| http://www.w3.org/ns/prov#value | - st one element selected from among those belonging to the groups II, III and IV of the Periodic Table, and is preferably selected from porous oxides such as SiO2, Al2O3, MgO, ZrO2, TiO2, B2O3, CaO, ZnO, BaO, ThO2 or mixtures of porous oxides (page 4, lines 52 to 56).2.9 The organoaluminum compounds [C-1] and [C-2] are compounds represented by the formula R**(5)nAlX3-n wherein R**(5) is hydrocarbon
|
