公开(公告)号：DE69625237C5

公开(公告)日：2020-04-23

申请号：DE69625237

申请日：1996-06-28

Applicant: RHODIA CHIMIE SA

Inventor： AUBERT MARYLINE ,  BIRCHEM THIERRY ,  BLANCHARD GILBERT ,  TOURET OLIVIER

IPC: C01G25/00 ,  B01D53/94 ,  B01J23/10 ,  B01J35/10 ,  B01J37/03 ,  B01J37/04 ,  C01G25/02

Abstract: Composition à base d'oxyde de zirconium comprenant de l'oxyde de cerium et au moins un element dopant, caractérisée en ce qu'apres calcination 6 heures à 1000°C, elle possede une surface specifique entre 25 m/g et 51 m/g et elle se présente sous la forme d'une solution solide pure de l'oxyde de cerium et du dopant dans l'oxyde de zirconium.

公开(公告)号：ES2193219T3

公开(公告)日：2003-11-01

申请号：ES96115536

申请日：1992-10-28

Applicant: RHODIA CHIMIE SA

Inventor： CHOPIN THIERRY ,  TOURET OLIVIER ,  GUICHON HERVE

IPC: A61K8/30 ,  A61K8/19 ,  A61K8/23 ,  A61Q1/02 ,  C01F17/00 ,  C08K3/30 ,  C09C1/00 ,  C09C3/06 ,  C09D7/12 ,  D06P1/00 ,  C08K3/22

Abstract: A rare earth sesquisulphide of formula M2S3 has an interstitial structure (in which M is an element from the lanthanide gp. or yttrium, and contg. an alkaline earth element as a dopant). At least part of the latter is included in the crystal lattice of the sulphide, and the material is in the form of a powder of average particle size 0.2-5 microns. Also claimed are their prepn..

公开(公告)号：ES2188767T3

公开(公告)日：2003-07-01

申请号：ES96924030

申请日：1996-06-28

Applicant: RHODIA CHIMIE SA

Inventor： AUBERT MARYLINE ,  BIRCHEM THIERRY ,  BLANCHARD GILBERT ,  TOURET OLIVIER

IPC: B01D53/94 ,  B01J23/10 ,  B01J35/10 ,  B01J37/03 ,  B01J37/04 ,  C01G25/00 ,  C01G25/02

Abstract: The invention relates to a composition based on zirconium oxide and comprising cerium oxide which has a specific surface of at least 30 m2/g after calcination for 6 hours at 900° C. and which is provided in the form of a pure solid solution of cerium oxide in zirconium oxide. According to another embodiment, this composition can additionally comprise a doping element and can exhibit a specific surface of at least 25 m2g after calcination for 6 hours at 1000° C. A process for the preparation of these compositions comprises the following stages:a mixture is prepared, in liquid medium, containing a zirconium compound and a cerium(IV) compound;the said mixture is heated at a temperature greater than 100° C.;the reaction mixture obtained on conclusion of the heating is brought to a basic pH;the precipitate thus obtained is recovered;the said precipitate is calcined;the doping element being, if appropriate, added either to the starting mixture in liquid medium or to the reaction mixture obtained on conclusion of the heating.

公开(公告)号：ES2133372T3

公开(公告)日：1999-09-16

申请号：ES93403030

申请日：1993-12-15

Applicant: RHODIA CHIMIE SA

Inventor： CHOPIN THIERRY ,  TOURET OLIVIER

IPC: B01J35/10 ,  B01D53/86 ,  B01D53/94 ,  B01J23/10 ,  C01G25/00 ,  C01G25/02

Abstract: The invention relates to new compositions based on a mixed cerium and zirconium oxide (solid solutions) having very high specific surfaces, that is to say at least greater than 80 m /g and preferably of at least 100 m /g or even 150m /g, the said surfaces moreover being thermally stable. The amounts of zirconium in solid solution in the cerium oxide can be very large, for example between 1 and 60 atom %. They are obtained according to a process consisting in heating an aqueous mixture containing, in the required stoichiometric proportions, a soluble cerium compound, such as ceric nitrate, and a soluble zirconium compound, such as zirconyl nitrate, in recovering, especially by filtration, the reaction product thus formed and then finally, optionally, in calcining this product. The compositions according to the invention can be used as catalysts and/or catalyst supports (substrates), in particular in the field of automobile afterburning.

