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Inventor: Chopin; Thierry
Address: Saint Denis, FR
No. of patents: 22
Patents:
| Patent Number |
Title Of Patent |
Date Issued |
| 6284033 |
Inorganic rare earth pigments/colorants and synthesis/applications thereof |
September 4, 2001 |
| Thermally/chemically stable and nontoxic inorganic pigments/colorants, characteristically green and well suited for the coloration of a wide variety of materials and substrates, for example, plastics, ceramics, etc., comprise at least one mixed oxide of the formula:in which R is at least |
| 5718879 |
Lanthanum-stabilized alumina particulates |
February 17, 1998 |
| Heat-stable alumina particulates well suited as catalysts/catalyst supports, notably for the catalytic conversion of vehicular exhaust gases, contain a stabilizing amount of lanthanum values, optionally a costabilizing amount of neodymium values, and have a specific surface area of g |
| 5712218 |
Cerium/zirconium mixed oxide catalysts having high/stable specific surface areas |
January 27, 1998 |
| Cerium/zirconium mixed oxides (optionally including yttrium values), comprising solid solutions thereof, having contents of zirconium of up to 60 atom % and having thermally stable, very high specific surface areas at least greater than 80 m.sup.2 /g, preferably at least 100 m.sup.2 /g a |
| 5693299 |
Process for the catalytic conversion of exhaust gases using cerium/zirconium mixed oxide catalys |
December 2, 1997 |
| Cerium/zirconium mixed oxides (optionally including yttrium values), comprising solid solutions thereof, having contents of zirconium of up to 60 atom % and having thermally stable, very high specific surface areas at least greater than 80 m.sup.2 /g, preferably at least 100 m.sup.2 /g a |
| 5637547 |
Crush resistant adsorptive agglomerates of activated alumina |
June 10, 1997 |
| Activated alumina agglomerates having a crush resistance of at least 12 daN, measured on that fraction thereof having a mean diameter ranging from 3 to 4 mm, and an adsorptive capacity greater than 18% by weight, well adopted as adsorbents in a wide variety of purification processes, are |
| 5626826 |
Zirconium/cerium mixed oxide catalyst/catalyst support compositions having high/stable specific |
May 6, 1997 |
| Zirconium/cerium mixed oxides (optionally including thermally stabilizing dopant values), comprising solid solutions thereof, having contents of zirconium of up to 99% by weight, and having high specific surface areas, are well suited as catalysts and/or catalyst supports, notably for th |
| 5607892 |
Zirconium/cerium mixed oxide catalyst/catalyst support compositions having high/stable specific |
March 4, 1997 |
| Zirconium/cerium mixed oxides (optionally including thermally stabilizing dopant values), comprising solid solutions thereof, having contents of zirconium of up to 99% by weight, and having high specific surface areas, are well suited as catalysts and/or catalyst supports, notably for th |
| 5532198 |
Zirconium/cerium mixed oxide catalyst/catalyst support compositions having high/stable specific |
July 2, 1996 |
| Zirconium/cerium mixed oxides (optionally including thermally stabilizing dopant values), comprising solid solutions thereof, having contents of zirconium of up to 99% by weight, and having high specific surface areas, are well suited as catalysts and/or catalyst supports, notably for th |
| 5529969 |
B.E.T. specific surface-stabilized ceria |
June 25, 1996 |
| Ceric oxide (ceria) particulates exhibiting a particularly small crystallite size, well suited for catalyst/catalyst carrier applications, include a specific surface-stabilizing amount of silicon values (preferably less than 1% by weight thereof, expressed as SiO.sub.2) and have a sp |
| 5401309 |
Rare earth metal sulfide pigment compositions |
March 28, 1995 |
| Novel colorant/pigment compositions, prepared via precipitation technique and well suited for the coloration of a wide variety of materials and substrates, e.g., plastics, paints and inks, ceramics, cosmetics, etc., comprise composite core/sheath particulates, the cores of which comprisi |
| 5352646 |
Supported catalysts |
October 4, 1994 |
