E.i. Dupont De Nemours and Company

Zoe Schnepp

Mark Andrew Harmer

Christopher P Junk

Andrew Edward Feiring

Frank L Schadt, Iii

Frank Leonard Iii Schadt

A process for manufacture of hydrofluoroalkanesulfonic acid with at least one hydrogen bonded to the carbon atom adjacent to the carbon atom bonded to the sulfonic acid group comprising: contacting a fluoroolefin with sulfite in an aqueous solution adjusted to about pH 4 to pH 12; removing water from the solution to form a solid; directly treating the solid with oleum; and distilling the hydrofluoroalkanesulfonic acid therefrom. Also a process for manufacture of potassium hydrofluoroalkanesulfonate in high purity is described.

Manufacture of hydrofluoroalkanesulfonic acids

Hydrofluoroalkanesulfonates of the general formula R&#x2014;O&#x2014;CXH&#x2014;CX&#x2014;SOM, where R is selected from the group consisting of alkyl groups, functionalized alkyl groups, and alkenyl groups; X is selected from the group consisting of hydrogen and fluorine with the proviso that at least one X is fluorine; and M is a cation, are made by reacting fluorovinyl ether with aqueous sulfite solution. Organic onium hydrofluoroalkanesulfonates are useful as ionic liquids and photoacid generators.

Hydrofluoroalkanesulfonic acids and salts from fluorovinyl ethers

Hydrofluoroalkanesulfonic acids from fluorovinyl ethers

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Zoe Schnepp