Patents by Inventor Giovanni Antonio Fois
Giovanni Antonio Fois 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: 11840494Abstract: A process for treating mixtures containing polyalkylaromatic hydrocarbons, intended for transalkylation processes, includes a mild reduction with hydrogen in the presence of a suitable hydrogenation catalyst. The process also relates to a transalkylation process of polyalkylaromatic hydrocarbons having the treatment.Type: GrantFiled: August 21, 2020Date of Patent: December 12, 2023Assignee: VERSALIS S.P.A.Inventors: Roberto Buzzoni, Giovanni Antonio Fois
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Publication number: 20220332664Abstract: A process for treating mixtures containing polyalkylaromatic hydrocarbons, intended for transalkylation processes, includes a mild reduction with hydrogen in the presence of a suitable hydrogenation catalyst. The process also relates to a transalkylation process of polyalkylaromatic hydrocarbons having the treatment.Type: ApplicationFiled: August 21, 2020Publication date: October 20, 2022Inventors: Roberto BUZZONI, Giovanni Antonio FOIS
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Patent number: 11261138Abstract: The invention relates to a process for producing olefins from alcohols by means of catalytic dehydration. More in particular, the present invention relates to a process for producing at least one olefin by dehydrating at least one alcohol having a number of carbon atoms comprised between 2 and 6, preferably comprised between 2 and 4, more preferably at least one alcohol having a number of carbon atoms of 3, even more preferably 2-propanol, in the presence of a catalytic material comprising at least one large pore zeolite in acid form, or predominantly acid form, preferably selected from the group consisting of zeolites having BEA structure, MTW structure and mixtures thereof, and preferably at least one inorganic binder, more preferably alumina. Preferably, the olefin has the same number of carbon atoms as the starting alcohol. Furthermore, preferably the olefin does not contain conjugated double bonds and more preferably the olefin is a mono-olefin.Type: GrantFiled: July 2, 2018Date of Patent: March 1, 2022Assignee: Versalis S.P.A.Inventors: Giovanni Antonio Fois, Roberto Buzzoni
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Publication number: 20210147316Abstract: The invention relates to a process for producing olefins from alcohols by means of catalytic dehydration. More in particular, the present invention relates to a process for producing at least one olefin by dehydrating at least one alcohol having a number of carbon atoms comprised between 2 and 6, preferably comprised between 2 and 4, more preferably at least one alcohol having a number of carbon atoms of 3, even more preferably 2-propanol, in the presence of a catalytic material comprising at least one large pore zeolite in acid form, or predominantly acid form, preferably selected from the group consisting of zeolites having BEA structure, MTW structure and mixtures thereof, and preferably at least one inorganic binder, more preferably alumina. Preferably, the olefin has the same number of carbon atoms as the starting alcohol. Furthermore, preferably the olefin does not contain conjugated double bonds and more preferably the olefin is a mono-olefin.Type: ApplicationFiled: July 2, 2018Publication date: May 20, 2021Inventors: Giovanni Antonio FOIS, Roberto BUZZONI
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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: 7157397Abstract: A process is described for the synthesis of mesitylene, characterized in that mesitylene is obtained starting exclusively from pseudocumene, without the use of any other chemical compound, operating in continuous, at a temperature ranging from 225 to 400° C., at a pressure ranging from 1 to 50 bar, at a weight space velocity ranging from 0.1 to 10 hours?1, and in the presence of a catalyst containing a zeolite selected from ZSM-5 zeolite having a crystal lattice based on silicon oxide and aluminum oxide, and ZSM-5 zeolite modified by the partial or total substitution of Si with a tetravalent element such as Ti or Ge and/or the partial or total substitution of Al with other trivalent elements, such as Fe, Ga or B.Type: GrantFiled: February 26, 2004Date of Patent: January 2, 2007Assignees: Polimeri Europa S.p.A., Enitecnologie S.p.A.Inventors: Leonardo Dalloro, Alberto Cesana, Robert{dot over (o)} Buzzoni, Franco Rivetti, Giovanni Antonio Fois, Caterina Rizzo, Virginio Arrigoni
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Publication number: 20040225170Abstract: A process is described for the synthesis of mesitylene, characterized in that mesitylene is obtained starting exclusively from pseudocumene, without the use of any other chemical compound, operating in continuous, at a temperature ranging from 225 to 400° C., at a pressure ranging from 1 to 50 bar, at a weight space velocity ranging from 0.1 to 10 hours−1, and in the presence of a catalyst containing a zeolite selected from ZSM-5 zeolite having a crystal lattice based on silicon oxide and aluminum oxide, and ZSM-5 zeolite modified by the partial or total substitution of Si with a tetravalent element such as Ti or Ge and/or the partial or total substitution of Al with other trivalent elements, such as Fe, Ga or B.Type: ApplicationFiled: February 26, 2004Publication date: November 11, 2004Applicants: POLIMERI EUROPA S.p.A., ENITECNOLOGIE S.p.A.Inventors: Leonardo Dalloro, Alberto Cesana, Roberto Buzzoni, Franco Rivetti, Giovanni Antonio Fois, Caterina Rizzo, Virginio Arrigoni