Societe Nationale Des Poudres Et Explosifs

Helene M Pascal

Jean-Marie L Emeury

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.

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Le Pontet, France

Helene M Pascal