Patents by Inventor Giordano De Alberti
Giordano De Alberti 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: 7122501Abstract: A description follows of a bimetallic catalyst, obtained by dispersing in sequence and alternating the precursors of the single metal components of the catalyst on a carrier, and a process for the synthesis of hydrogen peroxide by the direct reaction of hydrogen with oxygen, in a solvent medium containing a halogenated promoter and an acid promoter, in the presence of said catalyst.Type: GrantFiled: March 26, 2003Date of Patent: October 17, 2006Assignees: Eni S.p.A., Enichem S.p.A.Inventors: Giuseppe Paparatto, Rino D'Aloisio, Giordano De Alberti, Roberto Buzzoni
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Patent number: 7105142Abstract: A process is described for the production of hydrogen peroxide from hydrogen and oxygen in a reaction solvent containing a halogenated promoter and/or an acid promoter, in the presence of a heterogeneous catalyst based on one or more metals of the platinum group, wherein the reaction solvent consists of: (1) an alcohol or mixture of alcohols; (2) an aliphatic ether having general formula (I); and (3) optionally water. The solvent mixture may also contain one or more C5–C32 hydrocarbons. The process operates under high safety conditions with a high productivity and molar selectivity towards the formation of H2O2.Type: GrantFiled: April 29, 2002Date of Patent: September 12, 2006Assignees: Eni S.p.A., Polimeri Europa S.p.A.Inventors: Giuseppe Paparatto, Giordano De Alberti, Rino D'Aloisio
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Patent number: 7101526Abstract: The present invention relates to a catalyst consisting of: (a) one or more metals of the platinum group as active components; (b) one or more polyolefins; and (c) a carrier. The invention also relates to a process for the synthesis of hydrogen peroxide (H2O2) from hydrogen and oxygen which uses said catalyst and the use of the hydrogen peroxide solution in oxidation processes catalyzed by titanium silicalite. The process operates under high safety conditions with a high productivity and molar selectivity towards the formation of H2O2.Type: GrantFiled: July 30, 2002Date of Patent: September 5, 2006Assignees: ENI S.p.A., Polimeri Europa S.p.A.Inventors: Giuseppe Paparatto, Giordano De Alberti, Rino D'Aloisio, Roberto Buzzoni
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Patent number: 7048905Abstract: Process for the production of concentrated aqueous solutions of hydrogen peroxide, comprising the following steps: (a) feeding to a reactor containing a catalyst based on palladium and platinum, heterogeneous and maintained in dispersion in a liquid reaction medium: (i) a liquid stream consisting of an alcohol or a mixture of C1–C3 alcohols or a mixture of said alcohols with water containing at least 50% by weight of alcohol, also containing an acid promoter and a halogenated promoter, the alcohol and optionally all or part of the water contained in the stream being recycled from the subsequent phase d); (ii) a gaseous stream containing hydrogen, oxygen and an inert gas, characterized in that the concentration of the hydrogen is less than 4.Type: GrantFiled: August 3, 2001Date of Patent: May 23, 2006Assignees: Polimeri Europa S.p.A., ENI S.p.A.Inventors: Giuseppe Paparatto, Franco Rivetti, Pietro Andrigo, Giordano De Alberti, Ugo Romano
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Patent number: 6888013Abstract: The present invention relates to an integrated process for the preparation in continuous of epoxides which comprises: (a) preparing an alcoholic or hydro-alcoholic solution of hydrogen peroxide in a concentration of over 3% by weight, using a gaseous stream containing hydrogen, oxygen and an inert gas, in the presence of a bimetallic catalyst based on palladium and platinum as active components; (b) putting the alcoholic or hydro-alcoholic solution of hydrogen peroxide obtained in step (a) in contact with an olefin and a buffering agent, in the presence of an epoxidation catalyst suspended in the reaction solvent, in order to obtain a reaction mixture containing the epoxide corresponding to the olefin, water and alcoholic solvent; (c) treating the alcoholic stream leaving step (b), after separation of the epoxide, in order to eliminate the nitrogenated compounds present; (d) feeding the alcoholic solvent obtained in (c) to step (a).Type: GrantFiled: August 6, 2001Date of Patent: May 3, 2005Assignee: Polimeri Europa S.p.A.Inventors: Giuseppe Paparatto, Anna Forlin, Giordano De Alberti, Rino D'Aloisio, Paolo Tegon
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Publication number: 20040184983Abstract: The present invention relates to a catalyst consisting of: (a) one or more metals of the platinum group as active components; (b) one or more polyolefins; and (c) a carrier. The invention also relates to a process for the synthesis of hydrogen peroxide (H2O2) from hydrogen and oxygen which uses said catalyst and the use of the hydrogen peroxide solution in oxidation processes catalyzed by titanium silicalite. The process operates under high safety conditions with a high productivity and molar selectivity towards the formation of H2O2.Type: ApplicationFiled: January 30, 2004Publication date: September 23, 2004Inventors: Giuseppe Paparatto, Giordano De Alberti, Rino D'Aloisio, Roberto Buzzoni
