Patents by Inventor Fausto Calderazzo
Fausto Calderazzo has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7081505Abstract: An organometallic composition which can be used as activating component in a metallocene catalyst for the (co)polymerization of ?-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.Type: GrantFiled: July 10, 2002Date of Patent: July 25, 2006Assignee: Polimeri Europa S.p.A.Inventors: Anna Sommazzi, Francesco Masi, Giampietro Borsotti, Roberto Santi, Fausto Calderazzo, Guido Pampaloni, Vincenzo Passarelli
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Publication number: 20040198934Abstract: An organometallic composition which can be used as activating component in a metallocene catalyst for the (co)polymerization of &agr;-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.Type: ApplicationFiled: May 7, 2004Publication date: October 7, 2004Inventors: Anna Sommazzi, Francesco Masi, Giampietro Borsotti, Roberto Santi, Fausto Calderazzo, Guido Pampaloni, Vincenzo Passarelli
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Patent number: 5821189Abstract: 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 formulaTi (.eta..sup.6 -arene)(AlR.sub.x X.sub.4-x).sub.2 ;wherein: "arene" indicates benzene, or benzene substituted with from 1 to 6 C.sub.1 -C.sub.10 alkyl groups;each X independently represents a chlorine, bromine or fluorine atom;R is a C.sub.1 C.sub.10 alkyl group, linear or branched; "x" is a number varying from 0.5 to 2.Type: GrantFiled: May 19, 1995Date of Patent: October 13, 1998Assignee: Enichem S.p.A.Inventors: Fausto Calderazzo, Guido Pampaloni, Francesco Masi, Andrea Vallieri
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Patent number: 5808013Abstract: Process for the preparation of N-alkyl substituted metal carbamate solutions characterized in that a water solution of the salt of the metal of which the corresponding carbamate is to be obtained, is reacted with an organic solution, basically consisting of an aprotic solvent and a secondary amine, saturated with carbon dioxide.The above solutions can be used as catalysts in polymerization reactions of unsaturated monomers or for supporting metals on inorganic oxides.Type: GrantFiled: July 10, 1996Date of Patent: September 15, 1998Assignee: Enichem S.p.A.Inventors: Paolo Biagini, Gabriele Lugli, Fausto Calderazzo, Daniela Belli Dell'Amico, Alessandra Merigo
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Patent number: 5698731Abstract: A process is described for the preparation of aromatic carbamates in which an organic carbonate in a stoichiometric quantity or in a quantity higher than the stoichiometric value is reacted with an aromatic amine operating in the presence of a carbamation catalyst, wherein this catalyst is selected from N,N-substituted carbamate complexes of zinc or copper.The process gives high yields and selectivity in the useful reaction product.Type: GrantFiled: June 27, 1996Date of Patent: December 16, 1997Assignee: Ministero dell `Universita` e della Ricerca Scientifica e TecnologicaInventors: Aldo Bosetti, Pietro Cesti, Fausto Calderazzo
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Patent number: 5408030Abstract: A catalyst active in the preparation of alternating olefin/carbon monoxide (CO) copolymers is constituted by:(a) Pd(O.sub.2 CNEt.sub.2).sub.2 (NHET.sub.2).sub.2 supported on a solid carrier preferably constituted by hydroxylated silica,(b) an either mono- or bidentate ligand containing one or two nitrogen or phosphorous atoms capable of linking to Pd atom by dative bonds,(c) a mineral or organic acid.Disclosed are the preparation of the catalyst and the use of said catalyst in alternated copolymerization of ethylene (C2) and/or other olefins with carbon monoxide (CO).Type: GrantFiled: February 18, 1994Date of Patent: April 18, 1995Assignee: Enichem S.p.A.Inventors: Anna Sommazzi, Gabriele Lugli, Fabio Garbassi, Fausto Calderazzo, Daniela Belli Dell'Amico
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Patent number: 5369073Abstract: A catalyst active in the preparation of alternating olefin/carbon monoxide (CO) copolymers is constituted by:(a) at least one salt of a metal of Group IB of the Periodic System,(b) an either mono- or bidentate ligand containing one or two nitrogen or phosphorus atoms capable of linking to the copper, silver or gold atom by means of dative bonds,(c) a mineral or organic acid.Disclosed are the preparation of the catalyst and the use of said catalyst in alternated copolymerization of ethylene (C2) and/or other olefins with carbon monoxide.Type: GrantFiled: March 11, 1993Date of Patent: November 29, 1994Assignee: Enichem S.p.A.Inventors: Anna Sommazzi, Gabriele Lugli, Fabio Garbassi, Fausto Calderazzo