公开(公告)号：NO982295L

公开(公告)日：1998-07-21

申请号：NO982295

申请日：1998-05-20

Applicant: RHODIA CHIMIE SA

Inventor： BIRCHEM THIERRY ,  MACAUDIERE PIERRE ,  TOURET OLIVIER

IPC: B01J13/00 ,  B01J23/10 ,  B01J23/76 ,  C01F17/00 ,  C01G3/00 ,  C01G25/00 ,  C01G45/00 ,  C01G49/00 ,  C10L1/10 ,  C10L1/30 ,  C10L10/02 ,  C10L10/06

Abstract: PCT No. PCT/FR96/01852 Sec. 371 Date Nov. 19, 1998 Sec. 102(e) Date Nov. 19, 1998 PCT Filed Nov. 22, 1996 PCT Pub. No. WO97/19022 PCT Pub. Date May 29, 1997A method for processing soot containing one or more rare earths, wherein said soot is contacted with an oxygen-containing gas, is disclosed. The method comprises (a) preparing an aqueous phase comprising a dispersion of at least one oxygenated metal compound; (b) simultaneously or consecutively contacting a suspension from step (a) with an organic phase including at least one amphiphilic agent and preferably an organic mixture or compound as the solvent; and +E,crc c+EE recovering the organic phase. Said oxygenated metal compound is produced by means of a method according to which a solution including at least one soluble rare-earth salt, usually an acetate and/or a chloride, is prepared; the solution is contacted with a basic medium and the resulting reaction mixture is maintained at a basic pH; and the precipitate formed by atomization or freeze-drying is recovered. Said method is useful in inorganic synthesis and catalysis.

公开(公告)号：DE69324785C5

公开(公告)日：2019-10-31

申请号：DE69324785

申请日：1993-12-15

Applicant: RHODIA CHIMIE SA

Inventor： CHOPIN THIERRY ,  TOURET OLIVIER

IPC: B01J35/10 ,  C01G25/00 ,  B01D53/86 ,  B01D53/94 ,  B01J23/10 ,  C01G25/02

Abstract: Composition à base d'un oxyde mixte de cérium et de zirconium, caractérisée en ce qu'elle se présente sous la forme d'une phase cristalline cubique unique d'oxyde cerique, le zirconium étant en solution solide dans l'oxyde de cerium, et en ce qu'elle presente une surface specifique apres calcination à 800°C pendant 6 heures entre 30 m/g et 57 m/g.

公开(公告)号：AT238239T

公开(公告)日：2003-05-15

申请号：AT96939967

申请日：1996-11-22

Applicant: RHODIA CHIMIE SA

Inventor： BIRCHEM THIERRY ,  MACAUDIERE PIERRE ,  TOURET OLIVIER

IPC: B01J13/00 ,  B01J23/10 ,  B01J23/76 ,  C01F17/00 ,  C01G3/00 ,  C01G25/00 ,  C01G45/00 ,  C01G49/00 ,  C10L1/10 ,  C10L1/30 ,  C10L10/02 ,  C10L10/06

Abstract: PCT No. PCT/FR96/01852 Sec. 371 Date Nov. 19, 1998 Sec. 102(e) Date Nov. 19, 1998 PCT Filed Nov. 22, 1996 PCT Pub. No. WO97/19022 PCT Pub. Date May 29, 1997A method for processing soot containing one or more rare earths, wherein said soot is contacted with an oxygen-containing gas, is disclosed. The method comprises (a) preparing an aqueous phase comprising a dispersion of at least one oxygenated metal compound; (b) simultaneously or consecutively contacting a suspension from step (a) with an organic phase including at least one amphiphilic agent and preferably an organic mixture or compound as the solvent; and +E,crc c+EE recovering the organic phase. Said oxygenated metal compound is produced by means of a method according to which a solution including at least one soluble rare-earth salt, usually an acetate and/or a chloride, is prepared; the solution is contacted with a basic medium and the resulting reaction mixture is maintained at a basic pH; and the precipitate formed by atomization or freeze-drying is recovered. Said method is useful in inorganic synthesis and catalysis.

