PROCESS FOR PRODUCING SILICA CATALYZERS CONTAINING FLUOR AND THEIR USE FOR PRODUCING NITRILES

摘要

An improved fluorinated siliceous catalyst, well adapted for the catalytic synthesis of aromatic/aliphatic nitriles from their corresponding formamides, formanilides or amides, is comprised of a plurality of silica particulates, the specific surface of which ranging from about 200 to about 300 m2/g, having a total pore volume ranging from about 1 to about 1.5 cm3/g, with an average pore diameter ranging from about 100 to about 200 ANGSTROM , having an exchange pH of less than about 3, and with the fluorine content thereof bonded to the silica, expressed in F-, ranging from about 0.05 to about 2% by weight based upon the silica, and the sodium content thereof, expressed as Na2O, being less than about 1% by weight, also based upon the silica.