Versalis S.p.a.

Enichem Anic S.p.a.

Enichem S.p.a

Polimeri Europa S.p.a.

Ecp Enichem Polimeri S.r.l.

Enimont Anic S.r.l.

Angelo Moalli

Francesco Masi

Guido Pampaloni

Fausto Calderazzo

Renzo Invernizzi

Lucia Rocchi

Anna Sommazzi

Giovanni Ricci

Giuseppe Leone

Filippo Renili

Fabio Marchetti

Massimo Guelfi

Anna Maria Raspolli Galletti

Giampietro Borsotti

Roberto Santi

Andrea Vallieri

Mario Polesello

Maria C Cassani

Vincenzo Passarelli

Passarella Vincenzo

An oxo-nitrogenated iron complex having general formula (I) or (II) wherein: Rand Ridentical or different, represent a hydrogen atom; or are selected from linear or branched, optionally halogenated C-C, preferably C-C, alkyl groups, optionally substituted cycloalkyl groups, optionally substituted aryl groups; R, identical or different, represent a hydrogen atom; or are selected from linear or branched, optionally halogenated C-C, preferably C-C, alkyl groups, optionally substituted cycloalkyl groups, optionally substituted aryl groups; Xand X, identical or different, represent a halogen atom such as, for example, chlorine, bromine, iodine; or are selected from linear or branched C-C, preferably C-C, alkyl groups, —OCORgroups or —ORgroups wherein Ris selected from linear or branched C-C, preferably C-C, alkyl groups. Said oxo-nitrogenated iron complex having general formula (I) or (II) can be advantageously used in a catalytic system for the (co)polymerization of conjugated dienes.

Oxo-nitrogenated iron complex, catalytic system comprising said oxo-nitrogenated iron complex and process for the (co)polymerization of conjugated dienes

Process for the preparation of polyisoprene with a mainly alternating cis-1,4-alt-3,4 structure comprising polymerizing isoprene in the presence of a catalytic system comprising: (a) at least one pyridyl iron complex having general formula (I): wherein: Ris selected from linear or branched C-C, preferably C-C, alkyl groups, optionally substituted cycloalkyl groups, optionally substituted aryl groups; Ris selected from linear or branched C-C, preferably C-C, alkyl groups; X, mutually identical or different, represent a halogen atom such as, for example, chlorine, bromine, iodine; or they are selected from linear or branched C-C, preferably C-C, alkyl groups, &#x2014;OCORgroups or &#x2014;ORgroups wherein Ris selected from linear or branched C-C, preferably C-C, alkyl groups. n is 2 or 3; (b) at least one co-catalyst selected from organo-derivative compounds of aluminum, preferably from (b) aluminoxanes having general formula (II):(R)&#x2014;Al&#x2014;O&#x2014;[&#x2014;Al(R)&#x2014;O&#x2014;]&#x2014;Al&#x2014;(R)&#x2003;&#x2003;(II) wherein R, Rand R, mutually identical or different, represent a hydrogen atom, or a halogen atom such as, for example, chlorine, bromine, iodine, fluorine; or they are selected from linear or branched C-Calkyl groups, cycloalkyl groups, aryl groups, said groups being optionally substituted with one or more silicon or germanium atoms; and m is an integer ranging from 0 to 1000; (b) aluminum compounds having general formula (III):Al(R)(R)(R)&#x2003;&#x2003;(III) wherein Ris a hydrogen atom, or is selected from linear or branched C-Calkyl groups, cycloalkyl groups, aryl groups, alkylaryl groups, arylalkyl groups, alkoxy groups; Rand R, mutually identical or different, are selected from linear or branched C-Calkyl groups, cycloalkyl groups, aryl groups, alkylaryl groups, arylalkyl groups; wherein the molar ratio between the aluminum present in the co-catalyst and the iron present in the iron pyridyl complex having general formula (I) is ranging from 5 to 60, preferably from 8 to 55.

