Patents by Inventor Elena Bencini
Elena Bencini 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: 10329216Abstract: The invention relates to a new catalytic composition for the alkylation of aromatic compounds with alcohols, or mixtures of alcohols and corresponding olefins, wherein said composition comprises a zeolite of the MTW type and is characterized in that it contains one or more alkaline metals in a total quantity which is less than or equal to 0.02% by weight. The use of said catalyst in the alkylation of aromatic compounds with alcohols, in particular benzene with isopropanol or ethanol, allows the formation, as by-product, of the aldehyde or ketone corresponding to the alcohol used, to be minimized: the formation of reaction by-products of said aldehydes or ketones having a boiling point very close to that of polyalkylation products, is therefore significantly reduced. This provides a considerable advantage in the subsequent transalkylation step for the recovery of said polyalkylates by transformation into the corresponding monoalkylates.Type: GrantFiled: October 14, 2014Date of Patent: June 25, 2019Assignee: versalis S.p.A.Inventors: Elena Bencini, Giovanni Antonio Fois, Roberto Buzzoni
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Publication number: 20160297728Abstract: The invention relates to a new catalytic composition for the alkylation of aromatic compounds with alcohols, or mixtures of alcohols and corresponding olefins, wherein said composition comprises a zeolite of the MTW type and is characterized in that it contains one or more alkaline metals in a total quantity which is less than or equal to 0.02% by weight. The use of said catalyst in the alkylation of aromatic compounds with alcohols, in particular benzene with isopropanol or ethanol, allows the formation, as by-product, of the aldehyde or ketone corresponding to the alcohol used, to be minimized: the formation of reaction by-products of said aldehydes or ketones having a boiling point very close to that of polyalkylation products, is therefore significantly reduced. This provides a considerable advantage in the subsequent transalkylation step for the recovery of said polyalkylates by transformation into the corresponding monoalkylates.Type: ApplicationFiled: October 14, 2014Publication date: October 13, 2016Applicant: VERSALIS S.p.A.Inventors: Elena BENCINI, Giovanni Antonio FOIS, Roberto BUZZONI
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Patent number: 9096488Abstract: Process for the alkylation of aromatic hydrocarbons by means of aliphatic alcohols containing from 1 to 8 carbon atoms, which comprises feeding the hydrocarbon and alcohol to the head of a fixed-bed reactor, operating with “trickle flow” regime, containing at least one layer of a catalyst comprising a zeolite selected from medium-pore zeolites and large-pore zeolites.Type: GrantFiled: June 21, 2012Date of Patent: August 4, 2015Assignee: VERSALIS S.P.A.Inventors: Paolo Calaresu, Elena Bencini, Alessandro Casalini, Alessandro Del Seppia, Giovanni Antonio Fois
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Patent number: 9012696Abstract: Process for the alkylation of aromatic hydrocarbons by means of olefins containing from 2 to 8 carbon atoms, which comprises feeding the hydrocarbon, olefin, and possibly water, to the head of a fixed-bed reactor, operating with a “trickle flow” regime, containing at least one layer of a catalyst comprising a medium-or large-pore zeolite.Type: GrantFiled: June 21, 2012Date of Patent: April 21, 2015Assignee: Versalis S.p.AInventors: Paolo Calaresu, Alessandro Del Seppia, Elena Bencini, Giovanni Antonio Fois, Alessandro Casalini
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Publication number: 20140206909Abstract: Process for the alkylation of aromatic hydrocarbons by means of aliphatic alcohols containing from 1 to 8 carbon atoms, which comprises feeding the hydrocarbon and alcohol to the head of a fixed-bed reactor, operating with “trickle flow” regime, containing at least one layer of a catalyst comprising a zeolite selected from medium-pore zeolites and large-pore zeolites.Type: ApplicationFiled: June 21, 2012Publication date: July 24, 2014Applicant: VERSALIS S.P.A.Inventors: Paolo Calaresu, Elena Bencini, Alessandro Casalini, Alessandro Del Seppia, Giovanni Antonio Fois
