| http://www.w3.org/ns/prov#value | - U.S. Pat. No. 4,324,691 describes the preparation of a catalyst component by reacting a particulate support material, preferably first with an aluminum compound, then with an organomagnesium compound, a transition metal compound, and a pacifying agent such as hydrogen chloride, and optionally an organometallic compound, a halogenating agent or a Lewis base.
|
