发明授权
US3632641A Process for making perfluoroalkylacetic acid 失效
制备全氟甘油酸的方法

Process for making perfluoroalkylacetic acid
摘要:
OLIGOMERS OF TETRAFLUOROETHYLENE (C2F4)N WHERE N IS 4 TO 6 REACT AT 25*-100*C. WITH AQUEOUS SOLUTIONS OF SODIUM OR POTASSIUM HYDROXIDES TO GIVE NOVEL OXYGEN-CONTAINING DERIVATIVES IN WHICH THE OXYGEN IS LOCATED IN HYDROXYL, CARBONYL OR CARBONYL GROUPS. WITH 5-15% BY WEIGHT SOLUTIONS OF THE HYDROXIDES THE TETRAMER YIELDS A TERTIARY ALCOHOL; THE PENTAMER YIELDS THE KETONE

(C2F6)2CF3)C.CH2COCF3

AND HEXAMER YIELDS A MIXTURE OF THE KETONE

(C4F9)C2F5)(CF3)C.CH2COCF3

AND THE KETONE (C2F5)2(CF3)C.C(CO).CF(CF3)(C2F5); WITH 30-60% SOLUTIONS THE PENTAMER YIELDS THE ACID (C2F5)2(CF3)C.CH2COOH. THESE OLIGOME DERIVATIVES ARE INTERMEDIATES FOR MAKING SURFACTANTS AND OLEOPHOBIC COMPOUNDS FOR APPLICATION TO TEXTILES AND LEATHER.
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