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Publication number: 20040151660Abstract: A process is described for the production of hydrogen peroxide from hydrogen and oxygen in a reaction solvent containing a halogenated promoter and/or an acid promoter, in the presence of a heterogeneous catalyst based on one or more metals of the platinum group, wherein the reaction solvent consists of: (1) an alcohol or mixture of alcohols; (2) an aliphatic ether having general formula (1); and (3) optionally water. The solvent mixture may also contain one or more C5-C32 hydrocarbons. The process operates under high safety conditions with a high productivity and molar selectivity towards the formation of H2O2.Type: ApplicationFiled: April 6, 2004Publication date: August 5, 2004Inventors: Giuseppe Paparatto, Giordano de Alberti, Rino D'Aloisio
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Publication number: 20040151659Abstract: A process is described for the production of hydrogen peroxide from hydrogen and oxygen in a reaction solvent containing a halogenated promoter and/or an acid promoter, in the presence of a heterogeneous catalyst based on one or more metals of the platinum group, wherein the reaction solvent consists of: (1) an alcohol or mixture of alcohols; (2) one or more C5-C32 hydrocarbons; and (3) optionally water. The process operates under high safety conditions with a high productivity and molar selectivity towards the formation of H2O2.Type: ApplicationFiled: March 31, 2004Publication date: August 5, 2004Inventors: Giuseppe Paparatto, Giordano De Alberti, Rino D'Aloisio
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Publication number: 20040054200Abstract: The present invention relates to an integrated process for the preparation in continuous of epoxides which comprises: (a) preparing an alcoholic or hydro-alcoholic solution of hydrogen peroxide in a concentration of over 3% by weight, using a gaseous stream containing hydrogen, oxygen and an inert gas, in the presence of a bimetallic catalyst based on palladium and platinum as active components; (b) putting the alcoholic or hydro-alcoholic solution of hydrogen peroxide obtained in step (a) in contact with an olefin and a buffering agent, in the presence of an epoxidation catalyst suspended in the reaction solvent, in order to obtain a reaction mixture containing the epoxide corresponding to the olefin, water and alcoholic solvent; (c) treating the alcoholic stream leaving step (b), after separation of the epoxide, in order to eliminate the nitrogenated compounds present; (d) feeding the alcoholic solvent obtained in (c) to step (a).Type: ApplicationFiled: September 25, 2003Publication date: March 18, 2004Inventors: Giuseppe Paparatto, Anna Forlin, Giordano De Alberti, Rino D'Aloisio, Paolo Tegon
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Publication number: 20040037769Abstract: Process for the production of concentrated aqueous solutions of hydrogen peroxide, comprising the following steps: (a) feeding to a reactor containing a catalyst based on palladium and platinum, heterogeneous and maintained in dispersion in a liquid reaction medium: (i) a liquid stream consisting of an alcohol or a mixture of C1-C3 alcohols or a mixture of said alcohols with water containing at least 50% by weight of alcohol, also containing an acid promoter and a halogenated promoter, the alcohol and optionally all or part of the water contained in the stream being recycled from the subsequent phase d); (ii) a gaseous stream containing hydrogen, oxygen and an inert gas, characterized in that the concentration of the hydrogen is less than 4.Type: ApplicationFiled: July 10, 2003Publication date: February 26, 2004Inventors: Giuseppe Paparatto, Franco Rivetti, Pietro Andrigo, Giordano De Alberti, Ugo Romano
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Patent number: 6649140Abstract: A process is described for the continuous production of alcoholic or hydro-alcoholic solutions of hydrogen peroxide in a concentration ranging from 2 to 10% by weight and their direct use in oxidation processes. The process operates under high safety conditions and with a high productivity and molar selectivity towards the formation of H2O2.Type: GrantFiled: June 1, 2001Date of Patent: November 18, 2003Assignees: Eni S.p.A., Enichem S.p.A.Inventors: Giuseppe Paparatto, Franco Rivetti, Pietro Andrigo, Giordano De Alberti
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Patent number: 6630118Abstract: A bimetallic catalyst is obtained by dispersing, in sequence and alternating, the precursors of the single metal components of the catalyst on a carrier. A process for the synthesis of hydrogen peroxide by the direct reaction of hydrogen with oxygen, in a solvent medium containing a halogenated promoter and an acid promoter, in the presence of the bimetallic catalyst.Type: GrantFiled: June 1, 2001Date of Patent: October 7, 2003Assignees: Eni S.p.A., Enichem S.p.A.Inventors: Giuseppe Paparatto, Rino D'Aloisio, Giordano De Alberti, Roberto Buzzoni
