Patents by Inventor Renato Paludetto
Renato Paludetto 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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Publication number: 20110237823Abstract: A continuous process for the production of an aromatic urethane from the reaction of an aromatic amine and an organic carbonate comprising the steps of passing the aromatic amine and the organic carbonate through a fixed bed reactor containing a zinc carbonate catalyst to produce the aromatic urethane and collecting the aromatic urethane.Type: ApplicationFiled: December 17, 2009Publication date: September 29, 2011Applicant: Dow Global Technologies LLCInventors: Pietro Tundo, Sandra Grego, Maurizio Rigo, Renato Paludetto
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Patent number: 6924406Abstract: A process for separating mixtures of hydrocarbon isomers on molecular sieves, including providing columns which include molecular sieves and function alternatively as secondary adsorption, primary adsorption, and desorption devices, feeding the mixtures of hydrocarbon isomers to a column functioning as the primary adsorption device for adsorbing isomers with greater selectivity towards the molecular sieves, feeding effluent of the mixtures from the column functioning as the primary adsorption device to a column functioning as the secondary adsorption device for adsorbing remaining isomers with greater selectivity, discharging isomers with a lower selectivity from the column functioning as the secondary adsorption device and a desorbing agent therein, feeding a desorbing agent to the column functioning as the desorption device, discharging isomers with a greater selectivity towards the molecular sieves and the desorbing agent in the column functioning as the desorption device.Type: GrantFiled: June 25, 2001Date of Patent: August 2, 2005Assignee: Enichem S.p.A.Inventors: Gianluca Girardi, Gianni Pandolfi, Renzo Bignazzi, Renato Paludetto
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Patent number: 6696614Abstract: Catalyst for steam cracking reactions consisting of pure mayenite having the general formula: 12CaO.7Al2O3 having an X-ray diffraction spectrum as indicated in Table I, obtained with a preparation process comprising the following steps: dissolution of salts containing calcium and aluminum with water; complexing of the dissolved salts by means of polyfunctional organic hydroxyacids; drying of the solution resulting from the completing in order to obtain a solid precursor product; calcination of the solid precursor product at a temperature ranging from 1300 to 1400° C. for at least two hours.Type: GrantFiled: December 4, 2002Date of Patent: February 24, 2004Assignees: ENICHEM S.p.A., ENITECNOLOGIE S.p.A.Inventors: Paolo Pollesel, Caterina Rizzo, Carlo Perego, Renato Paludetto, Gastone Del Piero
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Patent number: 6586360Abstract: Catalytic system for the oxidative dehydrogenation of alkylaromatics (in particular ethylbenzene) or paraffins to the corresponding alkenylaromatics (in particular styrene) or to the corresponding olefins, consisting of: a vanadium oxide; a bismuth oxide; and a carrier based on magnesium, wherein the vanadium, expressed as V2O5, is in a quantity ranging from 1 to 15% by weight, preferably from 2 to 10%, the bismuth, expressed as Bi2O3, ranges from 2 to 30% by weight, preferably from 5 to 25% by weight, the complement to 100 being the carrier.Type: GrantFiled: June 5, 2000Date of Patent: July 1, 2003Assignees: Enichem S.p.A., EniTecnologie S.p.A.Inventors: Patrizia Ingallina, Luciano Carluccio, Giuseppe Bellussi, Gastone Del Piero, Eugenio Andreoli, Renato Paludetto
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Publication number: 20030109376Abstract: Catalyst for steam cracking reactions consisting of pure mayenite having the general formula:Type: ApplicationFiled: December 4, 2002Publication date: June 12, 2003Applicants: ENICHEM S.p.A, ENITECNOLOGIE S.p.A.Inventors: Paolo Pollesel, Caterina Rizzo, Carlo Perego, Renato Paludetto, Gastone Del Piero
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Publication number: 20020062056Abstract: A process for separating hydrocarbon isomers in gas phase on molecular sieves, including feeding mixtures of hydrocarbon isomers to a primary adsorption column configured to adsorb isomers with a greater selectivity towards the molecular sieves, feeding effluent from the primary adsorption column to a secondary adsorption column configured to adsorb remaining isomers with a greater selectivity towards the molecular sieves and discharge a stream containing isomers with a lower selectivity towards the molecular sieves, feeding desorbing agent to a desorption column configured to discharge a stream containing isomers with a greater selectivity towards the molecular sieves and the desorbing agent, feeding the stream from the secondary adsorption column to a distillation unit configured to recover the desorbing agent for recycling to the desorption column, feeding the stream from the desorption column to another distillation unit configured to recover the desorbing agent for recycling to the desorption column.Type: ApplicationFiled: June 25, 2001Publication date: May 23, 2002Applicant: ENICHEM S.p.A.Inventors: Gianluca Girardi, Gianni Pandolfi, Renzo Bignazzi, Renato Paludetto
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Publication number: 20010021688Abstract: Catalyst for steam cracking reactions consisting of pure mayenite having the general formula:Type: ApplicationFiled: December 15, 2000Publication date: September 13, 2001Applicant: ENICHEM S.p.A.Inventors: Paolo Pollesel, Caterina Rizzo, Carlo Perego, Renato Paludetto, Gastone Del Piero
