EnviroGold Global Ltd. (Toronto, Ont., Canada; www.envirogoldglobal.com) has filed a patent application for a proprietary electrochemical process designed to achieve advanced metal recoveries from refractory ores with reduced capital expenditures (capex) compared to industry standard solutions. “The residual metals contained…
A hydrometallurgical process for recovering vanadium from slag, a byproduct of steelmaking, has been significantly scaled up. Previously deployed at mini-pilot and bench scales, the process, developed by Neometals Ltd. (West Perth, Australia; www.neometals.com.au), has now been expanded by a…
Using a vast collection of experimental distillation-column data, sieve tray stability, and its influence on efficiency, are explored in terms of several physical and mechanical properties For trayed distillation columns, the concept of tray stability was introduced by the author…
Buildup of biofouling on membranal surfaces necessitates treatments with corrosive chemicals, such as hydrochloric acid, and even replacement of membrane cartridges, which can be costly in desalination operations. A new coating, developed in the laboratory of Ran Suckevereine at Kinneret…
Until now, waste tires have been used mainly for recovering energy. Only small proportions of the carbon black contained in these tires are recycled, since the mineral ash generated by pyrolysis consists of about 20 wt.% of additives used to…
According to statistics from the World Bank, thousands of tons of valuable minerals are imported to Germany from Chile every year, including raw materials for lithium-ion batteries. But their extraction causes ecological and social problems. “The use of the limited…
Construction is underway of a prototype system designed to extract natural bioactive product compounds from plants using supercritical glycerin as the extraction solvent. The initial target for the process is to extract cannabidiol (CBD), tetrahydrocannabinol (THC) and other active compounds…
In order to handle the growing volume of waste textile materials, recycling processes must begin significantly scaling up. Lenzing AG (Lenzing, Austria; www.lenzing.com) and Södra (Växjö, Sweden; www.sodra.com) are joining forces to scale up the OnceMore textile-recycling process, which is…
Although the oceans contain about 5,000 times more lithium than what is found on land, the low concentrations (about 0.2 parts per million (ppm)), as well as the predominance of other larger ions (sodium, magnesium and potassium) makes Li extraction…
Physical adsorption phenomena play a critical role in many separation and purification processes, including separations of industrial gases, purification of gases, moisture removal from fluids, water purification and others. Adsorption is a surface phenomenon in which a fluid (gas or…