Process for the preparation of polyisoprene with a mainly alternating cis-1,4- alt-3,4 structure in the presence of a catalytic system comprising a pyridyl iron complex

Oxo-nitrogenated iron complex having general formula (I): in which: Rand R, identical or different, represent a hydrogen atom; or they are selected from linear or branched, optionally halogenated C-C, preferably C-C, alkyl groups, optionally substituted cycloalkyl groups, optionally substituted aryl groups; Rrepresents a hydrogen atom, or it is selected from linear or branched, optionally halogenated C-C, preferably C-Calkyl groups, optionally substituted cycloalkyl groups, optionally substituted aryl groups; X, identical or different, represent a halogen atom such as, for example, chlorine, bromine, iodine, preferably chlorine; or they are selected from. linear or branched C-C, preferably C-C, alkyl groups, &#x2014;OCORgroups or &#x2014;ORgroups in which Ris selected from linear or branched C-C, preferably C-C, alkyl groups; n is 2 or 3. Said oxo-nitrogenated iron complex having general formula (I) can be advantageously used in a catalytic system for the (co)polymerization of conjugated dienes. 

Bis-imine titanium complex having general formula (I): wherein: Rand R, mutually identical or different, represent a hydrogen atom; or are selected from linear or branched, optionally halogenated, C-Calkyl groups, preferably C-C, optionally substituted cycloalkyl groups; Rand R, mutually identical or different, represent a hydrogen atom; or are selected from linear or branched, optionally halogenated, C-Calkyl groups, preferably C-C, optionally substituted cycloalkyl groups, optionally substituted aryl groups; X, X, Xand X, mutually identical or different, represent a halogen atom such as chlorine, bromine, iodine; or are selected from linear or branched C-Calkyl groups, preferably C-C, &#x2014;OCORgroups or &#x2014;ORgroups wherein Ris selected from linear or branched C-Calkyl groups, preferably C-C; or represent an acetylacetonate group (acac); provided that when Rand Rrepresent a methyl group and X, X, Xand Xrepresent a chlorine atom, Rand Rare different from 2,6-di-isopropylphenyl. 

Bis-imine titanium complex, catalytic system comprising said bis-imine titanium complex and process for the (co)polymertzation of conjugated dienes

Process for the preparation of syndiotactic 1,2-polybutadiene comprising polymerising 1,3-butadiene in the presence of a catalytic system comprising: &#x2014;at least one pyridyl iron complex having the general formula (I), in which: &#x2014;Rrepresents a hydrogen atom; or a methyl group; &#x2014;Rrepresents a hydrogen atom; or is selected from linear or branched C-Calkyl groups; &#x2014;X, identical or different to one another, represent a halogen atom; or are selected from linear or branched, C-Calkyl groups, &#x2014;OCORgroups or &#x2014;ORgroups in which Ris selected from linear or branched C-Calkyl groups; &#x2014;n is 2 or 3; &#x2014;at least one aluminoxane having the general formula (II), (R)-AI-O-[-AI(R)&#x2014;O-]-AI-(R)(ll) in which R, Rand R, identical or different to one another, represent a hydrogen atom, or a halogen atom; or are selected from linear or branched C-Calkyl groups, cycloalkyi groups, aryl groups, said groups being optionally substituted with one or more silicon atoms or germanium; and m is an integer ranging from 0 to 1000; in which the molar ratio between the aluminium present in the aluminoxane having the general formula (II) and the iron present in the pyridyl iron complex having the general formula (I) is ranging from 5 to 20. 

