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Separation of tantalum and niobium by solvent extraction
(North-West University, 2012)
Niobium (Nb) and tantalum (Ta) are found in the same group (VB) of the periodic table of elements and therefore have similar chemical properties, which is the reason why they are difficult to separate. They are usually ...
Product distribution directed modification of ZSM–5
(2012)
Ethylene and propylene are important chemical feedstocks for the production of polyethylene and polypropylene. Ethylene and propylene can be produced by various methods including steam cracking of liquefied natural gas ...
Multivariate data analysis using spectroscopic data of fluorocarbon alcohol mixtures
(North-West University, 2012)
Pelchem, a commercial subsidiary of Necsa (South African Nuclear Energy Corporation), produces a range of commercial fluorocarbon products while driving research and development initiatives to support the fluorine product ...
Membrane based separation of nitrogen, tetrafluoromethane and hexafluoropropylene
(North-West University, 2012)
Pure fluorocarbon gases can be sold for up to 30 USD/kg, if they were manufactured
locally. Due to the absence of local demand, South Africa at present has less than 0.3 % of the fluorochemical market and most fluoro–products ...