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Publication number: 20030162657Abstract: A description follows of a bimetallic catalyst, obtained by dispersing in sequence and alternating the precursors of the single metal components of the catalyst on a carrier, and a process for the synthesis of hydrogen peroxide by the direct reaction of hydrogen with oxygen, in a solvent medium containing a halogenated promoter and an acid promoter, in the presence of said catalyst.Type: ApplicationFiled: March 26, 2003Publication date: August 28, 2003Applicant: ENI S.p.A.Inventors: Giuseppe Paparatto, Rino D'Aloisio, Giordano De Alberti, Roberto Buzzoni
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Patent number: 6541648Abstract: The present invention relates to an integrated process for the preparation in continuous of epoxides which comprises: (a) preparing an alcoholic or hydro-alcoholic solution of hydrogen peroxide in a concentration of over 3% by weight, using a gaseous stream containing hydrogen, oxygen and an inert gas, in the presence of a bimetallic catalyst based on palladium and platinum as active components; (b) putting the alcoholic or hydro-alcoholic solution of hydrogen peroxide obtained in step (a) in contact with an olefin and a buffering agent, in the presence of an epoxidation catalyst suspended in the reaction solvent, in order to obtain a reaction mixture containing the epoxide corresponding to the olefin, water and the alcoholic solvent; (c) treating the alcoholic stream leaving step (b), after separation of the epoxide, in order to eliminate the nitrogenated compounds present; (d) feeding the alcoholic solvent obtained in (c) to step (a).Type: GrantFiled: June 26, 2002Date of Patent: April 1, 2003Assignee: Polimeri Europa S.r.l.Inventors: Giuseppe Paparatto, Anna Forlin, Giordano De Alberti, Rino D'Aloisio, Paolo Tegon
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Publication number: 20020028174Abstract: A description follows of a bimetallic catalyst, obtained by dispersing in sequence and alternating the precursors of the single metal components of the catalyst on a carrier, and a process for the synthesis of hydrogen peroxide by the direct reaction of hydrogen with oxygen, in a solvent medium containing a halogenated promoter and an acid promoter, in the presence of said catalyst.Type: ApplicationFiled: June 1, 2001Publication date: March 7, 2002Applicant: ENI S.p.A.Inventors: Giuseppe Paparatto, Rino D' Aloisio, Giordano De Alberti, Roberto Buzzoni
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Publication number: 20020025293Abstract: A process-is described for the continuous production of alcoholic or hydro-alcoholic solutions of hydrogen peroxide in a concentration ranging from 2 to 10% by weight and their direct use in oxidation processes.Type: ApplicationFiled: June 1, 2001Publication date: February 28, 2002Applicant: ENI S.p.AInventors: Giuseppe Paparatto, Franco Rivetti, Pietro Andrigo, Giordano De Alberti
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Patent number: 6337296Abstract: The present invention relates to a process for the preparation of catalysts suitable for the transposition reaction of oximes to amides. The process consists in englobing submicronic particles of MFI-type zeolites in a siliceous ligand substantially inactive in the above reactions.Type: GrantFiled: October 29, 1999Date of Patent: January 8, 2002Assignee: Enichem S.p.A.Inventors: Luigi Balducci, Roberto Buzzoni, Leonardo Dalloro, Giordano De Alberti
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Patent number: 6284213Abstract: The present invention relates to a catalyst consisting of a metal of the VIII group supported on acid activated carbon functionalized with sulfonic groups, a process for the synthesis of hydrogen peroxide from hydrogen and oxygen which uses said catalyst and the use of the hydrogen peroxide solution in oxidation processes catalyzed by titanium-silicalite.Type: GrantFiled: August 3, 1999Date of Patent: September 4, 2001Assignee: Enichem S.p.A.Inventors: Giuseppe Paparatto, Rino D'Aloisio, Giordano De Alberti, Piero Furlan, Vittorio Arca, Roberto Buzzoni, Laura Meda
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Patent number: 5942613Abstract: Process for the preparation of amides via the catalytic rearrangement of oximes which comprises putting an oxime in vapor phase in contact with a catalyst selected from a mesoporous silica-alumina having a molar ratio SiO/Al.sub.2 O.sub.2 of between 20 and 1000, an average pore diameter of between 20 and 100 .ANG. and an X-ray diffraction pattern (XRD) from powders which, after calcination, has the deepest reflection at d-spacing of more than 18 .ANG. (2.theta.<4.9.degree., CuK.alpha. radiation).Type: GrantFiled: July 9, 1997Date of Patent: August 24, 1999Assignee: Enichem S.p.A.Inventors: Angela Carati, Carlo Perego, Leonardo Dalloro, Giordano De Alberti, Stefano Palmery
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Patent number: 5914398Abstract: Process for the preparation of caprolactam by the catalytic rearrangement of cyclohexanone oxime in which a vapour phase oxime is contacting a catalyst selected from an essentially amorphous, micro-mesoporous silica-alumina having a molar ratio SiO.sub.2 /Al.sub.2 O.sub.3 of 30 to 5000, a surface area of at least 500 m.sup.2 /g and a total pore volume of 0.3 to 1.3 ml/g.Type: GrantFiled: July 3, 1997Date of Patent: June 22, 1999Assignee: Enichem S.p.AInventors: Angela Carati, Carlo Perego, Leonardo Dalloro, Giordano De Alberti, Stefano Palmery