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Patent number: 5955640Abstract: Integrated process for the production of butene-1 which comprises feeding a C.sub.4 hydrocarbon stream to a separation unit of butene-1 and recycling the remaining stream to the same unit after treatment in a bond isomerization section to convert the remaining butenes-2 into butene-1, a molecular sieve separation unit is inserted in the cycle operating with the hydrocarbons in a vapour phase, for the purge of the paraffins.Type: GrantFiled: May 24, 1996Date of Patent: September 21, 1999Assignees: Enichem S.p.A., Snamprogetti S.p.A.Inventors: Renato Paludetto, Alfredo Orsi, Roberto Trotta, Gianni Donati
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Patent number: 5705673Abstract: The present invention relates to a continuous process for the preparation of phenyl methyl carbonate. The process is carried out in a first distillation column consisting of a lower reactive section and an upper rectification section and a second rectification column. The reactive section of the first column has a practically constant thermal profile at the optimum temperature for the reaction, and that with the use of the second column a circulation of dimethyl carbonate is created between the top and bottom of the first column which allows an advantageous excess of dimethylcarbonate to be fed to the bottom of the first column.Type: GrantFiled: December 18, 1996Date of Patent: January 6, 1998Assignee: Enichem S.p.A.Inventors: Franco Rivetti, Renato Paludetto, Ugo Romano
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Patent number: 5672771Abstract: Integrated process for the production of ter-amyl alkyl ethers which comprises the feeding of a C.sub.5 hydrocarbon stream to an etherification reactor and the recycling of the remaining stream to the same reactor, after treatment in an isomerization section to convert linear pentenes into reactive isoamylenes. An absorption section on molecular sieves is inserted between the etherification reactor and the isomerization section to eliminate inert hydrocarbons, basically i-pentane and n-pentane.Type: GrantFiled: October 23, 1995Date of Patent: September 30, 1997Assignees: Enichem S.p.A., Snamprogetti S.p.A.Inventors: Roberto Trotta, Gianni Donati, Renato Paludetto, Paolo Chiudaroli
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Patent number: 5563299Abstract: An integrated process for the simultaneous production of alkyl tert-butyl ethers and 1-butene, comprising feeding a C.sub.4 hydrocarbon stream to an etherification unit and recycling the remaining stream to the same unit after possible separation of the 1-butene and treatment in an isomerization section to convert the remaining butenes into isobutene, a molecular sieve separation unit operating with the hydrocarbons in the vapour phase being incorporated into the cycle.Type: GrantFiled: February 3, 1995Date of Patent: October 8, 1996Assignees: Enichem S.p.A, Snamprogetti S.p.A.Inventors: Renato Paludetto, Gianni Donati, Alfredo Orsi, Gianni Pandolfi, Roberto Trotta, Maura Brianti
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Patent number: 5510562Abstract: A processing cycle for separating C.sub.8 aromatics (mixtures of ortho-, para-, meta-xylene and ethylbenzene) is disclosed, in which a first subdivision of the mixture is preformed into two streams respectively comprising: para-xylene and ethylbenzene as the first stream; and meta- and ortho-xylene as the second stream followed by a separation of the first stream by rectification, during which ethylbenzene within specifications is obtained as the overhead fraction, with the second stream also being sent to a separation by rectification, with ortho-xylene within specifications being obtained as the bottom fraction. The possible content of C.sub.9 species can be furthermore removed by subsequent distillation.Type: GrantFiled: June 14, 1993Date of Patent: April 23, 1996Assignee: Enichem S.p.A.Inventors: Giancarlo Paret, Renato Paludetto
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Patent number: 5126498Abstract: The process for the separation of isomeric dichlorotoluenes, comprising the steps of:(a) passing a mixture containing isomeric dichlorotoluenes over a zeolite of the ZSM5 type having the composition (expressed in molar ratios) of (0.9+0.2) M.sub.2/n O:Al.sub.2 O.sub.3 : (10-100) SiO.sub.2 : z H.sub.2 O in which M is at least one cation selected from H, an alkali metal, an alkaline earth metal or a tetraalkylammonium cation; n is the valency of M; and z is between 0 and 40:(b) separating the non-adsorbed dichlorotoluenes;(c) contacting the zeolite containing the adsorbed isomers with an eluent; and(d) separating the isomers from the eluent.Type: GrantFiled: November 9, 1990Date of Patent: June 30, 1992Assignee: AtochemInventors: Sergio Carra, Renato Paludetto, Guiseppe Storti, Massimo Morbidelli, Bernard Gurtner, Raymond Commandeur
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Patent number: 4766262Abstract: A process for separating dichlorotoluene isomers from a mixture containing at least two dichlorotoluene isomers comprising(a) passing said mixture containing dichlorotoluene isomers through a mordenite having the following composition; in molar ratios:a H.sub.2 O: b M.sub.2/n O: Al.sub.2 O.sub.3 : (10-400 SiO.sub.2)in which M is hydrogen or at least one cation selected from an alkali metal or an alkaline-earth metal with the exception of cesium and rubidium, n is the valence of M, 0.7.ltoreq.a+b.ltoreq.1.1, and 0.ltoreq.b.ltoreq.0.2,(b) separating the non-adsorbed dichlorotoluenes from said mordenite,(c) contacting said mordenite containing the adsorbed isomers with a desorbent capable of separating said isomers from said mordenite, and(d) separating the desorbed isomers from the desorbent.Type: GrantFiled: November 3, 1986Date of Patent: August 23, 1988Assignee: AtochemInventors: Sergio Carra, Renato Paludetto, Giuseppe Storti, Massimo Morbidelli, Bernard Gurtner, Raymond Commandeur