Perfluorobutanoic acid

Other perfluorinated ionomer membranes, chemically very similar to Nafion, are also available commercially. Aciplex, manufactured by the Asahi Chemical Company, is very similar to Nafion, except that it has perfluoropropanesulfonic acid side chains. Flemion (Asahi Glass Company), in contrast, possesses perfluorobutanoic acid functions. 

It was noted that for the perfluorobutanoic acid salts of the alkaline earth metals the yield of perfluoroalkene increased with increasing weight of the metal cation (vide supra). Decomposition of the barium salt gave hexafluoropropene in 78% yield while the reaction with the magnesium salt gave > 5 % of the same product. An exception was ammonium per-fluorobutanoate (4) which formed no alkene, but instead gave an almost quantitative yield of... 

Trifluoromethyl group was introduced in furfurol by its reaction with trifluoro-acetic acid and xenon difluoride. Xenon (II) trifluoroacetate intermediate undergoes decomposition under reaction conditions to yield carbon dioxide and trifluoromethyl radical, which reacts with furfurol giving the product." The perfluoropropyl furan derivative 26 was prepared" using XeF2/perfluorobutanoic acid mixture. 

Keywords Groundwater Leaching Perfluorobutanoic acid PFC Sorption... 

Concentrations of PFCs in the Rhine River were monitored extensively in Germany and in the Netherlands as can be seen in Table 1. Background values for most PFCs were in the low ng/L range, i.e. <10 ng/L. Mainly, perfluorobutanoic acid (PFBA) and perfluorobutane sulfonate (PFBS) were found in high concentrations in the Rhine, and PFOA and PFOS in other rivers. Other short chain PFCs ([Pg.80]

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