Solvay & Cie (societe Anonyme)

Interox (societe Anonyme)

Solvay Sa

Solvay & Cie (societe)

Franz Legrand

Luc Lerot

Andre Lecloux

Patricia De Bruycker

Claude Declerck

Paul Deschrijver

Henri Wautier

Patricia Van Den Bossche-De Bruycker

Joel Bourjot

Process for the production of a composite of metal oxides, according to which a metal alcoholate is hydrolysed in the presence of metal (hydr)oxide particles in order to convert the metal alcoholate into a metal (hydr)oxide gel enveloping the metal (hydr)oxide particles. Powders of a composite of metal oxides obtained by this process and ceramic materials obtained by sintering a powder of this type.

Process for the production of a composite of metal oxides, composite

Process for the manufacture of a powder of mixed metal oxides by cohydrolysis of metal alcoholates in the presence of an acidic organic compound and mixed metal oxide powders in which the molar relationships R1 and R2 of a metal oxide to the sum of the metal oxides in the powder and in a particle of the powder are such that ##EQU1## The process applies especially well to powders of zirconia doped with yttrium oxide or other oxides.

Process for the manufacture of a powder of mixed metal oxides, and mixed

Epoxides are manufactured by reacting olefines, such as cyclohexene, isoamylene, alpha-pinene, allyl alcohol, 2,5-dihydrofuran and styrene, with hydrogen peroxide, in a homogeneous liquid reaction mixture containing less than 10% by weight of water, in the presence of a compound of a metal of group 6a, such as selenium dioxide or selenous acid, and of an organic nitrogen-containing base having a pKa of not more than 8, such as pyridine, chloropyridine, collidine, quinoline, isoquinoline or a lutidine.

Process for the manufacture of epoxides

Aromatic tertiary amines are oxidized by means of hydrogen peroxide in an inert solvent medium in the presence of a catalyst selected from metal selenium and compounds of selenium. The process is applied to the preparation of oxides of heterocyclic aromatic tertiary amines and oxides of non-heterocyclic tertiary amines, in which the nitrogen atom is substituted by at least 1 aromatic nucleus.

Process for the production of oxides of aromatic tertiary amines

Process for the manufacture of a powder of mixed metal oxides by cohydrolysis of metal alcoholates in the presence of an acidic organic compound and mixed metal oxide powders in which the molar relationships R.sub.1 and R.sub.2 of a metal oxide to the sum of the metal oxides in the powder and in a particle of the powder are such that ##EQU1## The process applies to powders of zirconia doped with yttrium oxide.

Process for the manufacture of vitreous metal oxides in which a metal alcoholate derived from an alcohol, the pka of which is less than 15.74, is hydrolysed with an aqueous medium, the pH of which is greater than 1.5. The process is applied especially to the manufacture of vitreous zirconium oxide.

Process for the manufacture of vitreous metal oxides

Secondary amines are oxidized with hydrogen peroxide in the presence of a catalyst chosen from derivatives of zinc or cadmium. The process is applied to the preparation of di-substituted N,N-hydroxylamines such as N,N-diethylhydroxylamines and N,N-di-n-propylhydroxylamine.

Process for the preparation of hydroxylamines and products thereby

Process for the manufacture of a metal oxide powder for ceramic materials by the hydrolysis of a metal alcoholate in the presence of an acidic organic compound. The process applies to the production of metal oxide powders, such as zirconia powders, with a mean particle diameter of between 0.05 and 2 microns.

Process for the manufacture of a metal oxide powder for ceramic

A metal alcoholate is treated with a quantity of water such that the molar ratio of the quantity of water to the quantity of metal alcoholate is lower than the valency of the metal in the alcoholate.

Process for the manufacture of a powder for ceramic materials,

2,2,2-Trifluoroethanol is obtained by catalytic oxidation of 1,1-difluoroethylene. The 2,2,2-trifluoroethanol thus obtained is used as a solvent or as a synthesis intermediate.

Process for the preparation of 2,2,2-trifluoroethanol

A process for the production of carboxyl compounds such as caprolactones, in which the corresponding carbonyl compounds are oxidized with hydrogen peroxide in the presence of a catalyst in a substantially anhydrous liquid medium. The water formed by the reaction and any water introduced into the reaction mixture are removed from the reaction mixture.

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Quaregnon, Belgium

Franz Legrand