Process for the preparation of syndiotactic 1,2-polybutadiene in the presence of a catalytic system comprising a pyridyl iron complex

A process for preparing conjugated diene (co)polymers comprising polymerizing at least one conjugated diene in the presence of a catalytic system comprising: (a) at least one pyridyl iron (III) complex having general formula (I) or (II): wherein: &#x2014;R, R, Rand R, identical or different, represent a hydrogen atom; or are selected from linear or branched, optionally halogenated C-C, preferably C-C, alkyl groups, optionally substituted cycloalkyl groups, optionally substituted aryl groups; &#x2014;Rrepresents a hydrogen atom, or is selected from linear or branched, optionally halogenated C-C, preferably C-C, alkyl groups, optionally substituted cycloalkyl groups, optionally substituted aryl groups; &#x2014;X, identical or different, represent a halogen atom such as, for example, chlorine, bromine, iodine; or are selected from linear or branched C-C, preferably C-C, alkyl groups, &#x2014;OCORgroups or &#x2014;ORgroups wherein Ris selected from linear or branched C-C, preferably C-C, alkyl groups. &#x2014;n is 3; (b) at least one co-catalyst selected from organo-aluminum derivatives, preferably from: (b) aluminum compounds having general formula (III): Al(R)(R)(R) (IIl) wherein Rrepresents a hydrogen atom, or is selected from linear or branched C-Calkyl groups, cycloalkyl groups, aryl groups, alkylaryl groups, arylalkyl groups, alkoxy groups; Rand R, identical or different, are selected from linear or branched C-Calkyl groups, cycloalkyl groups, aryl groups, alkylaryl groups, arylalkyl groups; (b) aluminoxanes having general formula (IV): (R)&#x2014;Al&#x2014;O&#x2014;[-AI(R)&#x2014;O-]-AI-(R)(IV), wherein R, Rand R, identical or different, represent a hydrogen atom, or a halogen atom such as chlorine, bromine, iodine, fluorine; or are selected from linear or branched C-Calkyl groups, cycloalkyl groups, aryl groups, said groups being optionally substituted with one or more silicon or germanium atoms; and m is an integer ranging from 0 to 1000; (b) partially hydrolyzed organo-aluminum derivatives; (b) haloaluminum alkyls having general formula (V) or (VI): AI(R)(X')(V) AI(R)(X&#x2032;)(VI) wherein p is 1 or 2; q is an integer ranging from 1 to 5; R, identical or different, are selected from linear or branched C-Calkyl groups; X&#x2032; represents a chlorine or bromine atom, preferably chlorine; provided that said co-catalyst (b) is not selected from organo-boron derivatives. 

Process for preparing conjugated diene (co)polymers in the presence of a catalytic system comprising a pyridyl iron (III) complex

Disclosed are nitrogen titanium complexes having general formula (I) or (II). Catalytic systems that include the nitrogen titanium complexes and that can be used for the (co)polymerization of conjugated dienes are disclosed. Processes for (co)polymerization of conjugated dienes using the catalytic systems are also disclosed.

Nitrogen titanium complex, catalytic system comprising said nitrogen titanium complex and process for the (co)polymerization of conjugated dienes

An oxo-nitrogenated vanadium complex having the general formula (I): in which: &#x2014;R, R, R, R, R, Rand R, mutually identical or different, represent a hydrogen atom; or are selected from optionally halogenated, linear or branched C-C, preferably C-C, alkyl groups, optionally substituted cycloalkyl groups, optionally substituted aryl groups; &#x2014;Xand X, mutually identical or different, represent a halogen atom such as, for example, chlorine, bromine, iodine, preferably chlorine; or are selected from linear or branched C-C, preferably C-C, alkyl groups, &#x2014;OCORgroups or &#x2014;ORgroups in which Ris selected from linear or branched C-C, preferably C-C, alkyl groups; &#x2014;Y is selected from ethers such as, for example, diethyl ether, tetrahydrofuran (THF), dimethoxyethane, preferably is tetrahydrofuran (THF); &#x2014;n is 0 or 1. Said oxo-nitrogenated vanadium complex having the general formula (I) may advantageously be used in a catalytic system for (co)polymerizing conjugated dienes.

