The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 11, 1980
Filed:
Dec. 18, 1978
Helene M Pascal, Le Pontet, FR;
Jean-Marie L Emeury, Sorgues, FR;
Societe Nationale des Poudres et Explosifs, Paris, FR;
Abstract
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.