Perfluoro alkane carboxylic acid purifcn. - by extn. of potassium salt from aq. soln. using water miscible organic solvent

Perfluoro alkane carboxylic acid purifcn. - by extn. of potassium salt from aq. soln. using water miscible organic solvent

Perfluoro alkene carboxylic acids are sepd. from aq. soln. by extracting K salt from conc. aq. soln. using an organic solvent which is (partially) water-miscible. Acid salts are very water-soluble and easily contaminated with inorganic salts if aq. soln. is evaporated. Extn. or distn. of free acid c...

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Hauptverfasser: GROSS,UDO,.DR, DIETRICH,PETER,.DR, ENGLER,GUENTER,.DR, FERSE,ARMIN,.DR, GRIMM,HARALD,.DR, SCHULZE,JUERGEN,.DR, LUNKWITZ,KLAUS,.DR, PRESCHER,DIETRICH,.DR, WALLBRAUN,ASTRID
Format: Patent
Sprache:eng ; ger
Schlagworte:
ACYCLIC OR CARBOCYCLIC COMPOUNDS
CHEMISTRY
METALLURGY
ORGANIC CHEMISTRY
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Zusammenfassung:Perfluoro alkene carboxylic acids are sepd. from aq. soln. by extracting K salt from conc. aq. soln. using an organic solvent which is (partially) water-miscible. Acid salts are very water-soluble and easily contaminated with inorganic salts if aq. soln. is evaporated. Extn. or distn. of free acid causes corrosion. Method gives high purity, yields. Solvent is pref. 3-5C alcohol, esp. isopropanol, 3-7C ketone, dimethyl formamide or sulphoxide.