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Publication number: 20140142348Abstract: Process for the alkylation of aromatic hydrocarbons by means of olefins containing from 2 to 8 carbon atoms, which comprises feeding the hydrocarbon, olefin, and possibly water, to the head of a fixed-bed reactor, operating with a “trickle flow” regime, containing at least one layer of a catalyst comprising a medium- or large-pore zeolite.Type: ApplicationFiled: June 21, 2012Publication date: May 22, 2014Applicant: Versalis S.P.A.Inventors: Paolo Calaresu, Alessandro Del Seppia, Elena Bencini, Giovanni Antonio Fois, Alessandro Casalini
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Patent number: 8658553Abstract: A catalytic composition for transalkylation of aromatic hydrocarbons which contains a zeolite and an inorganic binder and has an extra-zeolitic porosity higher than or equal to 0.7 cc/g for a fraction of pores of which at least 30% have a diameter greater than 100 nanometers. A catalytic composition having a crushing strength not lower than 1.7 kg/mm and an apparent density not higher than 0.5 g/cc. A process for transalkylating polyalkylated aromatic hydrocarbons using a catalytic composition.Type: GrantFiled: April 24, 2012Date of Patent: February 25, 2014Assignee: Polimeri Europa S.p.A.Inventors: Elena Bencini, Gianni Girotti
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Patent number: 8598388Abstract: Process for the preparation of phenol and cyclohexanone which comprises: a. the synthesis of cyclohexylbenzene by the hydro-alkylation of benzene by contact with hydrogen or the alkylation of benzene with cyclohexene using Y zeolites; b. the selective aerobic oxidation of cyclohexylbenzene to the corresponding hydroperoxide catalyzed by N-hydroxy-derivatives in the presence of polar solvents; and c. the scission of the hydroperoxide of cyclohexylbenzene to phenol and cyclohexanone by homogeneous or heterogeneous acid catalysts; characterized in that the synthesis of cyclohexylbenzene takes place in the presence of a catalytic system comprising a Y zeolite and an inorganic ligand wherein the Y zeolite has a crystalline structure with openings consisting of 12 tetrahedra and the inorganic ligand is ?-alumina, and wherein said catalytic composition is characterized by a pore volume, obtained by adding the mesoporosity and macroporosity fractions, greater than or equal to 0.Type: GrantFiled: June 23, 2010Date of Patent: December 3, 2013Assignee: Polimeri Europa S.p.A.Inventors: Elena Bencini, Cristian Gambarotti, Lucio Melone, Nadia Pastori, Simona Prosperini, Carlo Punta, Francesco Recupero
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Publication number: 20120270726Abstract: A catalytic composition for transalkylation of aromatic hydrocarbons which contains a zeolite and an inorganic binder and has an extra-zeolitic porosity higher than or equal to 0.7 cc/g for a fraction of pores of which at least 30% have a diameter greater than 100 nanometers. A catalytic composition having a crushing strength not lower than 1.7 kg/mm and an apparent density not higher than 0.5 g/cc. A process for transalkylating polyalkylated aromatic hydrocarbons using a catalytic composition.Type: ApplicationFiled: April 24, 2012Publication date: October 25, 2012Applicant: Polimeri Europa S.p.A.Inventors: Elena Bencini, Gianni Girotti
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Patent number: 8207388Abstract: A catalytic composition is described for the transalkylation of aromatic hydrocarbons comprising a zeolite and an inorganic binder, characterized by an extra-zeolitic porosity, i.e. the porosity obtained by adding the mesoporosity and the macroporosity fractions present in the catalytic composition, higher than or equal to 0.7 cc/g, which is such as to consist for a fraction of at least 30% of pores having a diameter greater than 100 nanometers. These catalytic compositions have a crushing strength not lower than 1.7 kg/mm and an apparent density not higher than 0.5 g/cc. A process is also described for the transalkylation of polyalkylated aromatic hydrocarbons which uses these catalytic compositions.Type: GrantFiled: December 15, 2003Date of Patent: June 26, 2012Assignee: Polimeri Europa S.p.A.Inventors: Elena Bencini, Gianni Girotti
