1
Thierry Chopin, Gabriel Vilmin: Zirconium/cerium mixed oxide catalyst/catalyst support compositions having high/stable specific surfaces. Rhone Poulenc Chimie, Burns Doane Swecker & Mathis L, March 4, 1997: US05607892 (47 worldwide citation)

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 the treatment/ ...


2
Lionel Bonneau, Thierry Chopin, Gabriel Vilmin, Olivier Touret: Composition precursor and mixed cerium and zirconium oxide-based composition, and procedure for preparation and use thereof. Rhone Poulenc Chimie, Burns Doane Swecker & Mathis L, June 1, 1999: US05908800 (33 worldwide citation)

The invention concerns a procedure for preparation of a precursor of a mixed cerium and zirconium oxide-based composition, characterized by the following steps:


3
Thierry Chopin, Gabriel Vilmin: Zirconium/cerium mixed oxide catalyst/catalyst support compositions having high/stable specific surfaces. Rhone Poulenc Chimie, Burns Doane Swecker & Mathis, July 2, 1996: US05532198 (31 worldwide citation)

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 the treatment/ ...


4
Thierry Chopin, Olivier Touret, Gabriel Vilmin: Thermally stable/highly reducible catalyst compositions comprising alumina and the oxides of cerium and zirconium. Rhone Poulenc Chimie, Burns Doane Swecker & Mathis L, March 16, 1999: US05883037 (27 worldwide citation)

Thermally stable/highly reducible catalyst compositions, well suited for the catalytic conversion of exhaust gases emanating from internal combustion engines notably vehicular exhaust gases, comprise alumina, the oxides of cerium praseodymium and zirconium, and, optionally, at least one other oxide ...


5
Thierry Chopin, Gabriel Vilmin: Zirconium/cerium mixed oxide catalyst/catalyst support compositions having high/stable specific surfaces. Rhone Poulenc Chimie, Burns Doane Swecker & Mathis L, May 6, 1997: US05626826 (16 worldwide citation)

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 the treatment/ ...


6
Thierry Chopin, Olivier Touret, Gabriel Vilmin: Dispersible rare earth compositions and colloidal suspensions/catalysts comprised thereof. Rhone Poulenc Chimie, Burns Doane Swecker & Mathis L, July 18, 2000: US06090743 (9 worldwide citation)

Colloidal dispersions of finely divided particulates, well suited for the production of catalysts for the catalytic conversion of exhaust gases emanating from internal combustion engines, notably vehicular exhaust gases, comprise at least one rare earth compound and, optionally, at least one compoun ...


7
Thierry Chopin, Gabriel Vilmin: Procédé de synthèse de compositions à base doxydes mixtes de zirconium et de cérium, compositions ainsi obtenues et utilisations de ces dernières.. Rhone Poulenc Chimie, August 19, 1994: FR2701471-A1 (3 worldwide citation)

L'invention concerne un procédé pour l'obtention de compositions à base d'oxydes mixtes de zirconium et de cérium présentant des surfaces spécifiques élevées et stables thermiquement, ledit procédé étant caractérisé par le fait qu'il comprend les étapes suivantes: (i) on mélange, dans les proportion ...


8
Gabriel Vilmin, Hubert Nussbaum: Tantalum and/or niobium based mixed oxide prepn.. Rhone Poulenc Chimie, June 9, 1995: FR2713218-A1 (1 worldwide citation)

Prepn. of mixed oxides based on Ta and/or Nb and one or more other elements involves (a) forming a soln. of salts of the elements in alcoholic medium, (b) hydrolysing to form a ppte., and (c) sepg. and calcining the ppte. Step (a) may involve forming an alcoholic medium contg. the Ta and/or Nb salt ...


9
Thierry Chopin, Gabriel Vilmin: Process for the preparation of compositions based on mixed oxides of zirconium and cerium.. Rhone Poulenc Chimie, August 19, 1994: FR2701472-A1

The invention relates to a process for obtaining compositions based on mixed oxides of zirconium and cerium which have high specific surfaces and are thermally stable, the said process being characterised in that it comprises the following stages: (i) a zirconium sol, on the one hand, and a cerium s ...


10
Lionel Bonneau, Thierry Chopin, Olivier Touret, Gabriel Vilmin: Composition precursor and cerium and zirconium mixed oxide based composition, method for its preparation and use thereof. Rhone Poulenc Chimie, June 30, 1995: FR2714370-A1

Method for the preparation of a cerium and zirconium mixed oxide based composition. The method is characterized by the following stages: a liquid mixture is prepared comprising cerium and zirconium compounds; said mixture is placed in contact with a carbonate or bicarbonate and a reactive medium is ...