Carrier of catalyst and catalyst component composed of the carrier, for polymerization of olefins, as well as processes for production thereof
AssigneeMitsubishi Petrochemical Co., Ltd.
InventorsMitsuyuki Matsuura, Takashi Fujita
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Abstract
A carrier of catalysts for polymerization of olefins is disclosed, which is produced from a magnesium halide and which is characterized by its granulometric properties. Production of a catalyst component for polymerization of olefins which comprises the carrier is also disclosed.
Claims15
A carrier of a catalyst for polymerization of olefins which is a catalyst carrier of solid particles produced from a magnesium halide, characterized in that the carrier is composed of tertiary particles each constituted by a large number of fine secondary particles, each of said secondary particles is constituted by a large number of very fine primary particles included therein, and the carrier composed of said tertiary particles has:
- (a) a specific area in a range of 0.1 to 10 m.sup.2 /g,
- (b) a void volume formed by pores of not more than 10,000 A of not more than 0.5 ml/g,
- (c) a ratio of the average diameter of the tertiary particles to that of the secondary particles in a range of 50 to 200, and
- (d) a ratio of the specific surface area of the carrier to that of a sphere having a diameter corresponding to the particle diameter of the tertiary particles in a range of 1 to 10.
A process for producing a carrier of a catalyst for polymerization of olefins, which comprises preparing a homogeneous solution by contacting (a) a magnesium dihalide with (b) a titanic acid ester or a polytitanic acid ester, contacting the resulting homogeneous solution with (c) a polymeric silicone compound, and separating out a solid carrier component.
A process for producing a catalyst component for polymerization of olefins which comprises:
- the steps of contacting (a) a magnesium dihalide with (b) a titanic acid ester or a polytitanic acid ester to prepare a homogeneous solution thereof, and contacting (c) a polymeric silicone compound with the resulting homogeneous solution to separate out a carrier, and
- a step of contacting at least one component of three components (D), (E) and (F) with the resulting carrier,
- the component (D) being a liquid titanium compound which must contain a halogen in the case where this component is used alone or in combination with the component (F),
- the component (E) being a silicone halide compound, and
- the component (F) being a polymeric silicone compound having a structural unit represented by the formula ##STR5## wherein R.degree. is a hydrocarbon residue.
Dependencies are inferred from the claim text.