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Publication number: 20120157718Abstract: Process for the preparation of phenol and cyclohexanone which comprises: a. the synthesis of cyclohexylbenzene by the hydro-alkylation of benzene by contact with hydrogen or the alkylation of benzene with cyclohexene using Y zeolites; b. the selective aerobic oxidation of cyclohexylbenzene to the corresponding hydroperoxide catalyzed by N-hydroxy-derivatives in the presence of polar solvents; and c. the scission of the hydroperoxide of cyclohexylbenzene to phenol and cyclohexanone by homogeneous or heterogeneous acid catalysts; characterized in that the synthesis of cyclohexylbenzene takes place in the presence of a catalytic system comprising a Y zeolite and an inorganic ligand wherein the Y zeolite has a crystalline structure with openings consisting of 12 tetrahedra and the inorganic ligand is ?-alumina, and wherein said catalytic composition is characterized by a pore volume, obtained by adding the mesoporosity and macroporosity fractions, greater than or equal to 0.Type: ApplicationFiled: June 23, 2010Publication date: June 21, 2012Applicant: POLIMERI EUROPA S.P.A.Inventors: Elena Bencini, Cristian Gambarotti, Lucio Melone, Nadia Pastori, Simona Prosperini, Carlo Punta, Francesco Recupero
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Patent number: 7393986Abstract: Process for the production of vinyl aromatic monomers which comprises: a) feeding an aromatic stream and an olefinic stream to an alkylation unit; b) feeding the reaction product coming from the alkylation section to a first separation section; c) recovering the mono-alkylated aromatic hydrocarbon and the heavy bottom product from the first separation section; d) feeding the mono-alkylated aromatic to a dehydrogenation section; e) feeding the reaction product coming from the dehydrogenation section to a second purification/separation section; f) also feeding the heavy bottom product of step (c) to the second purification/separation section; g) recovering a stream consisting of the vinyl aromatic monomer with a purity higher than 99.7 by weight.Type: GrantFiled: December 13, 2004Date of Patent: July 1, 2008Assignee: Polimeri Europa S.p.A.Inventors: Armando Galeotti, Elena Bencini, Leonardo Trentini
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Publication number: 20070142687Abstract: Process for the production of vinyl aromatic monomers which comprises: a) feeding an aromatic stream and an olefinic stream to an alkylation unit; b) feeding the reaction product coming from the alkylation section to a first separation section; c) recovering the mono-alkylated aromatic hydrocarbon and the heavy bottom product from the first separation section; d) feeding the mono-alkylated aromatic to a dehydrogenation section; e) feeding the reaction product coming from the dehydrogenation section to a second purification/separation section; f) also feeding the heavy bottom product of step (c) to the second purification/separation section; g) recovering a stream consisting of the vinyl aromatic monomer with a purity higher than 99.7 by weight.Type: ApplicationFiled: December 13, 2004Publication date: June 21, 2007Applicant: Polimeri Europa S.p.A.Inventors: Armando Galeotti, Elena Bencini, Leonardo Trentini
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Publication number: 20060258893Abstract: A catalytic composition is described for the transalkylation of aromatic hydrocarbons comprising a zeolite and an inorganic binder, characterized by an extra-zeolitic porosity, i.e. the porosity obtained by adding the mesoporosity and the macroporosity fractions present in the catalytic composition, higher than or equal to 0.7 cc/g, which is such as to consist for a fraction of at least 30% of pores having a diameter greater than 100 nanometers. These catalytic compositions have a crushing strength not lower than 1.7 kg/mm and an apparent density not higher than 0.5 g/cc. A process is also described for the transalkylation of polyalkylated aromatic hydrocarbons which uses these catalytic compositions.Type: ApplicationFiled: December 15, 2003Publication date: November 16, 2006Applicant: POLIMERI EUROPA S.p.A.Inventors: Elena Bencini, Gianni Girotti
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Patent number: 6034291Abstract: A catalytic composition is described for the alkylation and/or transalkylation of aromatic hydrocarbons consisting of beta zeolite, as such or modified by the isomorphous substitution of aluminum with boron, iron or gallium or by the introduction of alkaline and/or earth alkaline metals following an ion-exchange process, and an inorganic ligand, wherein the extrazeolite porosity, i.e. the porosity obtained by adding the mesoporosity and macroporosity fractions present in the catalytic composition itself, is such that a fraction of at least 25% is composed of pores with a radius higher than 100 .ANG., said composition being characterized by a total volume of extrazeolitic pores greater than or equal to 0.80 ml/g.Type: GrantFiled: December 10, 1997Date of Patent: March 7, 2000Assignee: Enichem S.p.A.Inventors: Gianni Girotti, Oscar Cappellazzo, Elena Bencini, Giannino Pazzuconi, Carlo Perego
