Method for producing fluorine-containing organic acid having 2 to 20 carbon atoms and composition containing fluorine-containing organic acid having 2 to 20 carbon atoms

摘要

Provided is a method for producing a fluorine-containing organic acid having 2 to 20 carbon atoms in which a fluorine-free organic compound is reduced. Separating the fluorine-containing organic acid phase having 2 to 20 carbon atoms from the concentrated sulfuric acid phase after contacting the mixture containing the fluorine-containing organic acid having 2 to 20 carbon atoms and the organic compound not containing fluorine with concentrated sulfuric acid, The contact is carried out so that the amount of water present in the concentrated sulfuric acid phase is 10% by mass or less, and the fluorine-containing organic acid having 2 to 20 carbon atoms is mixed with the fluorine-free organic compound. The manufacturing method of a C2-C20 fluorine-containing organic acid including obtaining in the form of the C2-C20 fluorine-containing organic acid phase reduced compared with the mixture.