recycle gold from CPUs and make it your part-time or full-time business, I can assure you that it is profitable. You need a 50-square-foot area of land or at least a 20-foot x 20-foot properly ventilated room.

The basic requirements of equipment for this business are some plastic tubs, one water storage tank, one small furnace, one blower, one exhaust fan, one large heat-resistant glass bottle, two pairs of medium- and full-size gloves, one hammer, a pair of tongs, two or three different types of pliers, cutters, files, a gas stove, etc.
As for chemicals, you can use either aqua regia or the cupellation process. The Aqua Regia method is more preferable. Old CPUs have a golden cap on them, but the latest CPUs don’t have a golden cap. You must cut or break them into small pieces so that the chemicals can reach inside and react with gold. To prepare aqua regia, you have to take one part of nitric acid (HNO3) and three parts of hydrochloric acid (HCL). Prepare the solution according to the requirements. Don’t make too much of it. Place the CPUs in the plastic tub and start putting aqua regia on them gradually.

Aqua regia will start the reaction with the metals in the CPUs and produce toxic fumes. So, don't stand too close to the tub. When the reaction slows down, see if the metals have dissolved fully into the solution. If the metal is left, add more aqua regia to the solution and keep pouring the acids slowly till the metals are completely digested. This reaction turns gold into gold chloride. Now we need to separate the remains of the CPUs from the solution and wash them with plain water two to three times to remove gold chloride from them. Mix this water with the solution, and filter this solution through a filter paper.

To achieve 100% gold recovery, it is crucial to carefully and patiently remove the gold from the solution. For this, you may contact us either by phone or through the mail.

 

Gold Recovery from Chips/How to Recover Gold from Chips/Gold Extraction from Chips

People think that gold recovery is limited to computer chips only. Every electronic device has a motherboard, and that motherboard has some chips mounted on it. It could be a DVD, a mobile device, or just any electronic device. We get gold from all the chips. Gold is an essential part of a chip. It takes the form of very thin wires inside a chip. Undoubtedly, extracting gold from chips is a very profitable business. I receive numerous calls every day, and most of the people ask me how to recover gold from computer chips. Before starting the business of gold recovery from chips, we must have the correct knowledge of the precious metal content of one pound or kilo of chips or integrated circuits so that we can make the right purchase. Well, we can’t obtain the same quantity of gold from all the chips. There are many factors behind it. Chip manufacturing companies used a lot of gold at the early stage of chip manufacturing because, at that time, gold was very cheap. As gold became more and more expensive, chip manufacturing companies reduced the quantity of gold in them. But certain chip manufacturers maintained their standards, and they did not reduce the quantity of gold so heavily. But they had to sell their chips at higher prices. We get a comparatively lesser quantity of gold from chips made in China.

Now, the question is: how do you recover gold from computer chips? Well, it is not so easy. Many companies have made a big investment in installing very expensive machinery to extract gold from chips and other precious metals from different types of e-waste. The first and foremost thing is not to pollute the environment when you remove gold from chips. Pyrolysis and hydrometallurgy are used to extract gold from chips. Chips are first incinerated and crushed into a fine powder, and then mixed metals are either melted or treated chemically to separate gold from them.

In India, some people are engaged in gold extraction from chips in a manner that is not environmentally friendly. In the open air, they simply burn chips. They are unaware that this type of electronic scrap burning produces toxic fumes. Poor people engaged in this kind of work are not at all aware of what kind of health risks they are exposing themselves to. So, my advice to those who want to start this business is to have proper knowledge about it so that they can take sufficient precautionary measures.

Since obtaining gold from chips is a very profitable business, a lot of people all over the world are interested in starting this business, either on a small or large scale. These days, there are numerous videos on the net telling people how to get gold from chips. But they forget one thing: the use of chemicals without proper guidance can also be hazardous. I am not trying to scare anybody unnecessarily or discourage people from doing this business, but the fact of the matter is that it is always safe to have a trained teacher guide us at the initial stage of a business, especially one of this nature.

We have developed some safe, environmentally friendly methods of gold extraction from different kinds of e-waste. And we are always ready to provide solutions to your problems regarding gold 

recovery from e-waste.