Patents by Inventor Simon Ifrah

Simon Ifrah 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).

  • Publication number: 20140205522
    Abstract: The composition of the invention is based on oxides of cerium, of zirconium and of at least one rare earth metal other than cerium, with a cerium oxide content of greater than 50% by weight and it has, after calcination at 1000° C. for 4 hours, a specific surface area of at least 20 m2/g and an amount of mobile oxygen between 200° C. and 400° C. of at least 0.8 ml O2/g. It is prepared by a process in which, in a reactor, a mixture of compounds of cerium, of zirconium and of the other rare earth metal is reacted continuously with a basic compound with a residence time of the reaction medium in the mixing zone of the reactor of at most 100 milliseconds; the precipitate is heated then brought into contact with a surfactant before being calcine.
    Type: Application
    Filed: June 13, 2012
    Publication date: July 24, 2014
    Applicant: RHODIA OPERATIONS
    Inventors: Simon Ifrah, Emmanuel Rohart, Julien Hernandez, Dominique Horbez, Lama Itani
  • Publication number: 20140147357
    Abstract: The invention relates to a composition essentially consisting of a zirconia-ceria mixed oxide, with a zirconia content of at least 40 wt. % and, after 4 hours of calcination at 1000° C., a specific surface area of at least 25 m2/g and a quantity of mobile oxygen between 200° C. and 400° C. of at least 0.5 ml O2/g. Said composition is produced using a method wherein a mixture of cerium and zirconium compounds is continuously reacted with a basic compound in a reactor, with a maximum residence time of the reactive medium in the mixture zone of the reactor of 100 milliseconds; and the precipitate is heated then brought into contact with a surfactant before being calcinated.
    Type: Application
    Filed: June 25, 2012
    Publication date: May 29, 2014
    Applicant: Rhodia Operations
    Inventors: Simon Ifrah, Lama Itani, Julien Hernandez, Dominique Horbez
  • Publication number: 20140140910
    Abstract: The invention relates to a composition essentially consisting of ceria-zirconia mixed oxide, with a ceria content of at least 60 wt. % and, after 4 hours of calcination at 1000° C., a specific surface area of at least 15 m2/g and a quantity of mobile oxygen between 200° C. and 400° C. of at least 0.7 ml 02/g. Said composition is produced using a method wherein a mixture of cerium and zirconium compounds is continuously reacted with a basic compound in a reactor, with a maximum residence time of the reactive medium in the mixture zone of the reactor of 100 milliseconds; and the precipitate is heated then brought into contact with a surfactant before being calcinated.
    Type: Application
    Filed: June 25, 2012
    Publication date: May 22, 2014
    Applicant: RHODIA OPERATIONS
    Inventors: Simon Ifrah, Lama Itani, Julien Hernandez, Dominique Horbez
  • Publication number: 20140072492
    Abstract: A composition of zirconium oxide and at least one oxide of a rare earth other than cerium is described. The zirconium oxide has a weight proportion of at least 50% and, after calcination at a temperature of 900° C. for 4 hours, the composition exhibits two populations of pores of which their respective diameters are centered. The diameter of the first pore has a value of from 20 nm to 40 nm and in the second pore has a value of from 80 nm to 200 nm. Further described is how the composition can be used for treating the exhaust gases of internal combustion engines.
    Type: Application
    Filed: November 21, 2011
    Publication date: March 13, 2014
    Applicant: RHODIA OPERATIONS
    Inventors: Simon Ifrah, Olivier Larcher
  • Publication number: 20140044628
    Abstract: The composition according to the invention is based on zirconium oxide, cerium oxide and at least one oxide of a rare earth other than cerium, in a proportion, by weight, of zirconium oxide of at least 5% and of cerium oxide of at most 90%, and it is characterized in that it additionally comprises silicon oxide in an amount, by weight, of between 0.1% and 2%. This composition may be used in catalysis, in particular in systems for treating the exhaust gases of internal combustion engines.
    Type: Application
    Filed: April 4, 2012
    Publication date: February 13, 2014
    Applicant: RHODIA OPERATIONS
    Inventor: Simon Ifrah
  • Patent number: 8623778
    Abstract: Catalyst compositions include finely divided nanoscale particles of at least one supported oxide selected from among zirconium oxide, titanium oxide or a mixed zirconium/titanium oxide deposited onto an alumina-based or aluminum-oxyhydroxide-based support, wherein, after calcination for 4 hours at 900° C., the at least one support oxide is in the form of nanoscale particles deposited onto the support, the size of said particles being at most 10 nm when the at least one supported oxide is based is zirconium oxide and being at most 15 nm when the at least one supported oxide is titanium oxide or a mixed zirconium/titanium oxide; such catalyst compositions are especially useful for the selective reduction of NOx.
