Chopin Thierry, Touret Olivier, Macaudiere Pierre: Organic sole of or tetravalent metal oxid and their use as additive in hydrocarbon compositions.. Rhone Poulenc Chimie, September 13, 1995: EP0671205-A2 (20 worldwide citation)

A new sol compsn. which comprises:- oxide particles of a tetravalent metal; an amphiphilic acid system, and a diluent in which the particles have a d90 no more than 200 nm, and the sol has at least one of the following characteristics:- the oxide particles are in the form of crystallite agglomerates ...

Barthe Philippe, Macaudiere Pierre, Seguelong Thierry: Spinel catalyst for the reduction of nitrogen oxide emissions.. Rhone Poulenc Chimie, October 11, 1995: EP0676232-A1 (20 worldwide citation)

The use of a homogeneous catalyst of spinel structure and formula ZnAl2O4 or an oxide of spinel structure (normal or inverse) other than ZnAl2O4, for the treatment of exhaust gases with a high O2 content, is claimed. Pref. the oxide of spinel structure (normal or inverse) corresp. to the formula:- A ...

Macaudiere Pierre, Morros Jorge, Tourre Jean Michel, Tressaud Alain: Process for treating rare earth sulfide pigments, thus obtained pigments and their use.. Rhone Poulenc Chimie, December 14, 1994: EP0628608-A1 (8 worldwide citation)

The invention relates to a process for the treatment of pigments based on rare-earth sesquisulphides, aimed more particularly at improving the colour of the latter, the said process being characterised in that it consists in subjecting the said pigments to a fluoridation treatment allowing fluorine ...

Macaudiere Pierre: Rare earth sulphide composition containing at least one alkali metal element, process for its preparation and its use as colored pigment.. Rhone Poulenc Chimie, November 8, 1995: EP0680930-A1 (7 worldwide citation)

The compsns. are based on a rare earth metal sulphide doped with >= 1 alkali metal, where the sulphide is in the form of microcrystalline particles with an average size of NOTGREATER 1.5 mu m. Also claimed is: (i) a process for prepn. of a compsn. based on a rare earth metal sulphide doped with >= 1 ...

Huguenin Thierry, Macaudiere Pierre: Rare earth borate and its precursor, preparation processes and use of borate as luminophore. Rhone Poulenc Chimie, July 18, 1997: FR2743555-A1 (6 worldwide citation)

The present invention relates to a rare earth borate, a precursor thereof, their preparation processes and the use of such borate as luminophore. The rare earth borate and its precursor are characterized in that they are provided in the form of cubic, parallelepipedic or spherical particles and in t ...

Chopin Thierry, Macaudiere Pierre: Oxidn. or thermo-hydrolysis of chemical element esp. rare earths by microwave heating. Rhone Poulenc Chimie, May 31, 1996: FR2727328-A1 (3 worldwide citation)

A process for the oxidn. or thermo-hydrolysis of a chemical element effected by microwave heating of a mixt. comprising the element and a nitrate ion source. Thermo-hydrolysis is effected on a chemical soln. of the element in tetravalent form and in the presence of a nitrate source.

Huguenin Denis, Macaudiere Pierre, Mahiou Rachid: Procede de preparation dun borate de terre rare par reaction dau moins un sel de terre rare, dacide borique et dune base. Rhone Poulenc Chimie, March 6, 1998: FR2752833-A1 (2 worldwide citation)

The invention concerns a method for preparing a rare earth borate by reacting at least one rare earth salt, boric acid and a base. This method is characterised in that a reaction is carried out using excess acid with respect to stoichiometry and in conditions such that the pH of the reaction medium ...

Macaudiere Pierre, Seguelong Thierry: Compose du type lamo3, m etant laluminium, le gallium ou lindium, sous forme poudre ou sous forme frittee, son procede de preparation et son utilisation en tant que conducteur doxygene. Rhone Poulenc Chimie, May 29, 1998: FR2756270-A1 (2 worldwide citation)

The invention concerns a LaMO3 type composition, M being aluminium, gallium or indium, in powder or sintered form, its method of preparation and its use as conductor of oxygen. The compound in powder form is capable of reaching by loose powder sintering a density at least equal to 93 % of its theore ...

Macaudiere Pierre, Pescher Yvette: Process for the preparation of rare earth sulphides from halides. Rhone Poulenc Chimie, September 25, 1996: EP0733592-A1 (1 worldwide citation)

A rare earth sulphide is prepd. by reacting a rare earth halide and an alkali or Al halide, in the presence of H2S, at a temp. high enough to volatilise the halides.

Macaudiere Pierre, Huguenin Denis: Compose a base dun alcalino-terreux, de soufre et daluminium, de gallium ou dindium, son procede de preparation et son utilisation comme luminophore. Rhone Poulenc Chimie, April 30, 1998: FR2755122-A1 (1 worldwide citation)

The invention concerns a compound with a base of an alkaline-earth, sulphur and aluminium, gallium or indium, method for preparing same and use as luminophore. The compound is of formula AB2S4 in which A represents an alkaline-earth, B aluminium, gallium or indium, and it is characterised in that it ...