Patent ES-8601245-A1 (ES)
Title: Catalyst components and catalysts for the polymerization of olefins.
IPC: C08F4/64
Filed: 1983-09-08
Abstract: Catalyst (I) for copolymerising alpha-olefins of formula CH2:CH-R (II) (R is 1-4C alkyl) or their mixt. with minor amts. of ethylene comprises a solid (A) contg. a Ti halide (III) and an electron donor (IV) not contg. active H's supported on an anhydrous Mg halide (V) having crystallites of average size less than 300 angstroms. The (IV) and (III) are in ratio 0.2-3 (0.5-2) and the ratio of (IV) and (V) is 0.05-0.3. The solid (A) is obtained by a non-extractive method carried out with a substance (C) on a compsn. (B) comprising (V) or (V) with (III) and/or (IV) until (i) the surface area of (B) is increased at least 3 times without reduction in crystallite size or, (ii) the average crystallite size of (V) is increased by at least 5% without reduction in the surface area of (B). - (C) is liquid under the treatment conditions, inert to the catalyst components, with a dielectric constant at 20 deg.C equal to or greater than 2. It is employed in amt. exceeding 10% wt. w.r.t. (V) (ratio 0.1-20) and is left fully or partially in contact with (A) after treatment or is removed by evapn. (III) and/or (IV) is/are supported on (V) during or after treatment with (C). - (I) can be prepd. without expensive and difficult extractive and/or washing methods but is still suitable for stereoregular polymerisation of alpha-olefins. ((Dwg.0/0)) EPAB- EP-106141 B Components of catalysts for polymerising alpha-olefins CH2=CHR, in which R is a C1-C4 alkyl radical or an aryl radical, and mixtures thereof with minor amounts of ethylene, said components comprising a solid (a) containing a titanium halide and an electron-donor compound (ED) not containing active hydrogen atoms supported on an anhydrous magnesium dihalide the crystallites of which have an average size less than 300 Angstroms, the ED compound/titanium halide in solid (a) molar ratio being from 0.2 to 3 and the ED compound/magnesium dihalide molar ratio being from 0.05 to 0.3 solid (a) or a composition containing solid (a) being obtained through a non-extractive method carried out with a substance (c) on a composition (b) at temperatures from 60 to 150 deg. C, preferably at the boiling temperature of substance (c), composition (b) comprising an anhydrous magnesium dihalide the crystallites of which have an average size less than 300 Angstroms or comprising said magnesium dihalide containing, supported thereon, a titanium halide and/or an ED compound, until the surface area of (b) is increased by at least 3 times without a reduction in the average size of the magnesium dihalide crystallites, or until the average size of the crystallites of the magnesium dihalide present in (b) is increased by at least 5% without a reduction in the surface area of (b), substance (c) being liquid under the treatment conditions, inert to the compounds forming the catalyst components and having a dielectric constant at 20 deg. C equal to or higher than 2 and being employed in an amount exceeding 10% by weight in respect with the magnesium halide and being left, at the end of the treatment, fully or partially in contact with solid (a) or, if removed, being removed by evaporation the titanium halide and/or the ED compound being supported on the magnesium dihalide during or after the treatment with substance (c) at least when said compounds are not already supported on the magnesium diha - EP-106141 B Components of catalysts for polymerising alpha-olefins CH2 =CHR, in which R is a C1-C4 alkyl radical or an aryl radical, and mixtures thereof with minor amounts of ethylene, said components comprising a solid (a) containing a titanium halide and an electron-donor compound (ED) not containing active hydrogen atoms supported on an anhydrous magnesium dihalide the crystallites of which have an average size less than 300 Angstroms, the ED compound/titanium halide in solid (a) molar ratio being from 0.2 to 3 and the ED compound/magnesium dihalide molar ratio being from 0.05 to 0.3 solid (a) or a composition containing solid (a) being obtained through a non-extractive method carried out with a substance (c) on a composition (b) at temperatures from 60 to 150 deg. C, preferably at the boiling temperature of substance (c), composition (b) comprising an anhydrous magnesium dihalide the crystallites of which have an average size less than 300 Angstroms or comprising said magnesium dihalide containing, supported thereon, a titanium halide and/or an ED compound, until the surface area of (b) is increased by at least 3 times without a reduction in the average size of the magnesium dihalide crystallites, or until the average size of the crystallites of the magnesium dihalide present in (b) is increased by at least 5% without a reduction in the surface area of (b), substance (c) being liquid under the treatment conditions, inert to the compounds forming the catalyst components and having a dielectric constant at 20 deg. C equal to or higher than 2 and being employed in an amount exceeding 10% by weight in respect with the magnesium halide and being left, at the end of the treatment, fully or partially in contact with solid (a) or, if removed, being removed by evaporation the titanium halide and/or the ED compound being supported on the magnesium dihalide during or after the treatment with substance (c) at least when said compounds are not already supported on the magnesium diha USAB- US4529716 A Components for catalysts (I) comprise a solid (a) contg. a Ti halide and an electron-donor cpd. (ED) not contg. active H atoms supported on an anhydrous Mg dihalide the crystallites of which have an average size below 300 Angstroms, the ED cpd./Ti halide in solid (a) molar ratio being from 0.2 to 3 and the ED cpd./Mg dihalide molar ratio being from 0.05 to 0.3 solid (a) or a compsn. contg. solid (a) being obtd. by a treatment with a cpd. (c) at temp. above 40 deg.C and below 350 deg.C for 0.5-10 hours or longer, on a compsn. (b) comprising an anhydrous Mg dihalide the crystallites of which have an average size below 300 Angstroms or comprising the Mg dihalide contg., supported on it, a Ti halide and/or an ED cpd. until the surface area of (b) is increased by at least three times without a redn. in the average size of the Mg dihalide crystallites, or until the average size of the crystallites of the Mg dihalide present in (b) is increased by at least 5% without a redn. in the surface area of (b). Cpd. (c) is liq. under treatment conditions, inert to the cpds. forming the catalyst components and has a dielectric constant at 20 deg.C equal to or higher than 2 and is used in amt. exceeding 10% by wt. relative to the Mg halide and is left, at the end of the treatment, fully or partially in contact with solid (a) or, if removed, is removed by evapn. The Ti halide and/or the ED cpd. is supported on the Mg dihalide during or after the treatment with cpd. (c) at least when the cpds. are not already supported on the Mg dihalide.