Patents by Inventor Giorgio Bornengo
Giorgio Bornengo 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: 5505310Abstract: A process for the selective flotation of at least one sulfide selected from the group of copper sulfide, silver sulfide, and activated zinc sulfide performed in the presence of 2-mercapto-benzoxazole derivatives.Type: GrantFiled: July 15, 1994Date of Patent: April 9, 1996Assignee: Consiglio Nazionale delle RicercheInventors: Anna Marabini, Giorgio Bornengo, Vittorio Alesse, Fabrizio Bergamini
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Patent number: 5138047Abstract: This invention relates to improved catalytic process for the manufacture of copper phthalocyanine by allowing phthalic anhydride to react with urea and a copper compound, in the presence of a hydrophobic liquid (dispersing agent), characterized by the presence, along with the catalyst and the dispersing agent, of a promoter selected from particular classes of amides, imides, ureas, thioureas, guanidines, amines or sulphoxides.Type: GrantFiled: December 6, 1990Date of Patent: August 11, 1992Assignee: ACNA Chimica Organica S.P.A.Inventors: Giorgio Bornengo, Giovanni Agnes, Augusto Menconi, Giorgio Bottaccio, Zafferino Bozzolasco, Danilo Domenis
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Patent number: 5120432Abstract: A process for the selective flotation of metal ores is described, wherein ionic organic collectors are utilized, which have the formula: ##STR1## where R and R.sub.1, like or different from each other, represent: H, a halogen, a straight or branched C.sub.1-9 alkyl group, an alkoxyl or hydroxyalkyl group in which the alkyl moiety contains from 1 to 9 carbon atoms, or a phenyl group; and M represents: H, Na, K, Li, Cs, NH.sub.4.Type: GrantFiled: January 16, 1991Date of Patent: June 9, 1992Assignee: Consiglio Nazionale Delle RicercheInventors: Giorgio Bornengo, Anna Marabini, Vittorio Alesse
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Patent number: 4954643Abstract: An improved process for the preparation of perfluoropropene oxide by the reaction of perfluoropropene with hydrogen peroxide in an aqueous alkaline medium is described. The improved process is characterized by carrying out the reaction in the presence of a phase-transfer catalyst selected from the group consisting of quaternary ammonium salts, phosphonium salts, and lipophilic complexing agents for cations, and by carrying out the addition of an aqueous solution of an inorganic base to the reaction mixture gradually so that a constant reaction temperature between -10.degree. C. and -60.degree. C. is maintained.Type: GrantFiled: January 31, 1989Date of Patent: September 4, 1990Inventors: Giorgio Bornengo, Filippo M. Carlini, Michele Pontevivo, Giorgio Bottaccio
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Patent number: 4851037Abstract: Ionic organic collecting agents for the selective flotation of lead and zinc ores, said agents having the following general formula ##STR1## wherein the symbols employed have the meaning given below: R represents H, CH.sub.3, C.sub.2 H.sub.5, or an alkoxyalkyl group,R.sub.1 and R.sub.2, which can be the same or different, represent H, a linear or a branched alkyl group, an alkoxyalkyl group or a hydroxyalkyl group containing up to 12 carbon atoms;X represents H, Cl, Br, I, F, CN, CONH.sub.2, NO.sub.2 ;m represents H, Na, K, Li, Cs;as well as a process for the production of said collecting agents.Type: GrantFiled: October 9, 1987Date of Patent: July 25, 1989Assignee: Consiglio Nazionale Delle RicercheInventors: Giorgio Bornengo, Filippo M. Carlini, Anna Marabini, Vittorio Alesse
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Patent number: 4816608Abstract: Process for the preparation of (2,2)-paracyclophane or derivatives thereof by the Hofmann elimination of p-methylbenzyl-trimethylammonium hydroxide or derivatives thereof, in an aqueous solution of an alkali metal hydroxide, wherein said elimination is carried out in the presence of a compound of the formula (I):Y--A--(X).sub.n (I)wherein A represents an aromatic group, Y an electron donor group, X an electron acceptor group, and n is an integer from 1 to 3.Type: GrantFiled: June 26, 1987Date of Patent: March 28, 1989Assignee: Montedison S.p.A.Inventors: Giorgio Bornengo, Alessandro Malacrida, Stefano Campolmi, Maurizio A. Beretta
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Patent number: 4795838Abstract: Process for the preparation of (2,2)-paracyclophane or derivatives thereof by the Hofmann elimination of p-methylbenzyltrimethylammonium hydroxide or derivatives thereof, in an aqueous solution of an alkali metal hydroxide, wherein said elimination is carried out in the presence of a dialkylether of mono- and poly-ethylene glycols having the formula:R--O--CH.sub.2 CH.sub.2 O--.sub.n R' (I)wherein R and R', which may be the same or different, represent alkyl groups having from 1 to 5 carbon atoms, and n is an integer from 1 to 5.Type: GrantFiled: June 26, 1987Date of Patent: January 3, 1989Assignee: Montedison S.p.A.Inventors: Giorgio Bornengo, Alessandro Malacrida, Stefano Campolmi, Maurizio A. Beretta
