Method for the production of hns ii

Details Method for the production of hns ii Method for the production of hns ii

C - Chemistry, Metallurgy

07

C

260/612.9

C07C 205/06 (2006.01) C07C 201/16 (2006.01)

Patent

CA 1339470

The invention relates to a method for the production of a 2,2',4,4',6,6'-hexanitrostilbene (HNS) with specified purity and bulk density, generally referred to as HNS II, from a less pure raw-product with lower bulk density, generally referred to as HNS I. According to the invention, the raw-product is purified through recrystallisation from a solvent, of which N-methylpyrrolidone gives by far the best result, while the bulk density of the product is increased by ultrasonically treating the resulting crystals, thereby decreasing their length to bredth ratio.

556901

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