Abstract: A process for preparing a metal catalyst for the hydrogenation of oils and ats comprises causing a soluble Ni salt to react with an alkylsilane and an organic orthosilicate, so as to generate the catalyst support in Situ.
Type:
Grant
Filed:
June 15, 1994
Date of Patent:
November 5, 1996
Assignee:
Ministero Dell `Universita` e Della Ricerca Scientifica e Technologica
Inventors:
Giuseppe Gubitosa, Maurizio Giampeitri, Giuliano Vecchiato
Abstract: Compounds, useful as radiolabeling reagents, including a trihalogenated phenyl ring and having the formula ##STR1## wherein X.sub.1, X.sub.2 and X.sub.3 are halogens, one of which may be a radiohalogen, are disclosed. The invention further includes radiohalogenated proteins as well as processes for preparing such reagents and radiohalogenated proteins.
Type:
Grant
Filed:
June 6, 1995
Date of Patent:
October 29, 1996
Assignee:
Bracco International B.V.
Inventors:
Marc Ogan, Frank P. Tomasella, Jan-I Tu
Abstract: The present process involves ring opening and ring closure of compounds containing a tetrahydrofuroyl ##STR1## to provide facile synthesis of compounds containing a piperidin-2-one group of the formula ##STR2##
Type:
Grant
Filed:
July 15, 1994
Date of Patent:
September 24, 1996
Assignee:
Bracco International B.V.
Inventors:
Ramachandran S. Ranganathan, Thangavel Arunachalam, Kenneth J. Natalie, Jr.
Abstract: In accordance with the present invention a novel method and composition for using nonionic contrast media to reduce the risk of clot formation in a diagnostic procedure is disclosed. Novel compositions for such method are also disclosed. The present method comprises employing a triiodinated phenyl contrast agent having a heterocyclic group or a dimeric triiodinated phenyl contrast agent having one or more heterocyclic groups.
Type:
Grant
Filed:
June 6, 1995
Date of Patent:
June 18, 1996
Assignee:
Bracco International B.V.
Inventors:
Ramachandran S. Ranganathan, Radhakrishna K. Pillai
Abstract: A method for imaging mammalian tissue utilizing a non-ionic complex of a paramagnetic ion of lanthanide element and a macrocyclic chelating agent.
Type:
Grant
Filed:
December 20, 1994
Date of Patent:
December 12, 1995
Assignee:
Bracco International B.V.
Inventors:
Michael F. Tweedle, Glen T. Gaughan, James J. Hagan
Abstract: Compounds, useful as radiolabeling reagents, including a trihalogenated phenyl ring and having the formula ##STR1## wherein X.sub.1, X.sub.2 and X.sub.3 are halogens, one of which may be a radiohalogen, are disclosed. The invention further includes radiohalogenated proteins as well as processes for preparing such reagents and radiohalogenated proteins.
Type:
Grant
Filed:
August 27, 1992
Date of Patent:
October 31, 1995
Assignee:
Bracco International B.V.
Inventors:
Marc Ogan, Frank P. Tomasella, Jan-I Tu
Abstract: Conductive polymers with ionic conductance including a non-aqueous complex of a polyester having the formula ##STR1## wherein: R.sub.1 and R.sub.2 are a C.sub.1 -C.sub.6 alkylene radical; G is a bivalent group deriving from H --(--O--R.sub.3 --).sub.p --O--R.sub.3 --OH with p=0 or 1-10 and R.sub.3 a C.sub.1 -C.sub.6 alkylene radical; X is CH.sub.2, S or O, and n=5-100; with an ionic compound. The polyesters having formula (I) wherein: X=S; R.sub.1, R.sub.2 and R.sub.3 are each --CH.sub.2 --CH.sub.2 --; p=1-10 and n=5-100, are also new.
Type:
Grant
Filed:
February 17, 1993
Date of Patent:
February 28, 1995
Assignee:
ECP Enichem Polimeri S.r.l.
Inventors:
Piero Manaresi, Anna M. Mastragostino, Antonio Chiolle, Maria C. Bignozzi, Luca Meneghello, Andrea Munari, Francesco Pilati
Abstract: Microbeads of aerogels of one or more oxides are characterised by a high porosity and the fact that at least 90% of the pores present have a diameter lying within a very narrow range. The surface area exceeds 300 m.sup.2 /g and more frequently exceeds 500 m.sup.2 /g, the total pore volume exceeding 1 ml/g.
Abstract: A solid component of catalyst highly active in the (co)polymerization of ethylene containing titanium, magnesium, aluminum, chlorine and alkoxy groups, and obtained by means of a procedure wherein:(i) a solid, granular support of magnesium chloride, obtained by spray-drying an alcohol solution of magnesium chloride, is suspended in a liquid hydrocarbon solvent and an aliphatic alcohol and a titanium tetraalkoxide are added to the suspension thus obtained,(ii) the suspension of step (i) is heated until a homogeneous solution is obtained and the solution is cooled to precipitate a granular solid in a relative suspension,(iii) the granular solid obtained in step (ii), in the relative suspension, is put in contact and reacted with an aluminum alkyl halide, and(iv) the solid component catalyst is recovered from the reaction products of step (iii).
Type:
Grant
Filed:
July 10, 1992
Date of Patent:
January 17, 1995
Assignee:
ECP Enichem Polimeri S.r.l.