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Patent number: 5346873Abstract: A catalyst active in the preparation of alternating olefin/carbon monoxide (CO) copolymers is constituted by:(a) at least one salt of a metal of Group IB of the Periodic System,(b) a mono or bidentate ligand base containing one or two nitrogen or phosphorus atoms capable of linking to the metal atom by means of dative bonds,(c) a mineral or organic oxidizer agent.Also disclosed are the preparation of the catalyst and the use of said catalyst in alternated copolymerization of ethylene (C2) and/or other olefins with carbon monoxide (CO).Type: GrantFiled: March 11, 1993Date of Patent: September 13, 1994Assignee: Enichem S.p.A.Inventors: Anna Sommazzi, Gabriele Lugli, Fabio Garbassi, Fausto Calderazzo
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Patent number: 5324701Abstract: A catalyst active in the preparation of alternating olefin/carbon monoxide (CO) copolymers is constituted by:(a) Pd(O.sub.2 CNEt.sub.2).sub.2 (NHEt.sub.2).sub.2 supported on a solid carrier preferably constituted by hydroxylated silica,(b) an either mono- or bidentate ligand containing one or two nitrogen or phosphorous atoms capable of linking to Pd atom by dative bonds,(c) NOBF.sub.4.Disclosed are the preparation of the catalyst and the use of said catalyst in alternated copolymerization of ethylene (C2) and/or other olefins with carbon monoxide (CO).Type: GrantFiled: March 4, 1993Date of Patent: June 28, 1994Assignee: Enichem S.P.A.Inventors: Anna Sommazzi, Gabriele Lugli, Fabio Garbassi, Fausto Calderazzo, Daniela Belli Dell'Amico
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Patent number: 5314856Abstract: A catalyst active in the preparation of alternating olefin/carbon monoxide (CO) copolymers is constituted by:(a) Pd(O.sub.2 CNEt.sub.2).sub.2 (NHET.sub.2).sub.2 supported on a solid carrier preferably constituted by hydroxylated silica,(b) an either mono- or bidentate ligand containing one or two nitrogen or phosphorous atoms capable of linking to Pd atom by dative bonds,(c) a mineral or organic acid.Disclosed are the preparation of the catalyst and the use of said catalyst in alternated copolymerization of ethylene (C2) and/or other olefins with carbon monoxide (CO).Type: GrantFiled: March 4, 1993Date of Patent: May 24, 1994Assignee: Enichem S.p.A.Inventors: Anna Sommazzi, Gabriele Lugli, Fabio Garbassi, Fausto Calderazzo, Daniela B. Dell'Amico
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Patent number: 5210244Abstract: 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:(a) vanadium oxychloride (VOCl.sub.3), active aluminium metal, and aluminium trichloride are put in contact with each other, in a liquid arene, to transform the vanadium oxychloride into the complex compound [V(arene).sub.2 ].sup.+ [AlCl.sub.4 ].sup.- ;(b) a liquid cyclic or acyclic or acyclic ether is added to the reaction product of step (a) to reduce [V(arene).sub.2 ].sup.+ to [V(arene).sub.2 ]; and(c) the vanadium bis-arene [V(arene).sub.2 ] is recovered from the reacton product of step (b).The vanadium bis-arenes thus obtained are use in the preparation of catalysts for the polymerization of olefins.Type: GrantFiled: July 9, 1992Date of Patent: May 11, 1993Assignee: ECP Enichem Polimeri S.r.l.Inventors: Fausto Calderazzo, Guido Pampaloni, Francesco Masi, Angelo Moalli, Maria C. Cassani, Renzo Invernizzi
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Patent number: 5198565Abstract: Silicon and aluminum N,N-dialkylcarbamates are prepared by reacting a secondary amine and CO.sub.2 with respectively a silicon and an aluminum halide in a reaction medium consisting of an organic solvent and then hydrolyzed by treatment with water in an anhydrous organic solvent.Type: GrantFiled: September 27, 1991Date of Patent: March 30, 1993Assignee: Consiglio Nazionale delle RicercheInventors: Daniela Belli Dell'Amico, Fausto Calderazzo, Michela Dell'Innocenti, Pierluigi Robino
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Patent number: 5093508Abstract: Vanadium-arenes[V(arene).sub.2 ]wherein "arene" means benzene or mono-, di- or poly-(C.sub.1 -C.sub.5)-alkyl-substituted benzene, are prepared by means of a process which comprises:(a) forming a complex:[V(arene).sub.2 ](+).AlCl.sub.4 (-)by reacting vanadium trichloride, aluminum metal and aluminum trichloride with one another, by operating in the presence of the selected arene;(b) treating the so obtained complex with an either cyclic or acyclic, liquid aliphatic ether to obtain the reduction of [V(arene).sub.2 ](+) to [V(arene).sub.2 ]; and(c) recovering the so separated vanadium-arene.The vanadium-arenes are useful in the preparation of catalysts for olefin polymerization.Type: GrantFiled: January 4, 1991Date of Patent: March 3, 1992Assignee: Enimont Anic S.r.l.Inventors: Fausto Calderazzo, Guido Pampaloni, Lucia Rocchi, Angelo Moalli, Francesco Masi, Renzo Invernizzi
