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Inventor: Cuzzato; Paolo
Address: Treviso, IT
No. of patents: 26
Patents:
| Patent Number |
Title Of Patent |
Date Issued |
| 6791001 |
Process to obtain CFC 113a from CFC 113 |
September 14, 2004 |
| A process in gaseous phase to obtain CFC 113a starting from CFC 113, wherein CFC 113, optionally diluted with a gas inert under the reaction conditions, is let flow on a catalyst formed by aluminum fluoride. |
| 6512150 |
Process for purifying pentafluoroethane from chloropentafluoroethane |
January 28, 2003 |
| A gaseous process for reducing the amount of chloropentafluoroethane (CFC 115) impurity present in pentafluoroethane (HFC 125) characterized in that pentafluroethane is allowed to flow on a catalyst formed by a trivalent chromium salt, optionally supported, at temperatures in the range |
| 6479717 |
Process for eliminating chlorine from chlorofluorocarbons |
November 12, 2002 |
| A gaseous process for eliminating chlorine atoms from a chlorofluorocarbon (CFC) of formula C.sub.n F.sub.x Cl.sub.y, wherein n is an integer from 1 to 3 and x+y=2n+2, wherein said compound is reacted with an hydrofluorocarbon of formula C.sub.n' F.sub.x' H.sub.y', wherein n', x', y' |
| 6437200 |
Process for obtaining pentafluoroethane by chlorotetrafluoroethane dismutation |
August 20, 2002 |
| A gaseous process for obtaining pentafluoroethane by dismutation of chlorotetrafluoroethane in the presence of a supported catalyst, said catalyst being formed of a mixture of trivalent chromium oxide with at least an alkaline-earth metal oxide selected from Mg, Ca, Sr and Ba. |
| 6436362 |
Process for preparing aluminum fluoride |
August 20, 2002 |
| Process for preparing aluminum fluoride which comprises fluorination of alumina with gaseous HF, characterized in that the alumina is fluorinated with HF at an initial temperature lower than 300.degree. C., the temperature is raised with a temperature gradient .ltoreq.100.degree. C./ |
| 6348634 |
Process for the (CFC-113a) dimerization |
February 19, 2002 |
| A reductive dimerization process of 1,1,1-trifluoro, 2,2,2-trichloroethane (CFC-113a) with hydrogen, with formation of 1,1,1,4,4,4-hexafluoro-2,2,3,3-tetrachlorobutane and 1,1,1,4,4,4-hexafluoro-2,2-dichlorobutene, and mixtures thereof, wherein the catalyst is constituted by metal ru |
| 6323379 |
Process for obtaining pentafluoroethane by tetrafluorochloroethane dismutation |
November 27, 2001 |
| A process for obtaining pentafluoroethane HFC 125 by dismutation of gaseous tetrafluorochloroethane HCFC 124, at temperatures in the range 200.degree.-300.degree. C., on a trivalent chromium oxide (Cr.sub.2 O.sub.3) catalyst, supported on aluminum fluoride, by feeding HF in such amou |
| 6307114 |
Process for preparing 1,1,1-trifluoro-2-chloroethane |
October 23, 2001 |
| In the preparation of 1,1,1-trifluoro-2-chloroethane (HCFC 133a) by means of hydrofluorination in the gas phase of trichloroethylene (TCE) in the presence of a carried catalyst based on Cr.sub.2 O.sub.3 it is possible to prolong the catalyst life by feeding to the hydrofluorination react |
| 6300529 |
Process for preparing HCFC-123 |
October 9, 2001 |
| Process for preparing HCFC-123 with a content of olefins lower than 10 ppm and very small amounts of HCFC-123a and 123b by dismutation of HCFC-124 in gaseous phase by contact with a catalyst which essentially consists of three valence chromium oxide supported on aluminum fluoride, at |
| 6232514 |
Process for preparing pentafluoroethane |
May 15, 2001 |
| Process for preparing pentafluoroethane (HFC-125) wherein 1,1,1-trifluorodichloroethane (HFC-123) is reacted with HF at a temperature from 310.degree. to 380.degree. C., in the presence of a catalyst comprising Cr.sub.2 O.sub.3 supported on preformed AlF.sub.3. HFC-125 is obtained wi |
| 6187975 |
Preparation process of 227 |
February 13, 2001 |
| Perfluoropropene (PFP) hydrofluorination process in gaseous phase to obtain CF.sub.3 --CHF--CF.sub.3 (A-227ea), characterized in that as catalyst fluorinated alumina containing at least 90% by weight of AlF.sub.3, is used, the HF/PFP molar ratios range from about 4:1 to 20:1, the hyd |
| 6187280 |
Process for the preparation of aluminum fluoride |
February 13, 2001 |
| Process for preparing aluminum fluoride having an high surface area and high pore volume comprising the fluorination with HF of alumina having surface area of at least 150 m.sup.2 /g and pore volume not lower than 0.3 cc/g, said alumina comprising from about 0.5 up to about 15% by weight |
| 6150572 |
Process for the regeneration of a catalyst based on trivalent chromium compounds |
November 21, 2000 |
| Process for the regeneration of a fluorination catalyst based on Cr(III) compounds optionallay supported comprising a) the treatment at 350.degree. C.-400.degree. C. with an air/inert gas mixture and b) treatment at 300.degree. C.-380.degree. C. with a mixture of an inert gas containing |
| 6037508 |
