Cutting edge technology to
create and improve chemistry.
METOXS innovates in a wide array of spaces given the nature of our chemical discoveries. Our transcendental approach allows for similarities in technology to be shared across disciplines. At METOXS we are passionate about innovating in spaces where specific needs must be met. This has allowed our group to make advancements in mineral extraction, waste product management, energy optimization and novel green building materials. We are moved by innovation to further develop our portfolio of technologies through R&D, active marketing and implementation to solve challenging and important issues faced by several industries.
Below you will find some of our active efforts which are engaged in enhancing the fundamental nature of the fields in which we have a presence.
Ultra low temperature reference electrodes for potential measurements. One of the main challenges in corrosion today is making stable measurements of potentials in this regime. Another application is control of processes under severe conditions where this information is an invaluable asset in metal recovery.
Our proprietary technology that uses a patent protected chemical process for hydrogen sulfide production. This allows for metal recovery from metal containing effluents in a simple, cost effective and modular way. There is no need for complicated infrastructure with existing technologies. Applications include mining, galvanoplastics and supplements whereby hydrogen sulfide is a requisite component.
High temperature reference electrodes for potential measurements. One of the main challenges in corrosion today is making stable measurements of potentials in this regime. Another application is control of processes under severe conditions where this information is an invaluable asset in metal recovery.
The potential of a metal or metal alloy is critically required to be determined to perform meaningful measurements. To determine this potential, a reference electrode is required to control the potential of the metal sample under investigation. The first reference electrode that ever existed is the standard hydrogen electrode (SHE) and its potential was conventionally defined to be zero under standard conditions. Several reference electrodes were developed and their standard potentials were referred to the primary reference electrode, i.e. the SHE. The main feature of a reference electrode is to have a constant potential within a range of temperatures. The current in use reference electrodes normally use aqueous solutions of the chemical species inside the electrode to establish the standard potential of these electrodes. Therefore, it is practically impossible to use these electrodes for measurements above 100°C. They can be used at temperatures as below as -20°C if some special additives are added to depress the freezing point of the aqueous media inside the electrode.
Recently, there is much need to perform measurements at temperatures much lower than -20°C, for example corrosion monitoring of oil pipelines passing extremely cold areas in which the temperatures can reach -50°C or lower. The current reference electrodes cannot be used under such extremely cold temperatures because the aqueous solutions inside these electrodes will freeze and this will result in breaking the electrode case and/or giving no potential measurements as there will not be an ionic conduction between inside the electrode and outside it. Therefore, a non-aqueous media inside the reference electrode is required to establish the standard potential of that electrode and thus can be used safely in these areas of extremely cold temperatures.
This is our flagship process that involves using organic salts to leach even the most difficult of ores. Main targets for this technology are refractory ores (i.e. pyrite containing) that represent a major obstacle in precious metal leaching. This process can also be applied to traditional mining where alternatives to hazardous chemicals remains a challenge.
Molten salts are low vapor pressure liquids for moderate to high temperature applications. Molten salts are used as a heat transfer fluid in nuclear reactors and for concentrating solar power (CSP). CSP transduces solar to thermal to mechanical to electrical power. Abundant inexpensive chlorides form molten salt stable to 1300o C and in anaerobic form which are compatible with Hastelloy nickel alloy housings. Mixing ionic chloride salts with covalent chlorides gives low melting eutectic salt mixtures, which are stable at high temperatures.
The aerobic salt with airborne water and oxygen can be used to extract metals from earths rich in copper, silver and gold, which can then be deposited in the metallic form by applying electrical power between immersed electrodes for clean and efficient mineral processing.
It is known that the gold recovery rates from the refractory gold ores using the traditional cyanidation processes are low because of multiple chemical and physical reasons. Therefore, finding other alternatives to the conventional cyanidation has become important not only to improve the recovery rates but also to protect the environment from the significant pollution from the toxic cyanide compounds.
Novel fly ash based building materials. Technology to achieve very high compressive strengths. These materials do not only exhibit excessive strength but are also water resistant and easy to prepare industrially.
Revolutionary chemistry for leaching using hydrometallurgical methods. This has been tried for decades in the mining industry, thanks to Metoxs this has been solved. It represents an enormous change especially for the copper extraction industry.