Inventors:
Francesco Masi, Renzo Invernizzi, Angelo Moalli, Cesare Ferrero, Francesco Menconi, Lia Barazzoni
Abstract: A Venetian blind having forwardly cantilevered and rearwardly counter-weighted slats, and at least a partially recessed vertical system connected to the slats for raising and lowering the slats independently of their tilted position and for spacing, supporting and tilting the cantilevered slats from an essentially horizontal open viewing position to a forwardly tilted fully sealed position (e.g., full or none), and wherein the vertical system is hidden from view when the slats are in their sealed position, to thereby provide a clean blind appearance. The Venetian blind raises and lowers the blind independently of the position of its tiltable slats and hides the vertical members and cords of the recessed vertical system and their respective slat openings in the slats from view from at least one side, preferably from the room interior, when the slats are in their fully sealed position.
Abstract: A mixed-matrix composite material reinforced with continuous fibre comprising a flexible sheath of thermoplastic polymer covering a multifibre filament impregnated with a powder consisting of:50-99% by weight, and preferably 70-95%, of a thermoplastic polymer;50-1% by weight, and preferably 30-5%, of a C.sub.2 -C.sub.4 olefin/carbon monoxide alternating polymer having an intrinsic viscosity exceeding 0.1 dl/g when measured in m-cresol at 100.degree. C.
Type:
Grant
Filed:
July 30, 1993
Date of Patent:
December 6, 1994
Assignee:
Enichem S.p.A.
Inventors:
Ernesto Occhiello, Giorgio Giannotta, Anna Sommazzi, Massimo Aratti, Fabio Garbassi
Abstract: Polymers having a very good combination of chemical, mechanical and process properties, and particularly useable either alone or as mixtures, as high-tenacity thermoplastic polymer and as elastomers or elastomeric modifiers, contain, randomly distributed along their chain, repeating cycloketonic structural units having the following general formula (I): ##STR1## wherein: A represents a tetravalent aliphatic or cycloaliphatic, substituted or non-substituted moiety containing a total number of from 4 to 50, preferably from 4 to 20, carbon atoms.Such polymers can be prepared by means of a process which comprises reacting, in a liquid media, a polydiene containing adjacent structural units derived from the 1,4-cis polymerization of conjugated dienes, with carbon monoxide, in the presence of free radical generating compounds and, optionally, a compound capable of acting as a hydrogen donor.
Type:
Grant
Filed:
June 3, 1993
Date of Patent:
November 29, 1994
Assignees:
Consiglio Nazionale Delle Ricerche, Enichem S.p.A.
Inventors:
Anna Sommazzi, Nicoletta Cardi, Fabio Garbassi, Chrissostomos Chatgilialoglu
Abstract: A circular knitting machine of elastic needle type provided with a cam for flexing all the needles into their trick before they are raised to seize the feed yarn, in which the selection between those needles to be maintained flexed and those needles to be allowed to return to their normal configuration is made by axially slidable sliders positioned below each needle contained in the tricks.
Abstract: A solid-state sensor device for determining the concentration of gases which can react with hydrogen, in particular oxygen, is disclosed, which is essentially composed of a solid-state protonic conductor put into contact, at one of its sides, with a reference electrode and, at its other side, with a composite electrode (sensor electrode), constituted by a catalytic material into contact with a hydride of a metal or of a metal alloy.
Abstract: A cobalt based catalyst, and the method for preparing it, are disclosed. The catalyst is obtained from the reaction between NaCo(CO).sub.4 and s-trichloro triazine and is advantageously used in the processes of carbonylation of naphthalene mono- and disulfonates in order to yield naphthalene esters and acids.
Type:
Grant
Filed:
December 6, 1993
Date of Patent:
September 6, 1994
Assignee:
Enichem S.p.A.
Inventors:
Giuseppe Cometti, Annick Du Vosel, Franco Francalanci, Roberto Santi
Abstract: The preparation is disclosed of an extruded catalyst based on a silica/alumina gel, which catalyst is particularly active in acid-catalyzed reactions, such as the oligomerization of light olefins, e.g., propylene.
Type:
Grant
Filed:
December 3, 1992
Date of Patent:
August 30, 1994
Assignees:
Eniricerche S.p.A., Euron S.p.A., Snamprogetti, S.p.A.
Inventors:
Stefano Peratello, Carlo Perego, Giuseppe Bellussi
Abstract: A new group of pentaerythryl diphosphonates and poly(pentaerythryl diphosphonates) are described. Flame-retardant compositions are also described, which include a thermoplastic polymer and a certain amount of self-extinguishing agent consisting of one of the above-mentioned pentaerythryl diphosphonates or poly(pentaerythryl diphosphonates).
Type:
Grant
Filed:
November 9, 1993
Date of Patent:
August 16, 1994
Assignee:
Enichem Synthesis, S.p.A.
Inventors:
William Giroldini, Gianluigi Landoni, Antonio Rinaldi, Carlo Neri
Abstract: A catalyst is described for the preparation of isobutene by dehydroisomerization of n-butane consisting of a solid, granular support of porous gamma-alumina on the surface of which catalytic quantities of platinum, silica and preferably also one or more promotors are deposited. In a preferred form of embodiment this catalyst is used with a second catalyst which may be formed of Boralite B or a solid granular support of gamma-alumina on the surface of which catalytic quantities of silica are deposited. The present invention relates also to the process of dehydroisomerization of n-butane to isobutene in which the catalyst is used and the relative operating conditions.