公开(公告)号：CA2235716C

公开(公告)日：2001-06-05

申请号：CA2235716

申请日：1996-11-22

Applicant: RHODIA CHIMIE SA

Inventor： MACAUDIERE PIERRE ,  BIRCHEM THIERRY ,  TOURET OLIVIER

IPC: B01J13/00 ,  B01J23/10 ,  B01J23/76 ,  C01F17/00 ,  C01G3/00 ,  C01G25/00 ,  C01G45/00 ,  C01G49/00 ,  C10L1/10 ,  C10L1/30 ,  C10L10/02 ,  C10L10/06

Abstract: La présente invention a pour objet un procédé de traitement de suies contena nt une ou plusieurs terres rares dans lesquelles on met en contact ladite suie avec un gaz contenant de l'oxygène. Ce procédé se définit en ce qu'il compor te les étapes suivantes: (a) préparer une phase aqueuse comportant en dispersio n au moins un composé oxygéné métallifère; (b) mettre en contact, simultanémen t ou consécutivement, une suspension issue de l'étape (a) avec une phase organique comprenant au moins un agent amphiphile et de préférence un compos é ou un mélange organique jouant le rôle de solvant; (c) puis récupérer la pha se organique; et par le fait que ledit composé oxygéné métallifère est obtenu p ar un procédé comportant les étapes ci-après: on prépare une solution comprenan t au moins un sel soluble, le plus souvent un acétate et/ou un chlorure, de terre rare; on met en contact la solution avec un milieu basique et on maintient le mélange réactionnel ainsi formé à un pH basique; on récupère le précipité formé par atomisation ou lyophilisation. Application à la synthèse minérale et à la catalyse.

公开(公告)号：AT179960T

公开(公告)日：1999-05-15

申请号：AT93402828

申请日：1993-11-22

Applicant: RHODIA CHIMIE SA

Inventor： LEMAIRE JACQUES ,  PETTA DENIS ,  TOURET OLIVIER

IPC: B01D53/86 ,  B01D53/94 ,  B01J23/10 ,  B01J35/02 ,  C01F17/00 ,  C10L1/10 ,  C10L1/12 ,  C10L1/16 ,  C10L1/18 ,  C10L10/06 ,  F02B3/06 ,  C10L10/00

Abstract: Ceric oxide crystallite systems capable of catalysing a far-reaching combustion of hydrocarbon fuels, especially heavy ones (fuel oil, diesel fuel). This aggregate is defined in that its largest dimension is between 50 ANGSTROM (5 nanometres) and 10,000 ANGSTROM (1,000 nanometres), preferably between 100 ANGSTROM (10 nanometres) and 5,000 ANGSTROM (500 nanometres) and in that the size of the crystallites, measured by the Debye and Scherrer technique, is between 50 and 250 ANGSTROM (5 to 25 nanometres), preferably from 100 to 200 nanometres. Application to the purification of exhaust gases.

公开(公告)号：MX9804025A

公开(公告)日：1998-09-30

申请号：MX9804025

申请日：1998-05-21

Applicant: RHODIA CHIMIE SA

Inventor： BIRCHEM THIERRY ,  MACAUDIERE PIERRE ,  TOURET OLIVIER

IPC: B01J13/00 ,  B01J23/10 ,  B01J23/76 ,  C01F17/00 ,  C01G3/00 ,  C01G25/00 ,  C01G45/00 ,  C01G49/00 ,  C10L1/10 ,  C10L1/30 ,  C10L10/02 ,  C10L10/06

Abstract: Se presenta el método para procesar hollín que contiene una o más tierras raras, en donde este hollín se pone en contacto con un gas que contiene oxígeno. El método comprende (a) preparar una fase acuosa que comprende una dispersion de al menos un compuesto de metal oxigenado; (b) poner en contacto, de forma simultánea o consecutiva, la suspension del paso (a) con la fase orgánica que incluye al menos un agente amfifílico y preferiblemente una mezcla o compuesto orgánico como solvente; y (c) recuperar la fase orgánica; el compuesto de metal oxigenado se produce por medio de un método de acuerdo con el cual se prepara una solucion que incluye al menos una sal de tierra rara, que usualmente es acetato y/o cloruro; la solucion se pone en contacto con medio básico y la mezcla de la reaccion resultante se mantiene en un pH básico; el precipitado que se forma se recupera por atomizacion o por secado congelado. Este método es util para la síntesis y catálisis inorgánica.