| 摘要 |
<p>This invention relates to improved catalysts for gaseous phase fluoridation of aliphatic chlorinated and chlorofluorinated hydrocarbons by hydrofluoric acid. The catalysts comprise chromium salts or oxides complexed with aluminum phosphate and are characterized by a total specific surface area greater than about 200 m2/g, but less than about 1000 m2/g a surface area of pores of 40 to 50 ANGSTROM in radius above about 5 m2/g, but less than about 150 m2/g, a surface area of pores greater than or equal to 250 ANGSTROM in radius above about 2 m2/g. but less than about 60 m2/g. This invention also relates to gaseous phase fluoridation processes for chlorinated or chlorofluorinated derivatives utilizing these catalysts in fluidized bed reactors.</p> |
