Fluorination catalysis, early development

Fluorination, 30 293-294 catalysis, early development, 39 332-334 Fluorine isotope, NMR properties, 33 213, 274 p-Fluoronitrobenzene, 42 168, 171 Fluorotetrasilicic mica... 

The CFC replacements need to be nontoxic, nonflammable, and have significantly lower, or zero ozone depletion potentials. Many organic or aqueous-based systems, that do not contain chlorine or fluorine, have been developed for some applications, whereas others will still use hydrochlorofluorocarbons (HCFCs) and hydrofluorocarbons (HFCs). Unlike hydrocarbon catalysis, the presence of hydrogen, chlorine and fluorine in the same molecule creates a very large number of isomeric possibilities. As a result of many years of careful study, the early list of >800 potential candidates has been narrowed down to less that a dozen viable molecules and their blends and azeotropes [3]. Many of these are now being commercially manufactured as society approaches the January 1996 phaseout date of the Montreal Protocol. 

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