Patent application number | Description | Published |
20090156439 | LUBRICANT COMPOSITIONS COMPRISING COLLOIDAL DISPERSIONS OF IRON AND TREATMENT OF ENGINE EXHAUST GASES THEREWITH - Lubricant compositions contain a blend of a lubricating oil and a colloidal dispersion of particles of at least one iron compound and an amphiphilic agent; such compositions are useful for operating an engine, more particularly a diesel engine, which is equipped with an exhaust system fitted with a particle filter, wherein the particles present in the exhaust gases are trapped on the filter and, periodically, the trapped particles are burned, and further wherein the subject compositions are employed as engine lubricants with a view to catalyzing the combustion of the trapped particles. | 06-18-2009 |
20090220398 | CATALYST COMPOSITIONS FOR THE TREATMENT OF VEHICULAR EXHAUST GASES COMPRISE ZIRCONIUM OXIDE AND CERIUM OXIDE, AND HAVE A HIGH REDUCIBILITY AND A STABLE SPECIFIC SURFACE AREA - Catalyst compositions for the treatment of vehicular exhaust gases are based on zirconium and cerium oxides, have a cerium oxide content of at most 50% by weight, a level of reducibility of at least 95% after calcination in air at 600°, and a specific surface area after calcination for 4 hours at 1100° of at least 15 m | 09-03-2009 |
20090241523 | LUBRICANT COMPOSITIONS COMPRISING COLLOIDAL DISPERSIONS OF RARE EARTH COMPOUNDS AND CATALYTIC COMBUSTION OF ENGINE EXHAUST SOOTS THEREWITH - Engines equipped with an exhaust line fitted with a particulate filter, in which the particulates contained in the exhaust gas are trapped on such filter, and wherein the trapped particulates are periodically burned off, are operated by improvedly catalyzing the combustion of said particles utilizing a composition containing mixture of a lubricating oil and a colloidal dispersion as the engine-lubricating composition, which dispersion includes particles of at least one compound of at least one rare earth and an amphiphilic agent. | 10-01-2009 |
20090274599 | CATALYTIC COMPOSITIONS COMPRISING THE OXIDES OF ZIRCONIUM, CERIUM, YTTRIUM, LANTHANUM AND OTHER RARE EARTHS - Catalytic compositions useful, e.g., for the treatment of internal combustion engine exhaust gases, are based on zirconium oxide in a weight proportion of at least 25%, from 15% to 60% of cerium oxide, from 10% to 25% of yttrium oxide, from 2% to 10% of lanthanum oxide and from 2% to 15% of another rare earth oxide, have a specific surface of at least 15 m | 11-05-2009 |
20100111789 | CATALYST/CATALYST SUPPORT COMPOSITIONS HAVING HIGH REDUCIBILITY AND COMPRISING A NANOMETRIC CERIUM OXIDE DEPOSITED ONTO A SUPPORT SUBSTRATE - Catalyst/catalyst support compositions are characterized by a supported cerium oxide, deposited onto a silica, alumina, titanium or zirconium based support, including particles of said supported oxide deposited onto said support, individualized or in the form of aggregates, no greater than 500 nm in size and having, after 6 hours of calcination at a temperature of at least 800° C., a measured reducibility from 30° C. and 900° C. of at least 80%; such compositions are prepared by combining a colloidal dispersion of the supported oxide and a suspension of the support, drying the resulting mixture by atomization and drying the resulting product by calcination. | 05-06-2010 |
