| abstract |
SUMMARY The present invention relates to a solid acidic catalyst comprising a porous, highly fluorinated acidic polymer and a method of making the same. The catalyst comprises at least 90% by weight of a highly fluorinated acidic polymer and has a surface area from about 0.01 m 2 / g to about 5 m 2 / g. The catalyst, subjecting the polymer to the pressurized fluid, such as SO 2 or CO 2, the polymer was heated above the softening point, the polymer was rapidly depressurized to inflate into the porous structure, and cooling the polymer It is prepared by Examples of highly fluorinated acidic polymers are perfluorinated sulfonic acid resins, perfluorinated and sulfonyl fluoride polymers. |