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Patent number: 4772756Abstract: A process for the preparation of fluoroalkyl ethers of the formula: ##STR1## wherein: Y is Br or F;X is F, Cl or Br or their mixtures when n is equal to or higher than 2;n is within the range of from 0 to 4;R.sub.f represents a perfluoroalkylene radical containing from 1 to 8 carbon atoms.The process is characterized in that a fluoroalkoxy perfluoroacyl fluoride of the formula: ##STR2## is slowly heated with a salifying agent and a solvent, in the presence of a catalytic amount of N,N-dimethylformamide, with an end temperature within the range of from 60.degree. to 150.degree. C. being reached.Type: GrantFiled: September 14, 1987Date of Patent: September 20, 1988Assignee: Ausimont S.p.A.Inventors: Giorgio Bornengo, Michele Pontevivo, Antonio Marraccini, Silvana Modena
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Patent number: 4729856Abstract: Process for the preparation of 2-perfluoropropoxy-perfluoropropionyl fluoride by dimerization of hexafluoropropene epoxide in aprotic polar medium, in the presence of N,N,N',N'-tetrasubstituted diaminodifluoromethane as catalyst, characterized in that the dimerization reaction is carried out in the presence of a co-catalyst constituted by a nitrogenous organic base having structure of aniline, or of pyridine, or of a derivative thereof, wherein the nitrogen atom is not linked to hydrogen atoms and, in the case of the pyridine-type structure, it is sterically hindered by substituent groups on ortho-position relatively to it.Type: GrantFiled: May 20, 1986Date of Patent: March 8, 1988Assignee: Ausimont S.p.A.Inventors: Giorgio Bornengo, Filippo M. Carlini, Michele Pontevivo, Giorgio Guglielmo
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Patent number: 4724072Abstract: Organic ionic collecting agents for the selective flotation of lead and zinc ores, said agents having the following general formula: ##STR1## wherein the symbols have the following meanings: R represents an alkoxyl group having from 3 to 12 carbon atoms;R.sub.1 represents H, a linear or branched chain alkyl group, an alkoxyl or hydroxyalkyl group containing up to 12 carbon atoms;X represents H, Cl, Br, I, F, CN, CONH.sub.2, NO.sub.2, SO.sub.2 NH.sub.2 ;M represents H, Na, K, Li, Cs.Type: GrantFiled: April 29, 1986Date of Patent: February 9, 1988Assignee: Consiglio Nazionale Delle RicercheInventors: Giorgio Bornengo, Filippo M. Carlini, Maria A. Marabini, Vittorio Alesse
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Patent number: 4263204Abstract: A new class of hydrosoluble monoazoic cationic dyes free of sulphonic or carboxylic groups and derived from 1-phenyl-3-aminopyrazoles is disclosed, as are, also, processes for preparing the new dyes and use thereof in the dyeing and printing of synthetic fibers.Type: GrantFiled: November 28, 1978Date of Patent: April 21, 1981Assignee: Montedison S.p.A.Inventors: Fabrizio Merlo, Ruggero Battisti, Giorgio Bornengo, Nicola Mazzaferro, Angelo Mangini, Antonio Tundo
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Patent number: 4198516Abstract: The present invention concerns a class of compounds useful as dispersed dyes and insoluble in water, having the general formula (I): ##STR1## wherein the symbols have the following meaning: R is selected from the group consisting of an alkyl group having up to 5 carbon atoms, a group --CH.sub.2 --COOX, wherein X stands for an alkyl group having up to 4 carbon atoms; a group ##STR2## and a group --CH.sub.2 --CH.sub.2 --CN; R.sub.1 represents an H atom, a halogen atom (preferably Cl or Br) and an NO.sub.2 group.The dyes of this invention, are particularly suited for the dyeing and printing of synthetic fibres, in particular of polyester fibres.The shades vary from yellow-green to orange. They possess an excellent affinity as well as an excellent fastness to light both in the deep tones as well as in the bright tones.Good fastnesses are also found against sublimation, to solvents and to washing.Type: GrantFiled: January 29, 1979Date of Patent: April 15, 1980Assignee: Montedison S.p.A.Inventors: Fabrizio Merlo, Giorgio Bornengo
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Patent number: 4187218Abstract: This invention relates to a class of water-soluble acid azo dyes, containing at least a sulphonic group, having formula (I): ##STR1## wherein the symbols have the following meanings: A is a residue of a diazotizable aromatic or heterocyclic amine, optionally substituted;R is selected from the group consisting of H, CH.sub.3, OCH.sub.3 and OC.sub.2 H.sub.5 ;R.sub.1 is selected from the group consisting of CH.sub.3 and C.sub.2 H.sub.5 ;R.sub.2 is selected from the group consisting of CH.sub.3 and C.sub.2 H.sub.5.The dyes which are the object of the present invention exhibit shades varying from yellow to blue and are useful for dyeing and printing natural polyamide fibres (wool and silk) and synthetic fibres (nylon). They possess an excellent affinity in both an acid bath and a neutral bath and an excellent tinting power. The dyes obtained are characterized by a remarkable purity of shade, by an excellent stability to sunlight, to washing and to sweat, as well as by a good equalizing power on nylon.Type: GrantFiled: March 15, 1978Date of Patent: February 5, 1980Assignee: Montedison S.p.A.Inventors: Fabrizio Merlo, Giorgio Bornengo, Camillo Paffoni