United States Patent Office Patented Sept
2,717,871 United States Patent Office Patented Sept. 13, 1955 2 pure form by a suitable procedure. Numerous other 2,717,871 derivatives can be made from these initial derivatives. ELECTROCHEMICAL PRODUCTION OF FLUCR0. Unsaturated acids as well as saturated acids can be used CARBON ACID FLUORE)E DERVATIVES as starting compounds and saturation is produced by Harold M. Scholberg, St. Paul, Min, and fugh G. 5 fluorine addition during the electrochemical fluorination. Bryce, Hudson, Wis., assignors to Minnesota Mining The electrochemical process is not limited to the pro & Manufacturing Company, St. Paul, Minn., a corpo" duction of monocarboxylate compounds. The hydrocar ration of Delaware bon polycarboxylic acids (and their anhydrides) can be fluorinated to produce the corresponding fluorocarbon acid No Drawing. Application February 1, 1952, fluorides, the hydrogen atoms and the hydroxyl groups Serial No. 269,584 of the starting acid being replaced by fluorine atoms. The fluorocarbon acid fluorides can be generically represented 3 Claims. (Cl. 204-59) by the formula: This invention relates to our discovery of a new and Rf (COF)m useful process of making saturated fluorocarbon acid fluo where n is an integer having a value of 1 for monocar rides, which are converted to derivatives thereof and re boxylic acid fluorides, a value of 2 for dicarboxylic acid covered as such. It is an improvement upon the electro fluorides, etc. chemical procedures described in the U.S. patents of J. H. The process as heretofore described and used, outlined Simons, No. 2,519,983 (August 22, 1950), and A. R. above, has the economic disadvantage of producing rela Diesslin, E.
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