Ferraz

Adir Et Compagine

Henri Delalu

Jean-Jacques Counioux

Gerard Marichy

Armand Cohen

Laurent Peyrot

Olivier Bucher

Mazen Elkhatib

Alain R Marchand

The present invention relates to a process for the preparation of high-grade chloramine by the action of commercial eau de Javelle of 100 chlorometric degrees on a solution of ammonia in the presence of ammonium chloride. According to this process, the chloramine is obtained having a content greater than or equal to 2 mol L,, that is to say, greater than or equal to 10.3%. The process can be carried out continuously or discontinuously.

Synthesis method for solution with high grade chloramine

A method of manufacturing metal alloys to obtain a homogeneous powder made up of oxides of the metals and applications thereof to the manufacture of semiconductors and superconductors comprises, after placing the various metals selected in a crucible, melting the metals in a neutral or reducing atmosphere while stirring the liquid to homogenize it, recovering the liquid alloy, spraying the alloy obtained to form homogeneous powder particles of determined particle size, and oxidizing the particles. It applies to the manufacture of zinc oxide-based varistor type semiconductor ceramics and to the manufacture of superconductor products or positive or negative temperature coefficient thermistors.

Method of manufacturing semiconductors from homogeneous metal oxide

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Lyons, France

Henri Delalu