Solid catalyst component, catalyst comprising said solid component, and process for the (CO)polymerization of α-olefins

A solid catalyst component for the (co)polymerization of α-olefins having general formula (I): ZrnMAlxClMgp (I) wherein: M represents titanium (Ti), vanadium (V), or mixtures thereof; n is a number ranging from 0.01 to 2; x is a number ranging from 0.1 to 4; y is a number ranging from 5 to 53; p is a number ranging from 0 to 15; obtained by means of a process comprising putting at least one zirconium arene in contact with at least one metal compound and, optionally, with at least one compound of magnesium. Said solid catalyst component can be advantageously used as a solid component in a catalyst for the (co)polymerization of α-olefins. Said catalyst can be advantageously used in a process for the (co)polymerization of α-olefins

Preparation of alternating olefin-carbon monoxide copolymers by means of a heterogeneous supported catalyst

The copolymers are prepd. using a catalyst system of (a) Pd(O2CNEt2)2(NHEt2)2 (I) with a solid carrier; (b) a mono- or bidentate ligand contg. 1 or 2 N or P atoms and capable of bonding Pd through dative bonds; and (c) a mineral or org. acid. Thus, a 1:1 C2H4/CO mixt. was pressured to 56  105 Pa at 80 for 5 h in presence of I on SiO2 carrier, 1,3-bis(diphenylphosphino)propane, and F3CCO2H in MeOH to give copolymer

RUTHENIUM-BASED CATALYST AND USE THEREOF IN THE SELECTIVE HYDROGENATION OF AROMATIC OR POLYUNSATURATED COMPOUNDS

An object of the present invention relates to a catalyst suitable for the selective hydrogenation of aromatic or polyunsaturated compounds, comprising: - a zirconia carrier (ZrO2) - ruthenium - iron oxide (Fe2O3) - at least one promoter (A) selected from the oxides of metals of groups IB, IIB and IIIA - at least one promoter (B) containing V, Ti, Hf, Zr or a mixture thereof, obtained by hydrolysis of at least one precursor P-B selected from the following metal arenes: V DEG (arene)2 (I) V(arene)2 AlCl4 (II) M ([eta]6-arene) pAlqXr (III) M([eta]6-arene)p'Alq'Xr'Rs (IV) wherein : - V represents vanadium, - Al represents aluminium, - M represents zirconium (Zr), hafnium (Hf), titanium (Ti) or mixtures thereof, preferably titanium or zirconium; - arene represents a benzene, or a benzene substituted by from 1 to 6 linear or branched C1-C6 alkyl groups, or mixtures thereof; - X represents a halogen atom, selected from chlorine, bromine, fluorine, iodine, preferably chlorine; - R represents a linear or branched C1-C15 alkyl group; - p represents a number ranging from 1 to 2; - q is a number ranging from 2 to 6, preferably from 2 to 3; - r is a number ranging from 8 to 20, preferably from 8 to 11; - p represents a number ranging from 1 to 2; - q' is a number ranging from 2 to 6, preferably from 2 to 3; - r' is a number ranging from 2 to 20, preferably from 6 to 9; - s is a number ranging from 1 to 6, preferably 2. The catalyst of the invention is used in a process for the selective hydrogenation of aromatic or polyunsaturated compounds, particularly in the selective hydrogenation of benzene or cyclohexene

Solid catalyst component, catalyst comprising said solid component, and process for the (co)polymerization of alpha-olefins

A solid catalyst component for the (co)polymn. of α-olefins having general formula (I): ZrnMA1xC1Mgp (I) wherein : M represents titanium (Ti), vanadium (V), or mixts. thereof; n is a no. ranging from 0.01 to 2; x is a no. ranging from 0.1 to 4; y is a no. ranging from 5 to 53; p is a no. ranging from 0 to 15; obtained by means of a process comprising putting at least one zirconium arene in contact with at least one metal compd. and, optionally, with at least one compd. of magnesium. Said solid catalyst component can be advantageously used as a solid component in a catalyst for the (co)polymn. of α-olefins. Said catalyst can be advantageously used in a process for the (co)polymn. of α-olefins

