Total Raffinage Chimie

Dsm IP Assets B.v.

Total Raffinage Marketing

Nirappurackal Raveendran Shiju

Daniel Curulla-Ferre

Gad Rothenberg

Vincenzo Roberto Calderone

The present invention pertains to novel core-shell particles comprising a core of alumina and a shell of cobalt oxide, characterized in that they are spherical with a number average diameter, as measured by TEM, of between 10 and 30 nm. This invention also pertains to the method for preparing these core-shell particles and to their uses in the manufacture of a catalyst.

Core-shell particles with catalytic activity

The present invention pertains to novel core-shell particles comprising a core of iron oxide and a shell of cobalt oxide, characterized in that they are spherical with a number average diameter, as measured by TEM, of between 1 and 20 nm. This invention is also directed to their uses in the manufacture of a catalyst, and to the method for preparing these particles, by precipitating cobalt oxide onto magnetite or hematite particles which are themselves precipitated from Fe(III) and optionally Fe(II) salts.

The present disclosure pertains to a process for preparing an oxime in which a carbonyl compound is reacted in the liquid phase with NHand HOin the presence of a catalyst to form the corresponding oxime, wherein the catalyst comprises a catalytic component selected from the oxides of metals of group 5 and group 6. The use of a niobia catalyst is particularly preferred. The process according to the disclosure is suitable for the manufacture of numerous oximes, in particular cyclohexanone oxime.

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Amsterdam, Netherlands

Nirappurackal Raveendran Shiju