    Type: Grant
    Filed: February 23, 2009
    Date of Patent: January 7, 2014
    Assignee: Rhodia Operations
    Inventors: Stephan Verdier, Guillaume Criniere, Simon Ifrah, Rui Jorge Coelho Marques
  • Patent number: 8563462
    Abstract: Catalyst compositions include finely divided nanoscale particles of at least one supported oxide, based on a zirconium oxide, a titanium oxide or a mixed zirconium/titanium oxide deposited onto a silica based support, wherein, after calcination for 4 hours at 900° C., the supported oxide is in the form of nanoscale particles deposited onto the support, the size of the particles being at most 5 nm when the at least one supported oxide is based on a zirconium oxide, being at most 10 nm when the at least one supported oxide is based on a titanium oxide and being at most 8 nm when the at least one supported oxide is based on a mixed zirconium/titanium oxide; such catalyst compositions are especially useful for the selective reduction of NOx.
    Type: Grant
    Filed: February 23, 2009
    Date of Patent: October 22, 2013
    Assignee: Rhodia Operations
    Inventors: Stephan Verdier, Guillaume Criniere, Simon Ifrah, Rui Jorge Coelho Marques
  • Patent number: 8524183
    Abstract: A composition is described that includes oxides of zirconium, cerium and another rare earth different from cerium, having a cerium oxide content not exceeding 50 wt % and, after calcination at 1000° C. for 6 hours, a maximal reducibility temperature not exceeding 500° C. and a specific surface of at least 45 m2/g. The composition can be prepared according to a method that includes continuously reacting a mixture that includes compounds of zirconium, cerium and another rare earth having a basic compound for a residence time not exceeding 100 milliseconds, wherein the precipitate is heated and contacted with a surfactant before calcination.
    Type: Grant
    Filed: January 10, 2011
    Date of Patent: September 3, 2013
    Assignee: Rhodia Operations
    Inventors: Simon Ifrah, Emmanuel Rohart, Julien Hernandez, Stéphane Denaire
  • Publication number: 20130142713
    Abstract: A composition is described that includes zirconium oxide, cerium oxide and yttrium oxide, or zirconium oxide, cerium oxide and at least two oxides of two rare earths different from cerium in a mass proportion of at least 20% of zirconium oxide and of at most 70% of cerium oxide, wherein the composition further includes, after calcination at 900° C. for 4 hours, two populations of pores having respective diameters centered, for the first population, about a value of 20 nm to 40 nm and, for the second, about a value of 80 nm to 200 nm. The composition can be used for processing exhaust gases of internal combustion engines.
    Type: Application
    Filed: May 2, 2011
    Publication date: June 6, 2013
    Applicant: RHODIA OPERATIONS
    Inventors: Simon Ifrah, Olivier Larcher
  • Publication number: 20130052108
    Abstract: A composition is described that includes oxides of zirconium, cerium and another rare earth different from cerium, having a cerium oxide content not exceeding 50 wt % and, after calcination at 1000° C. for 6 hours, a maximal reducibility temperature not exceeding 500° C. and a specific surface of at least 45 m2/g. The composition can be prepared according to a method that includes continuously reacting a mixture that includes compounds of zirconium, cerium and another rare earth having a basic compound for a residence time not exceeding 100 milliseconds, wherein the precipitate is heated and contacted with a surfactant before calcination.
    Type: Application
    Filed: January 10, 2011
    Publication date: February 28, 2013
    Applicant: RHODIA OPERATIONS
    Inventors: Simon Ifrah, Emmanuel Rohart, Julien Hernandez, Stéphane Denaire
  • Publication number: 20120189517
    Abstract: A composition including cerium and zirconium oxides, including at least 30 wt.-% cerium oxide is desired. Following calcination at a temperature of 900 DEG C. for 4 hours, the composition has two populations of pores, the diameters of the first population being centered around a value of between 5 nm and 15 nm for a composition including 30% to 65% cerium oxide or between 10 nm and 20 nm for more than 65% cerium oxide and the diameter of the second population being centered around a value of between 45 nm and 65 nm for 30% to 65% cerium oxide or between 60 nm and 100 nm for more than 65% cerium oxide.