Method for preparation of poly(a-olefin)s functionalized with (meth)acrylic groups

The polyolefins are copolymers of ethylene with alkyl (meth)acrylates, prepd. using a catalyst comprising Ni complexes with substituted salicylate ligands and an organoaluminum co-catalyst. The Ni complex is Ni(II)-bis(3,5-dinitro)-N-(2,6-isopropylphenyl)salicylaldiminato, and Ni(II)-bis(3,5-dinitro)-N-(phenyl)-salicylaldiminato and the cocatalysts are aluminoxanes. The polymn. is carried out in an inert solvent under 10-50 bar pressure at 120-260°

Solid catalyst component, catalyst comprising said solid component, and process for the (co)polymerization of alpha-olefins

A solid catalyst component for the (co) polymn. of α-olefins having general formula (I): ZrnMA1xC1Mgp (I) wherein : M represents titanium (Ti), vanadium (V), or mixts. thereof; n is a no. ranging from 0.01 to 2; x is a no. ranging from 0.1 to 4; y is a no. ranging from 5 to 53; p is a no. ranging from 0 to 15; obtained by means of a process comprising putting at least one zirconium arene in contact with at least one metal compd. and, optionally, with at least one com not pound of magnesium. Said solid catalyst component can be advantageously used as a solid component in a catalyst for the (co) polymn. of α-olefins. Said catalyst can be advantageously used in a process for the (co) polymn. of α-olefins

Synthesis and spectroscopic characterization of titanium pyridylanilido complexes as catalysts for the polymerization of 1,3-butadiene and isoprene

A series of titanium(IV) complexes of general formula TiCl3[N,N-(pyridin-2-ylalkyl)anilido, TiCl3L, 8–13, were prepared by reactions of TiCl4 with substituted (pyridin-2-ylalkyl)anilines, LH, and characterized by analytical and spectroscopic methods. Compound 10 was obtained by using TiI4 as titanium precursor. In the case of LH = 2,6-diisopropyl(pyridin-2-ylmethyl)aniline, 1, and 2,6-diisopropyl(pyridin-2-ylethyl)aniline, 2, the intermediate formation of TiCl4LH, 6–7, was detected, undergoing HCl elimination on heating to finally give 8 and 9. The products are not stable in coordinating solvents (thf, CH3CN). Ligand dissociation was observed from TiCl3(N,N-2,6-diisopropyl(pyridin-2-ylmethyl)anilido, 8, resulting in the formation of Ti2OCl6(CH3CN)4 and 2-(2,6-diisopropyl-phenylaminomethyl)pyridinium hexachlorotitanate. By reaction of TiCl3(thf)3 or TiI3 with 1 and 2 at ca 100 °C, the air sensitive derivatives TiCl2L, 14, and TiI2L, 15, were afforded. All titanium complexes were evaluated as catalysts for the polymerization of 1,3-butadiene and isoprene, in association with methylaluminoxane (MAO). The results indicate that the catalytic activity is strictly dependent on the nature of the ligands and the oxidation state of the metal, while the nature of the titanium complex has negligible influence on the selectivity

Solid catalyst component, catalyst comprising said solid component, and process for the (co)polymerization of alpha-olefins

A solid catalyst component for the (co) polymn. of α-olefins having general formula (I): ZrnMA1xC1Mgp (I) wherein : M represents titanium (Ti), vanadium (V), or mixts. thereof; n is a no. ranging from 0.01 to 2; x is a no. ranging from 0.1 to 4; y is a no. ranging from 5 to 53; p is a no. ranging from 0 to 15; obtained by means of a process comprising putting at least one zirconium arene in contact with at least one metal compd. and, optionally, with at least one com not pound of magnesium. Said solid catalyst component can be advantageously used as a solid component in a catalyst for the (co) polymn. of α-olefins. Said catalyst can be advantageously used in a process for the (co) polymn. of α-olefins