Societe Nationale Des Poudres Et Explosifs

Snpe

Claude R Soriaux

Jean-Claude C Gautier

Serge L Lecolier

Sammy H Chevalier

Herv&eacute; Graindorge

Jean-Marc Bouchez

Sammy Chlvalier

A subject-matter of the present invention is novel polyglycidyl azides of general formula (I):

Polyglycidyl azides comprising an acyloxy terminal group and an azide terminal group

Liquid/liquid extraction process for copper from an aqueous sulphuric acid solution acting on the concentrated mineral or semi-finished product to be treated. The extraction is carried out in an organic solvent containing in solution an extraction agent derived from 2-phenyl-4-acyl-(3H)-pyrazol-3-ones, with the phenyl group substituted or unsubstituted. Application to the upgrading of minerals.

2-phenyl-4-acyl-(3H)-pyrazol-3-ones

Liquid/liquid extraction process for copper from an aqueous sulphuric acid solution acting on the concentrated mineral or semi-finished product to be treated. The extraction is carried out in an organic solvent containing in solution an extraction agent derived from 2-phenyl-4-acyl-(3H)-pyrazol-3-ones, with the phenyl group subsitituted or unsubstituted. Application to the upgrading of minerals.

Process for the selective extraction of copper using

The invention relates to the synthesis of tertiary phosphine oxides and also to certain tertiary phosphine oxides. According to the invention, an organic phase containing a halogenomethyl derivative, an hydroxymethylphosphine oxide and a phase transfer catalyst is reacted, in an organic medium, with an aqueous phase containing an inorganic base. The halogenomethyl derivative can be a micromolecule or a macromolecule. Tertiary phosphine oxides are substances which are useful, in particular, in fireproofing, in hydrometallurgy and in the field of plant protection.

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Athis Mons, France

Claude R Soriaux