    Type: Application
    Filed: July 2, 2010
    Publication date: July 26, 2012
    Applicant: RHODIA OPERATIONS
    Inventors: Simon Ifrah, Olivier Larcher
  • Publication number: 20120129690
    Abstract: A porous inorganic composite oxide containing oxides of aluminum and of cerium and/or zirconium, and, optionally, oxides of one or more dopants selected from transition metals, rare earths, and mixtures thereof, and having a specific surface area, in m2/g, after calcining at 1100° C. for 5 hours, of ?0.8235[Al]+11.157 and a total pore volume, in cm3/g, after calcining at 900° C. for 2 hours, of ?0.0097[Al]+0.0647, wherein [Al] is the amount of oxides of aluminum, expressed as pbw Al2O3 per 100 pbw of the composite oxide; a catalyst containing one or more noble metals dispersed on the porous inorganic composite oxide; and a method for making the porous inorganic composite oxide.
    Type: Application
    Filed: November 16, 2011
    Publication date: May 24, 2012
    Applicant: RHODIA OPERATIONS
    Inventors: Olivier Larcher, Francis Francis, Thomas English, Simon Ifrah, Andrew Polli
  • Publication number: 20120046163
    Abstract: A composition is described that includes a perovskite of the formula LaMO3, where M is at least one element selected from among iron, aluminium or manganese, in the form of particles dispersed on an alumina or aluminium oxyhydroxide substrate, wherein after calcination at 700° C. for 4 hours, the perovskite is in the form of a pure crystallographic phase, and in that the size of the perovskite particles does not exceed 15 nm. The described composition can be used in the field of catalysis.
    Type: Application
    Filed: February 25, 2010
    Publication date: February 23, 2012
    Applicant: RHODIA OPERATIONS
    Inventors: Simon Ifrah, Olivier L'archer, Rui Jorge Coelho Marques, Michael Lallemand, Julien Hernandez
  • Publication number: 20110206583
    Abstract: Catalyst compositions useful for the conversion of vehicular exhaust gases contain zirconium, cerium and yttrium oxides with a cerium oxide proportion of from 3% to 15%, and yttrium oxide proportions corresponding to the following conditions: 6% at most if the cerium oxide proportion is from 12% excluded and 15% included; 10% at most if the cerium oxide proportion is from 7% excluded and 12% included; 30% at most if the cerium oxide proportion is from 3% to 7% included, the balance being zirconium oxide; such compositions may optionally include an oxide of a rare earth selected from among lanthanum, neodymium and praseodymium.
    Type: Application
    Filed: April 21, 2009
    Publication date: August 25, 2011
    Applicant: RHODIA OPERATIONS
    Inventors: Olivier Larcher, Emmanuel Rohart, Simon Ifrah
  • Publication number: 20110053763
    Abstract: Catalyst compositions include finely divided nanoscale particles of at least one supported oxide selected from among zirconium oxide, titanium oxide or a mixed zirconium/titanium oxide deposited onto an alumina-based or aluminum-oxyhydroxide-based support, wherein, after calcination for 4 hours at 900° C., the at least one support oxide is in the form of nanoscale particles deposited onto the support, the size of said particles being at most 10 nm when the at least one supported oxide is based is zirconium oxide and being at most 15 nm when the at least one supported oxide is titanium oxide or a mixed zirconium/titanium oxide; such catalyst compositions are especially useful for the selective reduction of NOx.
    Type: Application
    Filed: February 23, 2009
    Publication date: March 3, 2011
    Applicant: RHODIA OPERATIONS
    Inventors: Stephan Verdier, Guillaume Criniere, Simon Ifrah, Rui Jorge Coelho Marques
  • Publication number: 20110045967
    Abstract: Catalyst compositions include finely divided nanoscale particles of at least one supported oxide, based on a zirconium oxide, a titanium oxide or a mixed zirconium/titanium oxide deposited onto a silica based support, wherein, after calcination for 4 hours at 900° C., the at least one supported oxide is in the form of nanoscale particles deposited onto the support, the size of the particles being at most 5 nm when the at least one supported oxide is based on a zirconium oxide, being at most 10 nm when the at least one supported oxide is based on a titanium oxide and being at most 8 nm when the at least one supported oxide is based on a mixed zirconium/titanium oxide; such catalyst compositions are especially useful for the selective reduction of NOx.
    Type: Application
    Filed: February 23, 2009
    Publication date: February 24, 2011
    Inventors: Stephan Verdier, Guillaume Criniere, Simon Ifrah, Rui Jorge Coelho Marques