Abstract:
A gas phase polymerization process comprising: (1) preparing a solution of a catalyst precursor comprising a mixture of magnesium and titanium compounds, an electron donor and a solvent; (2) adding a filler to the solution from step (1) to form a slurry; (3) spray drying the slurry from step (2) at a temperature of 100 to 140 °C to form a spray dried precursor; (4) slurring the spray dried precursor from step (3) in mineral oil, (5) partially or fully pre-activating the catalyst precursor by contacting the slurry of (4) with one or more Lewis Acids, and (6) transferring the partially or fully activated precursor from step (5) into a gas phase reactor in which an olefin polymerization reaction is in progress.
Abstract:
A Ziegler-Natta procatalyst composition in the form of solid particles and comprising magnesium, halide and transition metal moieties, said particles having an average size (D50) of from 10 to 70 μm, characterized in that at least 5 percent of the particles have internal void volume substantially or fully enclosed by a monolithic surface layer (shell), said layer being characterized by an average shell thickness/particle size ratio (Thickness Ratio) determined by SEM techniques for particles having particle size greater than 30 μm of greater than 0.2.
Abstract:
Se describe una composicion de procatalizador de ZieglerNatta en forma de Particulas Solidas y que comprende fracciones de magnesio, haluro y metal de transicion, tales particulas tienen un tamano promedio (D50) de 10 a 70 mum, caracterizada por un indice de tamano de particula D95/D5 menor de o igual a 10.
Abstract:
Se describe una composicion de procatalizador de Ziegler-Natta en la forma de particulas solidas y que comprende magnesio, haluro y porciones de metales de transicion, tales particulas tienen un tamano promedio (D50) desde 10 hasta 70 ?m, caracterizada porque al menos 5 por ciento de las particulas tienen volumen hueco interno sustancial o completamente encerrado por una capa de superficie monolitica (coraza), caracterizandose la capa por una proporcion de espesor de coraza/tamano de particula promedio (Proporcion de espesor) determinada mediante tecnicas de SEM para particulas con un tamano de `particula mayor que 30 ?m de mas de 0.2.
Abstract:
A Ziegler-Natta procatalyst composition in the form of solid particles and comprising magnesium, halide and transition metal moieties, said particles having an average size (D50) of from 10 to 70 μm, characterized in that at least 5 percent of the particles have internal void volume substantially or fully enclosed by a monolithic surface layer (shell), said layer being characterized by an average shell thickness/particle size ratio (Thickness Ratio) determined by SEM techniques for particles having particle size greater than 30 μm of greater than 0.2.
Abstract:
A Ziegler-Natta procatalyst composition in the form of solid particles and comprising magnesium, halide and transition metal moieties, said particles having an average size (D50) of from 10 to 70 ~m, characterized in that at least 5 percent of the particles have internal void volume substantially or fully enclosed by a monolithic surface layer (shell), said layer being characterized by an average shell thickness/ particle size ratio (Thickness Ratio) determined by SEM techniques for particles having particle size greater than 30 ~m of greater than 0.2.
Abstract:
A Ziegler-Natta procatalyst composition in the form of solid particles and comprising magnesium, halide and transition metal moieties, said particles having an average size (D50) of from 10 to 70 μm, characterized in that at least 5 percent of the particles have internal void volume substantially or fully enclosed by a monolithic surface layer (shell), said layer being characterized by an average shell thickness/particle size ratio (Thickness Ratio) determined by SEM techniques for particles having particle size greater than 30 μm of greater than 0.2.