摘要:
Spherical components of catalysts for the polymerization of olefins comprising:
(a) a vanadium compound selected from the compounds of formula VOX₂Y or VX n Y n-4n , where X is Cl or Br and Y is Cl, Br, OR or NR I ₂ (b) MgCl₂ in spherical form. Said components have an average diameter greater than 1 µm, a surface area of at least 10 m²/g, a porosity of at least 0.1 g/cm³ and an X-ray spectrum having particular characteristics.
摘要翻译:用于烯烃聚合的催化剂的球形组分包括:(a)选自式VOX2Y或VXnYn-4n的钒化合物,其中X为Cl或Br,Y为Cl,Br,OR或NR2( b)球形MgCl2。 所述组分具有大于1μm的平均直径,至少10m 2 / g的表面积,至少0.1g / cm 3的孔隙率和具有特定特征的X射线光谱。
摘要:
Disclosed is a catalyst for the polymerization of olefins, comprising the product of the reaction between an Al-alkyl compound and a solid catalyst component containing a magnesium halide in active form, a titanium compound and an electron-donor selected from the 1,3-diketones of formula:
wherein the radicals R are the same or different, the radicals R I are the same or different, and R and R I are C₁-C₂₀ alkyl, C₃-C₂₀ cycloalkyl, C₆-C₁₂ aryl, C₇-C₂₀ arylalkyl or alkylaryl radicals or hydrogen, with the proviso that at least one of the R radicals is not hydrogen and can be bonded with the other R radical to form a cyclic structure, and at least one of the R I radicals, which are not bonded to one another to form a cyclic structure, is a branched alkyl, cycloalkyl or aryl radical, or is bonded to one or both R radicals to form a cyclic structure.
摘要:
Disclosed are catalyst components for the polymerization of olefins comprising magnesium halide in active form, and, supported thereon, a titanium halide or titanium halogen alcoholate and an electron-donor compound selected from the diamines of formula
wherein the radicals R 1 to R 1 0 are the same or different and are hydrogen or C 1 -C 1 8 hydrocarbon radicals, with the proviso that at least one of the R 7 and R 8 radicals and at least one of the R 9 and R 10 radicals are not hydrogen. Also, disclosed are catalysts obtained from said catalyst components and an AI-alkyl compound, as well as catalysts obtained by reaction of an AI-alkyl compound and a diamine of formula (I) with a solid catalyst component comprising a titanium halide or a titanium halogen alcoholate, and an electron-donor compound having particular characteristics of extractability with AI-triethyl, supported on magnesium halide in active form.
摘要:
Catalyst components for the polymerization of olefins obtained by reacting a tetravalent titanium halide or halogen alcoholate and an electron-donor compound with a porous polymer support on which is supported a magnesium dihalide or a magnesium compound which does not contain Mg-C bonds and can be transformed into a dihalide, characterized in that the Mg content before and after the reaction with titanium compound ranges from 6 to 12% by weight.
摘要:
Diethers suitable for use in the preparation of Ziegler-Natta catalysts having the formula: where A, B, C, and D are carbon atoms or heteroatoms, v, x, and y are 0 or 1; u and z are either 0, 1, or 2; the radicals R and R I , equal or different, are H; halogens; linear or branched alkyl radicals; cycloalkyl, aryl, alkylaryl, and aralkyl radicals; the R II radicals, equal or different, are linear or branched alkyl radicals; cycloalkyl, aryl, alkylaryl, and aralkyl radicals; at least two R radicals can be bonded to one another to form saturated or unsaturated condensed cyclic structures, optionally substituted with R III radical selected from halogens; linear or branched alkyl radicals; cycloalkyl, aryl, alkylaryl, and aralkyl radicals; said radicals from R to R III optionally containing at least one heteroatom.
摘要:
Polyolefins stabilized against oxidation phenomena are obtained by using a process comprising the polymerization of monomers by way of a catalyst prepared by reacting an aluminum alkyl compound, and optionally an electron donor compound, with a solid component comprising a Ti compound and an electron-donor compound supported on magnesium chloride, the polymerization being carried out in the presence of one or more phenolic stabilizers and using, as electron-donor compound in the solid catalyst component, a compound selected from particular classes of ethers.
摘要:
Catalyst components for the polymerization of olefins obtained by reacting a tetravalent titanium halide or halogen alcoholate and an electron-donor compound with a porous polymer support on which is supported a magnesium dihalide or a magnesium compound which does not contain Mg-C bonds and can be transformed into a dihalide, characterized in that the Mg content before and after the reaction with titanium compound ranges from 6 to 12% by weight.
摘要:
Catalyst components for the polymerization of olefins comprising a titanium halide or alkoxyhalide and an electron-donor compound selected from ethers having two or more ether groups and containing at least one heteroatom selected from the group consisting of N, S, P, Si, non-ether O and halogen atoms or at least one double bond, or both at least one heteroatom and at least one double bond, supported on a magnesium halide in active form. Catalysts obtained from said catalyst components and an Al-alkyl compound.