New applications or refinements of solvent extraction processes continue to be developed. Extraction is treated as an equilibrium stage process. Ideally, the development of a new extraction process includes the following steps: Select solvent. Obtain physical properties, including phase equilibria. Obtain material balance.
Staff reporter As part of an eight year study Curtin University researchers developed an improved glycine leaching technology that enhances the leaching rates for gold ore without using cyanide, a highly toxic chemical compound known to have detrimental effects on the environment and the human body.
Researchers from Curtin University have delivered a technology that will significantly enhance the leaching rates for gold ore without using cyanide. Currently, the industry is needing higher temperatures, glycine concentrations and oxygen addition levels when leaching gold with glycine in the absence of cyanide.
US based cleantech materials growth company Itronics has developed a Rock Kleen process that enables recovery of silver and gold from silver gold leach tailings, through the combination of Rock Kleen liquid and conventional gold recovery technologies. The Rock Kleen technology has the potential to extend the economic life of existing mines.
GlyCat is a process to enhance the dissolution of gold and copper in gold/copper ores where glycine is used as a catalyst with cyanide in a cyanide starved leaching environment. Gold Leaching with Nuisance Copper with GlyCat process Slag Turning wastes into viable opportunities
The most basic process was leaching the gypsum with 0.51 M H 2 SO 4 at room temperature . This process leaches about 50% of the REE from the gypsum without destroying the gypsum crystal structure. This makes the process efficient by limiting chemical consumption and makes the waste easy to handle.
Curtin University researchers have improved their award winning glycine leaching technology by significantly enhancing the leaching rates for gold ore, by using a low concentration of a strong oxidising agent known as potassium permanganate.
Leaching is widely used in the biological and food processing industries, such as the separation of sugar from sugar beets with hot water. The extraction of oils from peanuts, soybeans, sunflower seeds, cotton seeds, and halibut livers. In pharmaceutical industry, many products are obtained by leaching plant roots, leaves, and stems. In the ...