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    34.
    发明专利
    未知

    公开(公告)号：NO322444B1

    公开(公告)日：2006-10-09

    申请号：NO985313

    申请日：1998-11-13

    Applicant: RHODIA CHIMIE SA

    Inventor： BLANCHARD GILBERT ,  AUBERT MARYLINE ,  BIRCHEM THIERRY

    IPC: C01G25/00 ,  B01D53/86 ,  F01N3/10 ,  B01D53/94 ,  B01J23/10 ,  B01J35/00 ,  B01J35/10 ,  B01J37/03 ,  C01F17/30 ,  C07C17/15 ,  F01N3/28

    Abstract: A composition based on cerium oxide and on zirconium oxide and, optionally, on a yttrium, scandium or rare-earth metal oxide. The cerium/zirconium atomic proportion is at least 1. The compound exhibits a specific surface, after calcination for 6 hours at 900° C. of at least 35 m2/g and an oxygen storage capacity at 400° C. of at least 1.5 ml of O2/g. The composition is prepared by mixing, in a liquid medium, a cerium compound, a zirconium compound and, if appropriate, a yttrium, scandium or rare-earth metal compound; heating and calcining the precipitate obtained; and using a zirconium solution having an amount of base necessary to reach the equivalent point during an acid/base titration of the solution having a molar ratio of OH-/Zr

    35.
    发明专利
    未知

    公开(公告)号：AT228970T

    公开(公告)日：2002-12-15

    申请号：AT96924030

    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.

    38.
    发明专利
    未知

    公开(公告)号：NO992741D0

    公开(公告)日：1999-06-04

    申请号：NO992741

    申请日：1999-06-04

    Applicant: RHODIA CHIMIE SA

    Inventor： BLANCHARD GILBERT ,  QUEMERE ERIC

    IPC: B01J23/10 ,  C01F17/00 ,  C01G25/00 ,  C01G

    Abstract: The invention concerns a composition with base of cerium oxide or cerium and zirconium oxide, in extruded form, its method of preparation and its use as catalyst. The method of preparation of this composition is characterised in that it consists in extruding a hydroxide or an oxygen hydroxide of cerium or hydroxides or oxygen hydroxides of cerium and zirconium. The composition can be used as catalyst or catalyst support, particularly in the treatment of exhaust gases of internal combustion engines, in the process of dehydrogenation of ethyl benzene into styrene, in methanation catalysis, in the treatment of a solution or suspension of organic compounds by wet oxidation.

    39.
    发明专利
    未知

    公开(公告)号：AT177972T

    公开(公告)日：1999-04-15

    申请号：AT96901040

    申请日：1996-01-10

    Applicant: RHODIA CHIMIE SA

    Inventor： BLANCHARD GILBERT ,  QUEMERE ERIC ,  TOURET OLIVIER ,  VISCIGLIO VALERIE

    IPC: B01D53/94 ,  B01J23/10 ,  B01J23/34 ,  B01J23/76 ,  B01J23/83

    Abstract: PCT No. PCT/FR96/00039 Sec. 371 Date Sep. 9, 1997 Sec. 102(e) Date Sep. 9, 1997 PCT Filed Jan. 10, 1996 PCT Pub. No. WO96/21506 PCT Pub. Date Jul. 18, 1996The invention provides a catalytic composition which is based on a cerium oxide and on at least one other oxide chosen from iron, manganese and praseodymium oxides, which controls H2S emissions in the catalysis of treatment of automobile exhaust gas.

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