A new and useful method for processing copper concentrate. The primary sulfide minerals of copper have been difficult to leach for direct copper extraction. In particular chalcopyrite has been observed to undergo a type of passivation under a variety of oxidative leaching conditions. Chalcopyrite is one of the most abundant copper-bearing minerals, accounting for approximately 70% of the world’s known copper reserves. Most of the currently proposed leaching processes are based on sulfuric acid with ferric ions and/or dissolved oxygen as oxidants.
The method utilizes a high concentration of sulfuric acid and maintains the sulfuric acid at this high concentration level in a glass-lined reactor for obtaining high copper extraction with short residence times. The present method requires the injection of oxygen gas in order to regenerate the acid by reaction with sulfur dioxide and water generated during the sulfation process. The method introduces vigorous agitation and appropriate agitation in order to avoid passivation by interference of sulphates, which may be formed during the sulfation process. Accordingly, oxygen gas is more efficiently used in the regeneration of sulfuric acid with high permanence and short residence time in the reactor gas.
The concentrates used in this method do not require regrinding since they are obtained directly from a flotation process, requiring only drying. To ensure that all chalcopyrite has reacted, the method proposes a flotation process for recycling the chalcopyrite. This has been a major concern of the mining industry which the ARV LEACHTM process presents a viable solution.
Novel proprietary technology combining HeatXC for water desalination. The device is integrated to a conventional multi-effect-distillation water treatment system to achieve high energy efficiency and 100% water extraction using high temperature thermal energy.
Proprietary and patented heat exchangers for energy harvesting. These systems can be used for energy extraction from smelting facilities using particles of different sizes and different characteristics. This robust feature of the system allows for more versatile solution to waste heat management.
Our patented smart floating panels are extremely versatile for use in a variety of applications. These range from energy harvesting (floatovoltaics) to plastic recovery at open sea to mine tailing coverings. The unique design makes applying this optimal for a wide range of applications.
A concept and the associated device of thermal-driven water treatment to fully separate water and solute have been proposed. The device is integrated to a conventional multi-effect-distillation water treatment system to achieve high energy efficiency and 100% water extraction using high temperature thermal energy.
In the water treatment system, water for reclamation is sprayed into droplets which fall into hot, dry air and creates very effective convective heat transfer between water droplets and hot airflow. During the heat transfer process, water is vaporized for pure water collection while the crystallized solute from the reclamation water settles down to the bottom for collection.
The current study investigates the energy consumption versus water treatment in the system, the correlation of the size of droplets and the temperature of hot air, and the mass heat distribution in subsystems or devices. Metoxs has a new product (SALXCTM) for desalination combined with our heat exchanger and the ability to recover salts for storage or use in other applications.
Recently, there has been a growing interest in the use of particulate matter for energy storage. Generally, particulate matter such as sand or ceramic particles can be heated by an energy source. The heated particulate matter can then be stored in an insulated container and the energy can be subsequently transferred from the particulate matter to another system for future use. For example, recent work has focused on heating ceramic particles using concentrated beams of sunlight. Using concentrated beams of sunlight, such particulate matter can be heated to about 700°C. Systems and apparatuses that can efficiently convert the energy stored in such particulate matter to other forms of usable energy is highly desired.
While some forms of particulate matter can intentionally be heated for subsequent energy conversion applications, as with the ceramic particulate as described above, other particulate matter, having a high temperature and thus large amount of stored energy, can be made as a by-product during regular industrial practices. For example, as a by-product of smelting or refining processes to purify metal-containing ores or crude metals, respectively, a large amount of high temperature molten slag is produced. The produced slag by-product is then separated from the desired metal product and generally allowed to cool naturally in an open environment or with the aid of water. Upon cooling, the slag forms into a solid which may be a mixture of, for example, silicates, sulfides, chlorides, fluorides, and other chemical components or compositions. The solidified slag may then be granulated for use in the production of ballast, concrete or glass compositions.
During the cooling process, a considerable amount of energy is liberated from the slag. As energy is released from the molten slag, it will begin to solidify and can be granulated by agitation. In general, solidification and/or granulation of molten slag can take place at temperatures ranging from about 700°C to about 1100°C, depending on the composition of the slag. Our technology is capable of extracting this energy for storage for later use or to be directly consumed for other processes on site.
(c) 2017 Metoxs Pte. Ltd.