The principal sources of rare earth elements are the minerals bastn�site, monazite, and loparite and the fractional crystallization and liquid-liquid extraction during the late 1950s and early 1960s.
42.
The determination of the free energies of ion transfer between aqueous and organic solutions is of great importance for biology, physiology, pharmacy, and for liquid-liquid extraction in chemistry.
43.
He is known for his research on liquid liquid extraction at Alagappa College of Technology, Anna University, and his contribution for the establishment of several chemical industries in India.
44.
The idea behind TAPPIR is to use the advantages posed by SIRs, namely low extractant loss due to immobilization in the pores and less emulsification than in liquid-liquid extraction.
45.
It permits precise control in time and space over small processed elements in the course of the process, a degree of control that is not possible in any other liquid-liquid extraction method.
46.
Liquid liquid extraction is possible in non-aqueous systems : In a system consisting of a molten metal in contact with molten salts, metals can be extracted from one phase to the other.
47.
TCPL transports natural gas in Canada and the U . S . as well as having interests in gas-fueled electric power generation, gas liquids extraction and carbon black manufacturing in North America.
48.
It is also helpful in solving liquid liquid extraction problems, because an extraction system can also be represented as a series of equilibrium stages and relative solubility can be substituted for relative volatility.
49.
This solution is subjected to a number of liquid-liquid extraction steps to remove metallic impurities ( most importantly niobium ) before being treated with potassium fluoride to produce K 2 [ TaF 7]
50.
Desorption atmospheric pressure photoionization ( DAPPI ) is a solid-liquid extraction ambient ionization method that enables the direct analysis of samples deposited on surfaces by means of a jet of hot solvent vapour and ultraviolet light.