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Patent number: 5866738Abstract: Process for the alkylation of aromatic compounds which comprises contacting an olefin with an aromatic hydro-carbon in the presence of a zeolite and under conventional operating conditions, characterized in that the aromatic hydrocarbon, before the alkylation, is: a) treated to eliminate the oxygen dissolved therein; and/or b) percolated through a fixed bed consisting of particles of alumina modified with silver.Type: GrantFiled: August 25, 1997Date of Patent: February 2, 1999Assignee: Enichem S.p.A.Inventors: Elena Bencini, Gino Goffredi, Eugenio Andreoli
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Patent number: 5536434Abstract: This invention relates to imido-derivative peroxycarboxylic acids having the formula I: ##STR1## wherein R and R.sub.1, which may be the same or different, represent hydrogen atoms, alkyl groups, or, taken together with the carbon atoms to which they are linked, give rise to a cyclic aliphatic ring, all of them being optionally substituted; the . . . symbol indicates a simple or an olefinic bond; R.sub.2 represents a hydrogen atom, an alkyl group, or an OH group, and n is an integer different from 0; the process for their preparation and their use as bleaching agents.Type: GrantFiled: October 20, 1989Date of Patent: July 16, 1996Assignee: Ausimont S.p.A.Inventors: Carlo Venturello, Claudio Cavallotti, Elena Bencini, Maria A. Sasso
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Patent number: 5003028Abstract: Thermoplastic linear aromatic polyetherdiketones containing repeating units of formula: ##STR1## wherein R is an arylene radical containing from 1 to 3 aromatic rings directly joined among them, or condensed, or joined by one or more of the following difunctional groups:--O--, --CO--; --CO--CO--, --SO.sub.2 --, --C(CH.sub.3).sub.2 --, --C(CF.sub.3).sub.2 --.Type: GrantFiled: May 8, 1989Date of Patent: March 26, 1991Assignee: Montedison S.p.AInventors: Marco Foa', Elena Bencini
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Patent number: 4639506Abstract: Polyphenylenethers are prepared by oxidative polymerization of phenols in the presence of oxygen and of organic bases (amines), by using copper-based catalysts having general formula:(B).sub.n (Cu).sub.a X.sub.b Y.sub.zwhereinB=optionally substituted naphthiridie group,X=halogen, or nitro group or perchlorate group,Y=bridge compound between the copper atoms, of the pyrazole or imidazole type,z=0 or 1, wherefore: when z=0,a and n, either like or unlike each other, are 1 or 2,b=an integer from 1 to 3, extremes included, while, when z=1:n=a=2b=3.Type: GrantFiled: April 9, 1985Date of Patent: January 27, 1987Assignee: Montedison S.p.A.Inventors: Luigi Sacconi, Marco Foa, Elena Bencini, Giampiero Sabarino
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Patent number: 4537970Abstract: This invention relates to the preparation of esters or salts of aromatic or etheroaromatic acids having formula Y--Ar--CO--OR (I), where:Ar represents an aromatic group constituted by one or more benzene rings, optionally condensed, or an etheroaromatic nucleus optionally condensed with one or more benzene rings;Y represents from zero to more substituents, equal or different, chosen among a halogen; an alkyl group having up to 6 carbon atoms; an alkoxy group having up to 5 carbon atoms; an ester group --COOR', where R' contains up to 5 carbon atoms; a hydroxyl group; a phenyloxy group, optionally substituted with groups inert under reaction conditions; a trifluoromethyl group; a nitrile group; an amidic group (--CONH.sub.2); an acetamidic group (--NH--CO--CH.sub.3); or an acyl group --CO--R", where R" represents a hydrocarbon group having up to 8 carbon atoms;R represents an alkyl group R.sub.1 having up to 5 carbon atoms or an alkali metal or alkaline earth metal M.Type: GrantFiled: December 12, 1983Date of Patent: August 27, 1985Assignee: Montedison S.p.A.Inventors: Marco Foa, Franco Francalanci, Andrea Gardano, Elena Bencini