摘要:
Ziegler Natta catalysts for production of polyolefins, particularly polyethylene and copolymers thereof. Catalysts having improved activities are produced in a multi-stage procedure in which a porous supporting material is impregnated with a precursor composition, and then this is further treated one or more times with subpore volumes of secondary solutions of precursor components. Claims to the process for producing the catalysts, and to a process for making polyolefins using the catalysts are also presented.
摘要:
A catalyst system of the Ziegler-Natta type suitable for producing ethylene copolymers having a reduced hexane extractable content comprising (a) an organoaluminum component and (b) a titanium trichloride component which has been prepared by reducing titanium tetrachloride with magnesium metal.
摘要:
Gas phase polymerization processes are disclosed which utilize unsupported soluble transition metal coordination catalysts. The catalysts are introduced into the reactor as a solution.
摘要:
A catalyst system of the Ziegler-Natta type suitable for producing ethylene copolymers having a reduced hexane extractable content comprising (a) an organoaluminum component and (b) a titanium trichloride component which has been prepared by reducing titanium tetrachloride with magnesium metal.