Process for preparing 1,1,1,2-tetrafluoroethane |
March 14, 2000 |
| 1,1,1,2-tetrafluoroethane (134a) is prepared by reacting, in the gas phase, trichloroethylene with 1,1,1-trifluorochloroethane (133a) and hydrofluoric acid with trichloroethylene/133a molar ratios ranging from 5/95 to 50/50, in the presence of a catalyst consisting of Cr.sub.2 O.sub.3 ca |
| 5981813 |
Fluorination process of halogenated organic compounds |
November 9, 1999 |
| Fluorination process of halogenated organic compounds with gaseous anhydrous HF characterized in that a catalyst comprising a supported Cr(III) amorphous compound is used, wherein the support consists in an aluminum trifluoride (AlF.sub.3) having an high surface area and an high pore |
| 5919728 |
Catalyst for the fluorination of halogenated hydrocarbons |
July 6, 1999 |
| A fluorination catalyst based on of an amorphous Cr (III) compound and on a compound of another metal selected from Mg, Ca, Sr, Ba, Sc, Ti and Zr, wherein the atomic ratio of Cr/other metal is between 50:1 and 1:1, said compounds are supported on a AlF.sub.3 support and being prepared by |
| 5880316 |
Process for preparing 1,1,1,2-tetrafluoroethane |
March 9, 1999 |
| 1,1,1,2-tetrafluoroethane (134a) is prepared by reacting, in the gas phase, trichloroethylene with 1,1,1-trifluorochloroethane (133a) and hydrofluoric acid with trichloroethylene/133a molar ratios ranging from 5/95 to 50/50, in the presence of a catalyst consisting of Cr.sub.2 O.sub.3 ca |
| 5841006 |
Process for preparing pentafluoroethane |
November 24, 1998 |
| Process for preparing pentafluoroethane (125) containing amounts of 115 lower than 0.02% by weight wherein pentafluoroethane is obtained by a dismutation process of tetrafluorochloroethane CF.sub.3 CHClF (HCFC-124) in gaseous phase in the presence of a chrome oxide catalyst (CR.sub.2 |
| 5817895 |
Process for the regeneration of a catalyst based on trivalent chromium compounds |
October 6, 1998 |
| Process for the regeneration of a fluorination catalyst based on Cr(III) compounds optionally supported, which comprise a) treatment at 350.degree.-40.degree. C. with an air/inert gas mixture and b) treatment at 300.degree.-380.degree. C. with a mixture of an inert gas containing fro |
| 5608125 |
Process for preparing 1,1,1,2-tetrafluoroethane |
March 4, 1997 |
| 1,1,1,2-tetrafluoroethane (134a) is prepared by reacting, in the gas phase, trichloroethylene with 1,1,1-trifluorochloroethane (133a) and hydrofluoric acid with trichloroethylene/133a molar ratios ranging from 5/95 to 50/50, in the presence of a catalyst consisting of Cr.sub.2 O.sub.3 ca |
| 5600037 |
Process for isomerizing 1,1,2-trifluoro-1,2-dichloroethane to 1,1,1-trifluoro-2,2-dichloroethane |
February 4, 1997 |
| 1,1,2-trifluoro-1,2-dichloroethane (Al23a) is isomerized to 1,1,1-tri-fluoro-2,2-dichloroethane (Al23) by contacting it with AlF.sub.3 at temperatures ranging from 180.degree. to 400.degree. C. Advantageously, it is operated with mixtures of Al23a with Al23 and/or other chlorofluoroc |
| 5563305 |
Process for purifying 1,1,1-trifluoro-2-fluoroethane |
October 8, 1996 |
| 1,1,1-trifluoro-2-fluoroethane (CFC 134a) is purified from 1,1-difluoro-2-chloroethylene (CFC 1122) by reacting a mixture comprising said compounds with hydrofluoric acid, at temperatures from 200.degree. C. to 450.degree. C., in one presence of chrome oxide (Cr.sub.2 O.sub.3) in sub |
| 5475168 |
Process for purifying 1,1,1-trifluoro-2-fluoroethane |
December 12, 1995 |
| 1,1,1-trifluoro-2-fluoroethane (CFC 134a) is purified from 1,1-difluoro-2-chloroethylene (CFC 1122) by reacting a mixture comprising said compounds with hydrofluoric acid, at temperatures from 200.degree. C. to 450.degree. C., in the presence of chrome oxide (Cr.sub.2 O.sub.3) in sub |
| 5463151 |
Process for preparing 1,1,1,2-tetrafluoroethane |
October 31, 1995 |
| 1,1,1,2-tetrafluoroethane (134a) is prepared by reacting, in the gas phase, trichloroethylene with 1,1,1-trifluorochloroethane (133a) and hydrofluoric acid with trichloroethylene/133a molar ratios ranging from 5/95 to 50/50, in the presence of a catalyst consisting of Cr.sub.2 O.sub.3 ca |
| 5414167 |
Process for purifying 1,1,1-trifluoro-2,2-dichloroethane from isomer 1,1,2-trifluoro-1,2-dichlor |
May 9, 1995 |
| The 1,1,2-trifluoro-1,2-dichloroethane content is reduced or removed from 1,1,1-trifluoro-2,2-dichloroethane by contacting a gaseous mixture comprising said compounds with chrome oxide (Cr.sub.2 O.sub.3) either as such or supported, at temperatures from 180.degree. to 400.degree. C. |
| 5345014 |
Process for preparing pentafluoroethane by dismutation of tetrafluorochloroethane |
September 6, 1994 |
| Pentafluoroethane (HFC 125) is selectively prepared by dismutation of tetrafluorochloroethane (HCFC 124) effected by contacting the latter, in the gas phase, with a Cr.sub.2 O.sub.3 catalyst at temperatures ranging from 150.degree. to 330.degree. C. Along with HFC 125, also HCFC 123 |
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