20100247407 | HIGHLY ACIDIC COMPOSITIONS COMPRISING ZIRCONIUM AND SILICON OXIDES AND AN OXIDE OF AT LEAST ONE OTHER ELEMENT SELECTED FROM AMONG TITANIUM, ALUMINUM, TUNGSTEN, MOLYBDENUM, CERIUM, IRON, TIN, ZINC, AND MANGANESE - Compositions useful for treating the exhaust gases of diesel engines contain zirconium oxide, silicon oxide and at least one oxide of at least one element M selected from among titanium, aluminum, tungsten, molybdenum, cerium, iron, tin, zinc, and manganese, in the following mass proportions of these different elements: silicon oxide: 5%-30%; M-element oxide: 1%-20%; the balance being zirconium oxide; such compositions also have an acidity, as measured by the methylbutynol test, of at least 90% and are prepared by placing a zirconium compound, a silicon compound, at least one M-element compound and a basic compound in a liquid medium, thereby generating a precipitate, maturing the precipitate in a liquid medium and separating and calcining the precipitate. | 09-30-2010 |
20100247411 | HIGHLY ACIDIC COMPOSITIONS COMPRISING ZIRCONIUM OXIDE, TITANIUM OXIDE AND TUNGSTEN OXIDE AND TREATMENT OF EXHAUST GASES THEREWITH - Compositions useful for treating exhaust gases contain zirconium, titanium and tungsten oxides, and optionally the oxide of an element M selected from among silicon, aluminum, iron, molybdenum, manganese, zinc, tin, and rare earths in the following mass proportions of these different elements: titanium oxide: 20%-50%; tungsten oxide: 1%-20%, M-element oxide: 1%-20%; the balance being zirconium oxide; such compositions are prepared by placing in a liquid medium a zirconium compound, a titanium compound, optionally an M-element compound and a basic compound, adding a tungsten compound to the precipitate suspension thus obtained and having a pH value ranging from 1 to 7, maturing the suspension resulting from the preceding step, and optionally separating the precipitate and calcining same. | 09-30-2010 |
20110033352 | CATALYST/CATALYST SUPPORT COMPOSITIONS COMPRISING THE OXIDES OF ZIRCONIUM, YTTRIUM AND TUNGSTEN - Compositions based on zirconium oxide, including 1 to 20% yttrium oxide, 1 to 30% tungsten oxide and the balance zirconium oxide, have a specific surface area of at least 40 m | 02-10-2011 |
20110045967 | CATALYST COMPOSITIONS BASED ON NANOPARTICLES OF A ZIRCONIUM OXIDE, A TITANIUM OXIDE OR A MIXED ZIRCONIUM/TITANIUM OXIDE DEPOSITED ONTO A SILICA SUPPORT THEREFOR - 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. | 02-24-2011 |
20110053763 | CATALYST COMPOSITIONS BASED ON NANOPARTICLES OF A ZIRCONIUM OXIDE, A TITANIUM OXIDE OR A MIXED ZIRCONIUM/TITANIUM OXIDE DEPOSITED ONTO AN ALUMINA OR ALUMINUM OXYHYDROXIDE SUPPORT THEREFOR - 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. | 03-03-2011 |
20110230681 | METHOD FOR PRODUCING AMINES - Amine compounds, more particularly diamine compounds, are prepared by hydrogenating compounds including nitrile functions. The preparation can include the use of a hydrogenation catalyst, adapted for the hydrogenation of nitrile compounds into amine compounds, including Raney nickel as well as iron, chromium, and zinc as doping elements. | 09-22-2011 |
20120328500 | HIGHLY ACIDIC COMPOSITIONS COMPRISING ZIRCONIUM AND SILICON OXIDES AND AN OXIDE OF AT LEAST ONE OTHER ELEMENT SELECTED FROM AMONG TITANIUM, ALUMINUM, TUNGSTEN, MOLYBDENUM, CERIUM, IRON, TIN, ZINC, AND MANGANESE - Compositions useful for treating the exhaust gases of diesel engines contain zirconium oxide, silicon oxide and at least one oxide of at least one element M selected from among titanium, aluminum, tungsten, molybdenum, cerium, iron, tin, zinc, and manganese, in the following mass proportions of these different elements: silicon oxide: 5%-30%; M-element oxide: 1%-20%; the balance being zirconium oxide; such compositions also have an acidity, as measured by the methylbutynol test, of at least 90% and are prepared by placing a zirconium compound, a silicon compound, at least one M-element compound and a basic compound in a liquid medium, thereby generating a precipitate, maturing the precipitate in a liquid medium and separating and calcining the precipitate. | 12-27-2012 |