Societe Nationale Des Poudres Et Explosifs

Jean-Marie L Emeury

Helene M Pascal

Jacques Boileau

Eric P Wimmer

Jean-Paul A Kehren

Hubert H Girardon

The novel compound, tetranitroglycoluril, is described having a stability under vacuum of 6 cm.sup.3 /g/100 hours at 110.degree. C. The compound exhibits a rate of detonation at least equal to 9,073 meters per second under a density charge of 1.94, has a decomposition temperature of about 200.degree. C. and is stable at a temperature of up to 100.degree. C. at normal pressure. It may be dried at 65.degree. C. The brisance value by the Friedrich's formula is 159.7.times.10.sup.6. The rate of detonation and brisance value are superior to octogen.

Tetranitroglycoluril and method of preparation thereof

The invention relates to the synthesis of isosorbide mononitrates. The process according to the invention consists in reacting a hydrazine derivative with isosorbide dinitrate, in a polar solvent medium. The reaction is preferably carried out at the reflux temperature of the solvent medium, with an excess of the hydrazine derivative. A preferred solvent medium is a mixture of tetrahydrofuran and methanol. The process leads to the preferential formation of isosorbitol-2-mononitrate, which is a coronary vasodilator.

Process for the synthesis of isosorbide mononitrates

The invention relates to a process for the synthesis of 2,4-dinitro-6-t-butyl-3-methylanisole or musk ambrette. The process according to the invention is characterized in that 6-t-butyl-3-methylanisole is reacted with a nitrating mixture consisting of 30 to 50% of acetic acid, 20 to 30% of acetic anhydride and 25 to 45% by weight of nitric acid, at between 7.degree. and 15.degree. C. The product is recovered in the pure state with a good yield by adding small amounts of water to the crude reaction mixture. Application: Synthesis of a scented product.

Process for the synthesis of 2,4-dinitro-6-t-butyl-3-methylanisole,

The invention relates to a process for the separation of 2,4-dinitro-6-t-butyl-3-methylanisole, referred to as musk ambrette, from the crude mixtures in which it is present, which are obtained by nitrating 6-t-butyl-3-methylanisole. According to the invention, an amount of water representing from 5 to 40% by weight of the nitrating mixture used in the synthesis is introduced onto the crude synthesis mixture in a first addition, the pure musk ambrette obtained is collected and several small amounts of water, representing from 1 to 15% by weight of the said nitrating mixture used, are then introduced, the precipitated product being collected between each addition. The process makes it possible to collect, in a pure form and without the use of an organic extraction solvent, about three quarters of the musk ambrette present in the crude synthesis mixture.

Process for the separation of 2,4-dinitro-6-t-butyl-3-methylanisole,

The invention relates to a continuous process for the manufacture of dinitroglycolurile by nitrating glycolurile with absolute nitric acid. According to the invention, the nitration is carried out in at least two reactors in a cascade, a homogeneous phase being produced in the first reactor and a heterogeneous phase being produced in the second reactor. An initial nitration ratio of between 3.5 and 9 is preferably used and a temperature of between 30.degree. and 40.degree. C. and between 45.degree. and 70.degree. C. is preferably caused to prevail in the first and the second reactor respectively. If desired, at least one third reactor can be used, in which the reaction mixture is brought back to ambient temperature. Application: production of the secondary explosive DINGU, having improved stability in the crude form, with an excellent yield.

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Sorgues, France

Jean-Marie L Emeury