Emulsion Liquid Membrane in Ammonium paratungstate Production

The concept of emulsion liquid membrane is proposed by N.N.Li in 1968, and it has attracted researchers from many countries. Because it simulates the activity of migration of biofilms on the migration mechanism, it enables materials highly enriched against the concentration difference. It is the combination of extraction and back-extraction process carried out in a system at the same time, the reaction takes place on the surface area of the extremely thin film interface, and there is carrier on the membrane, so its kinetic advantages are much more than the reaction takes places in solution, also the mass transfer rate, efficiency and selectivity than the extraction process. This new technology is currently developing forward unit operations. University of Graz in Austria is first one to started the international industrial application, for the recovery of zinc from waste water, followed by the Institute of Environmental Science, South China University of Technology for the removal of phenol from wastewater.

carbide Threading Inserts