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Patent number: 5075260Abstract: Silicon and aluminium N,N-dialkylcarbamates are prepared by reacting a secondary amine and CO.sub.2 with respectively a silicon and an aluminium halide in a reaction medium consisting of an organic solvent. The respective hydrolysis products are obtained from said N,N-dialkylcarbamates by treatment with water in tetrahydrofuran.Type: GrantFiled: March 29, 1990Date of Patent: December 24, 1991Assignee: Consiglio Nazionale Delle RicercheInventors: Daniela Belli Dell'Amico, Fausto Calderazzo, Michela Dell'Innocenti
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Patent number: 5003094Abstract: Transition metal complex sulfides containing the NH.sub.2 R.sub.2.sup.+ group are prepared by treating the hydrogen sulfide an organic solution of a carbomate having the general formula:Me.sup.z (O.sub.2 CNR.sub.2).sub.zin which Me is a transition metal and R an alkyl group.Type: GrantFiled: August 10, 1989Date of Patent: March 26, 1991Assignee: Consiglio Nazionale Delle RicercheInventors: Fausto Calderazzo, Daniela Belli Dell'Amico
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Patent number: 4987111Abstract: A solid catalyst component for the polymerization of ethylene and the copolymerization of ethylene with C.sub.3 -C.sub.10 alpha-olefins, contains titanium, vanadium and chlorine, is substantially definable by the formula (in atomic proportions):V (1), Ti (n), Cl (4n)where n varies from 1 to 3, and is prepared by reacting titanium tetrachloride with a vanadium arene [V.degree.(arene).sub.2 ] (arene=benzene or mono-, di- or tri-alkyl substituted benzene) in accordance with the equation:V.degree.(arene).sub.2 +nTiCl.sub.4 .fwdarw.VTi.sub.n Cl.sub.4n +2 arenepossibly followed by treatment with an alkyl aluminum chloride. This catalyst component, when associated with a trialkyl aluminium, is highly active in the production of ethylene polymers and copolymers by low temperature, low pressure methods in suspension, or by high temperature, high pressure methods conducted in a tubular reactor or pressure vessel, or by high temperature methods conducted in solution.Type: GrantFiled: September 6, 1989Date of Patent: January 22, 1991Assignee: Enichem Anic, S.p.A.Inventors: Fausto Calderazzo, Guido Pampaloni, Francesco Masi, Angelo Moalli, Renzo Invernizzi
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Patent number: 4980491Abstract: Vanadium-arenes [V(arene).sub.2 ] (arene=benzene or mono-, di-, or poly-alkyl-substituted benzene) are obtained, with a high yield, by means of the reduction of a vanadium-arene iodide with zinc, manganese or iron in metal form, or with cobalt di-(cyclopentadienyl).Vanadium-arenes are useful in the preparation of catalyst components active in ethylene polymerization, or in the copolymerization of ethylene in an alpha-olefin.Type: GrantFiled: April 30, 1990Date of Patent: December 25, 1990Assignee: Enichem Anic S.p.A.Inventors: Fausto Calderazzo, Guido Pampaloni, Francesco Masi, Angelo Moalli, Renzo Invernizzi
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Patent number: 4024228Abstract: Anhydrous gold trichloride is prepared by stirring a suspension of finely divided tetrachloro-auric acid, having the thionyl chloride at a temperature in the range from 20.degree. to 65.degree. C in the absence of light, whereby said tetrachloro-auric acid and thionyl chloride react to form the desired end product.Type: GrantFiled: March 4, 1974Date of Patent: May 17, 1977Assignee: Snam Progetti S.p.A.Inventors: Daniela Belli Dell'Amico, Fausto Calderazzo
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Patent number: 4006174Abstract: A chelated compound of uranium (IV) or thorium is prepared by reacting an anhydrous halide of uranium (IV) or thorium with a chelating agent such as acetylacetone in the presence of an anhydrous solvent and gaseous ammonia in the temperature range of 10 to 60.degree. C.Type: GrantFiled: October 25, 1974Date of Patent: February 1, 1977Assignee: Snam Progetti S.p.A.Inventors: Fausto Calderazzo, Marco Pasquali, Pierpaolo Garibaldi
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Patent number: 4003937Abstract: A method is disclosed for the preparation of ytterbium(III) beta-diketonates, the improvement consisting in that the reaction between an ytterbium(III) halide and a chelating agent (such as acetylacetone, dibenzoylmethane and dipivaloylmethane for example) is caused to take place in an anhydrous medium and in the presence of gaseous ammonia, the ytterbium(III) halide being also anhydrous.Type: GrantFiled: December 10, 1975Date of Patent: January 18, 1977Assignee: Snam Progretti S.p.A.Inventors: Pierpaolo Garibaldi, Fausto Calderazzo