Process for producing anhydrous mgcl2

Details Process for producing anhydrous mgcl2 Process for producing anhydrous mgcl2

C - Chemistry, Metallurgy

01

F

C01F 5/32 (2006.01) C22B 3/16 (2006.01) C22B 26/22 (2006.01)

Patent

CA 2260976

A process for producing anhydrous magnesium chloride comprising steps of selective calcination of Mg-containing minerals, selective leaching of magnesium by using as a leaching solvent ammonium chloride dissolved in a substantially waterfree polar organic solvent. Insoluble impurities are separated, magnesium chloride hexammoniate is precipitated and anhydrous magnesium chloride and ammonia are formed by thermal decomposition of the hexammoniate crystals.

Procédé servant à préparer du chlorure de magnésium anhydre et consistant à effectuer la calcination sélective de minéraux contenant Mg et la lixiviation sélective du magnésium au moyen de chlorure d'ammonium en tant que solvant de lixiviation, dissous dans un solvant organique polaire pratiquement exempt d'eau. Ceci permet de séparer les impuretés insolubles, de précipiter l'hexammoniate de chlorure de magnésium et d'obtenir du chlorure de magnésium anhydre et de l'ammoniac par décomposition thermique des cristaux d'hexammoniate.

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