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Inventor: Seon; Francoise
Address: Montreuil, FR
No. of patents: 10
Patents:
| Patent Number |
Title Of Patent |
Date Issued |
| 5496528 |
Rare earth oxides |
March 5, 1996 |
| Novel rare earth oxides having a large specific surface of at least 40 m.sup.2 /g, well adapted for catalysis, are prepared (i) by reacting at least one rare earth salt with a strong base in the presence of carboxylate ions, or by reacting at least one rare earth carboxylate with a s |
| 5466428 |
Morphologically improved ceric oxide particulates |
November 14, 1995 |
| Morphologically improved ceric oxide particulates having a grain size distribution such that the mean diameter of the aggregates thereof ranges from 0.2 to 1 .mu.m, are conveniently prepared by (i) hydrolyzing an aqueous solution of a cerium (IV) salt in an acid medium, in the presence |
| 5466428 |
Morphologically improved ceric oxide particulates |
November 14, 1995 |
| Morphologically improved ceric oxide particulates having a grain size distribution such that the mean diameter of the aggregates thereof ranges from 0.2 to 1 .mu.m, are conveniently prepared by (i) hydrolyzing an aqueous solution of a cerium (IV) salt in an acid medium, in the presence |
| 5190625 |
Electrolytic production of rare earth metals/alloys thereof |
March 2, 1993 |
| The rare earth metals, or alloys thereof, are prepared in high yields in a specially designed electrolytic cell, by electrolyzing a melt comprising (i) at least one chloride of at least one rare earth, or at least one such chloride and at least one chloride of at least one transition met |
| 5013538 |
Preparation of alkaline earth metal titanates |
May 7, 1991 |
| The alkaline earth metal titanates, well adopted for electronics applications, e.g., homogeneous powders of barium or strontium titanate, are prepared by directly reacting, in a molten salt bath medium, (a) at least one titanium compound, with (b) at least one compound A reactive the |
| 4965057 |
Process for producing morphologically improved ceric oxide particulates |
October 23, 1990 |
| Morphologically improved ceric oxide particulates having a grain size distribution such that the mean diameter of the aggregates thereof ranges from 0.2 to 1 .mu.m, are conveniently prepared by (i) hydrolyzing an aqueous solution of a cerium (IV) salt in an acid medium, (ii) adding an |
| 4913885 |
Recovery of vanadium values |
April 3, 1990 |
| Vanadium values useful for catalyst regeneration are recovered from compositions/materials comprised thereof, typically spent V.sub.2 O.sub.5 catalysts, by intimately contacting an aqueous suspension of such a material with a gaseous admixture of sulfur dioxide and oxygen, whereby a |
| 4725312 |
Production of metals by metallothermia |
February 16, 1988 |
| The metals of Groups (IV)(B) or (V)(B) of the Periodic Table, or of the lanthanide series, e.g., titanium metal, are conveniently produced, notably in powder form, by reducing a salt of such a metal by contacting same with liquid admixture comprising lithium metal maintained dispersed |
| 4636353 |
Novel neodymium/iron alloys |
January 13, 1987 |
| Novel alloys comprising neodymium, iron and optionally another rare earth metal are facilely prepared by reducing a neodymium/rare earth halide with a reducing metal, in the presence of iron. |
| 4563338 |
Selective chlorination method for mixtures of metallic oxides of natural or synthetic origin |
January 7, 1986 |
| A selective chlorination method of a mixture of simple or complex metallic oxides, comprising at least one of the elements to be used, iron, aluminum, titanium and silicon, as well as the impurities accompanying said elements, said method consisting of a grinding, a calcination, a pl |
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