| Novel supported catalysts, well adapted for the catalytic conversion of exhaust gases emanating from internal combustion engines, include a porous carrier material, e.g., alumina spheres, such porous carrier material having a catalytically effective amount of at least one non-platinum gr |
| 5348581 |
Rare earth sesquisulfide compositions comprising alkali/alkaline earth metal values |
September 20, 1994 |
| Unique compositions based on at least one crystalline rare earth sesquisulfide, well suited for the coloration of a wide variety of substrates, e.g., cosmetics, plastics, paints and rubbers, contain a dopant amount of at least one alkali/alkaline earth metal, at least a fraction of w |
| 5278123 |
Monolithic catalysts for converting sulfur compounds into SO2 |
January 11, 1994 |
| Monolithic catalyst shaped articles adopted for the catalytic oxidation conversion of compounds of sulfur, e.g., HS, into sulfur dioxide, include a monolithic substrate containing a catalytically effective amount of at least one catalytically active element for oxidatively converting suc |
| 5273949 |
Silica-stabilized alumina |
December 28, 1993 |
| Thermally stable alumina having a high specific surface at elevated temperatures, well suited as a catalyst support material, e.g., as the support substrate of catalysts useful for the conversion of exhaust gases emanating from internal combustion engines, contain an effective heat s |
| 5232889 |
Supported catalysts |
August 3, 1993 |
| Novel supported catalysts, well adapted for the catalytic conversion of exhaust gases emanating from internal combustion engines, include a porous carrier material, e.g., alumina spheres, such porous carrier material having a catalytically effective amount of at least one non-platinum gr |
| 5210063 |
Crush-resistant/adsorptive agglomerates of activated alumina |
May 11, 1993 |
| Activated alumina agglomerates having a crush resistance of at least 12 daN, measured on that fraction thereof having a mean diameter ranging from 3 to 4 mm, and an adsorptive capacity greater than 18% by weight, well adopted as adsorbents in a wide variety of purification processes, are |
| 5149519 |
Preparation of sulfur-free titanium dioxide |
September 22, 1992 |
| Sulfur-free anatase titanium dioxide, readily dispersible in aqueous media and well adopted for the production of electronic-grade alkaline earth metal titanates, e.g., barium and strontium titanates, is prepared by hydrolyzing a sulfur-free compound of titanium in the presence of (i) at |
| 5106607 |
Multilobar catalysts for the conversion of sulfur containing gaseous effluents |
April 21, 1992 |
| Multilobar shaped catalyst particulates, e.g., tri- or quadrilobar particulates, well adapted for the catalytic conversion of gases containing compounds of sulfur, e.g. SO.sub.2, H.sub.2 S, COS and/or CS.sub.2, by the Claus reaction and/or by hydrolysis, are comprised of a catalytica |
| 5100858 |
Moldable/extrudable titanium dioxide particulates |
March 31, 1992 |
| Poorly crystallized or amorphous TiO.sub.2 particulates having a mean particle size greater than 20 nm are prepared by thermally hydrolyzing a titanium compound in solution, in the presence of at least one carboxylic acid containing a hydroxyl and/or amino group, or an organophosphoric |
| 5045301 |
Moldable/extrudable titanium dioxide particulates |
September 3, 1991 |
| Poorly crystallized or amorphous TiO.sub.2 particulates having a mean particle size greater than 20 nm are prepared by thermally hydrolyzing a titanium compound in solution, in the presence of at least one carboxylic acid containing a hydroxyl and/or amino group, or an organophosphoric |
| 4983563 |
Mechanically improved shaped articles |
January 8, 1991 |
| Shaped articles having improved mechanical properties, e.g., stronger catalysts and catalyst supports, are produced by shaping a mass of particulate material, e.g., ceramic powder, into the form of the desired final article, the particulate material including a microbially produced p |
| 4891350 |
Catalyst supports and process for their preparation |
January 2, 1990 |
| Monolithic catalyst substrates are more adherently coated with at least one oxide layer, by including in the coating composition a gum or biogum, preferably xanthan gum. |
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