Patent ID: 6420302
Filing Date: 2002-07-16
Classification: B01J,C07C,C07D

Abstract:
Catalyst system, comprising a metal dioxide selected from the group consisting of titanium dioxide, and hafnium dioxide, and a cocatalyst of the general formula (IV) or (V)Mâ€²(s+)(O-isopropyl)sâ€ƒâ€ƒ(IV) R3SiXâ€ƒâ€ƒ(V) in whichMâ€² is Al, Ca, Na, K, Si or Mg, s is an integer from 1 to 4 and is the oxidation state of the metal, R is alkyl having 1 to 10 C atoms or aryl having 6 to 20 C atoms, X is F, Cl, Br, CN, or of the general formulae: (CH3)2ClSi(CH2)2SiCl(CH3)2 (CH3)2ClSi(CH2)3CN [(CH3)3Si]2O [(CH3)3Si]2NH or [(CH3)3Si]2.