| 摘要 |
<p>The present invention relates to a process for the preparation of a perfluoroacyl fluorides wherein the acyl radical is a propionyl or butyryl group. The process is characterized in that a perfluoroalkylvinylether wherein the alkyl radical is a methyl or ethyl group is thermally treated in the presence of a catalyst selected from: A) a fluoride of Li, Na, K, Cs or Rb, or a compound of Li, Na, K, Cs or Rb, which is easily fluorinated under the reaction conditions; B) a fluoride of Be, Mg, Ca, Sr, or Ba, or a compound of Be, Mg, Ca, Sr, or Ba, which is easily fluorinated under the reaction conditions; C) a fluoroaluminate, fluorosilicate, fluorotitanate or fluorometallate of an alkali metal, or of a metal belonging to group IIA of the Periodic Table or a compound, which is easily fluorinated to yield one of the above-said fluoroaluminates, fluorosilicates, fluorotitanates or fluorometallates under the reaction conditions; D) a fluoride of a metal of the first transition series, or the corresponding metal, or a compound of such a metal, which is easily fluorinated under the reaction conditions; E) a fluoride of a lanthanide or the corresponding metal or a compound of such a metal, which is easily fluorinated under the reaction conditions;& <LIT>F) an oxyfluoride of Si, Al, Ti, Ge, Sn or Pb, or a compound of Si, Al, Ti, Ge, Sn or Pb, which is easily fluorinated to yield one of the above-said oxyfluorides under the reaction conditions. </p> |