Oxo-nitrogenated vanadium complex, catalytic system comprising said oxo-nitrogenated vanadium complex and process for (co)polymerising conjugated dienes

Pyridine complex of zirconium having general formula (I): Said pyridine complex of zirconium having general formula (I) may advantageously be used in a catalytic system for the (co)polymerization of conjugated dienes. 

Pyridine complex of zirconium, catalytic system comprising said pyridine complex of zirconium and process of (co)polymerization of conjugated dienes

A solid catalyst component for the (co)polymerization of &#x3b1;-olefins having general formula (I):ZrMAlClMg&#x2003;&#x2003;(I)wherein: Said solid catalyst component can be advantageously used as a solid component in a catalyst for the (co)polymerization of &#x3b1;-olefins. Said catalyst can be advantageously used in a process for the (co)polymerization of &#x3b1;-olefins.

Solid catalyst component, catalyst comprising said solid component, and process for the (co)polymerization of &#x3b1;-olefins

A solid catalyst component for the (co)polymerization of &#x3b1;-olefins having general formula (I): ZrMAlClMg(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 &#x3b1;-olefins. Said catalyst can be advantageously used in a process for the (co)polymerization of &#x3b1;-olefins.

Solid catalyst component, catalyst comprising said solid component, and process for the (CO)polymerization of &#x3b1;-olefins

Metal alkyl-arene having general formula (I) or (Ia): M (&#x3b7;-arene)AlXR(I) M (&#x3b7;-arene)AlXR(Ia) wherein: &#x2014;M represents zirconium (Zr), hafnium (Hf), or mixtures thereof, preferably zirconium; &#x2014;arene represents a benzene, or a benzene 10 substituted with from 1 to 6 linear or branched C-Calkyl groups, or mixtures thereof; &#x2014;X represents a halogen atom selected from chlorine, bromine, fluorine, iodine, preferably chlorine; &#x2014;R represents a linear or branched C-Calkyl group; &#x2014;q is a number ranging from 2 to 6, preferably 3 for a metal alkyl-arene having general formula (I), 2 for a metal alkyl-arene having general formula (Ia); &#x2014;r is a number ranging from 1 to 20, preferably 9 for a metal alkyl-arene having general formula (I), 6 for a metal alkyl-arene having general formula (Ia); &#x2014;s is a number ranging from 1 to 6, preferably 2. Said metal alkyl-arene can be advantageously used for the preparation of solid components of catalysts for the (co)polymerization of &#x3b1;-olefins.

Metal alkyl-arenes and processes for the preparation thereof

An organometallic composition which can be used as activating component in a metallocene catalyst for the (co)polymerization of &#x3b1;-olefins, comprises: (A) a fluorinated di-unsaturated cyclic compound, having a relatively acid hydrogen atom, (B) an organometallic compound sufficiently basic to react with the acid hydrogen of the above compound (A), and (C) a polar aprotic organic compound, not containing metallic atoms, having a dielectric constant, in the pure state, equal to or greater than 2, and a weak coordinating capacity. Said composition allows a metallocene catalytic system of the ionic type to be obtained, with a high activity in the (co)polymerization of olefins and a reduced content of metallic residue in the polymeric product thus obtained.

Activating organometallic composition for the (co) polymerization of alpha-olefins comprising fluorinated cyclopentadienyl compounds

A catalyst for the (co)polymerization of ethylene is obtained by a process comprising the contact of the following components (A), (B), (C) and (D) in the respective molar ratios (1):(0.5-2):(0-25):(0-15): (A): a bivalent arene of titanium having the formula

Catalyst for the homopolymerization or copolymerization of ethylene and

A procedure is described for the preparation of a vanadium bis-arene, [V(arene).sub.2 ], starting from vanadium oxychloride, aluminium metal, aluminium trichloride and an arene, wherein:

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Pontedera, Italy

Guido Pampaloni