Nitric Acid Precious Metal Recovery
Take advantage of our Nitric Acid Precious Metal Recovery system to recover the precious metals from your waste streams. Our innovative process helps you get maximum value out of your waste streams in an environmentally friendly way.
Save money and reduce waste
Our advanced Nitric Acid Precious Metal Recovery system allows you to save money while reducing waste. With our fast and efficient process, you can recover precious metals from your waste streams quickly and easily.
No need for special equipment
Our innovative recycling process doesn’t require any special equipment or training. With our simple user interface and intuitive design, anyone can start recovering precious metals from their waste streams in no time!
Nitrogen species-catalyzed pressure-leaching is a process for the recycling of precious metals, specifically silver, gold, platinum, and palladium. The method uses a minimal concentration of nitrogen species as the oxidizer. These small quantities of nitrogen species can be derived from sodium nitrite or nitric acid.
This method has been applied to a variety of ores and concentrates, including gold and silver sulfide. In a closed loop, the leach reaction mechanism is used to solubilize the precious metals, which are subsequently recovered by a variety of methods.
In this procedure, sulfide minerals react with an acid solution to form elemental sulfur and iron. Iron is then dissolved. Silver is likewise solubilized in the leach. Typically, these precious metals are recovered via pyrometallurgical smelting.
As a result of these processes, the sulfide-bearing concentrates are recycled back through the system, making this method of recovering precious metals a very environmentally friendly method of mining.
Gold nanoparticles recovered by transmission electron microscopy
Gold nanoparticles (GNPs) are important for various applications in science and technology. They have been widely studied in the past decades. They are used in electrical contacts because of their high electrical conductivity and corrosion resistance. GNPs can be synthesized and characterized in several ways. These include the use of reagents and catalysts. In this study, gold nanoparticles were synthesized in the presence of nitric acid, a common reducing agent.
The reduction process produced polyamide-anchored gold nanoparticles, which can be used as potential catalysts. These are characterized by a relatively low particle uptake rate and narrow size distribution. The leaching tests showed that the gold nanoparticles were retained and bonded well to the PA12 matrix.
For the characterization of the particles, SP-ICP-MS was employed. This technique is a very sensitive method for analyzing nanoparticles from solutions. It is also suitable for measuring the nanoparticle size distribution. Various reagents for stabilization, such as di-(2-ethylhexyl) dithiophosphoric acid, alkylthiols, and phosphines, were used.
Disposal of aluminium salt solutions
The best way to dispose of aluminium salt solutions is to dispose of them in an appropriate manner. There are many ways to do this. Some people will opt to burn the metal for fuel and others will opt for a recycling program. Whatever the case, the process is safe and environmentally friendly.
Aside from its obvious uses, aluminium is also an excellent metal for use in the manufacture of electrolytic capacitors, insulators and the like. It also happens to be an excellent solute for precious metals such as platinum, palladium and gold. As such, it has been the subject of much research. In particular, scientists from Belgium have been successful at recovering a few of the most sought-after metals from metal wires and spent automotive catalysts.
However, these efforts have been hampered by the fact that it is difficult to extract a pure metal from its molten state. Fortunately, they did find a way around this problem.
Method for recovering precious metals from evaporite sediments
The present invention discloses a method of recovering precious metals from evaporite sediments using nitric acid. In particular, the recovery of palladium, platinum, ruthenium, iridium, and osmium. These precious metals are used in a variety of industrial processes, including nitrogen-based fertilizers and emissions-reduction catalysts.
The present invention describes a flow-through noble metal recovery stage 21 preferably constructed to contact the process stream for a period of time sufficient to achieve the desired level of solubilized noble metal removal. This stage can be operated in a continuous or semi-batch mode. Generally, this stage will remove less than 80 ppm of solubilized noble metal.
The recovery stage may be an in-line liquid filter system. Alternatively, it may include hot-gas filters. Regardless of its operation, the present invention aims to recover solubilized noble metals in a safe and environmentally sound manner.
Initially, a solids-depleted process solution was pumped through a column. A sample of the process stream was then passed through a fixed volume of noble metal adsorption media. At selected time intervals, the process stream was extracted for analysis.
Please contact LCR to discuss how we can help you to recover your lost PGMs.
London Chemicals & Resources Limited (LCR) is proud to announce its partnership with AGR S.A. in a new spent catalyst processing facility AGR Catalyst Recovery (AGR-CR). This new facility already has licenses and permits in place and is located in Logrezana, between Aviles and Gijón in the Principality of Asturias in northern Spain, the administrative and commercial centre for the region.
Building and construction work commenced in 2018 and the company was officially launched in 2020. We utilise the latest technology for processing spent catalysts, originating mainly from the European oil and gas industry, which are finally recycled to produce chemicals and ferro-alloys and returned to the industry.
London Chemicals & Resources Ltd is proud that AGR-CR will create many new jobs for the local community over the coming years.
At full capacity, the facility will be roasting many thousands of tonnes per year of spent catalyst arising from catalytic processes such as hydrodesulfurization (HDS), hydrodemetallization (HDM) and hydrocracking (HC). These spent catalysts include VMoNi, NiMo, CoMo and NiW.
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If you would like to speak to someone directly about our nitric acid previous metal recovery services, please call us on +44 (0)20 7183 0651 or visit our contact page, or contact us via LinkedIn and we will be happy to answer any of your questions.
