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:
Jul. 08, 1980
Filed:
Jun. 06, 1979
Jean-Marie L Emeury, Sorgues, FR;
Hubert H Girardon, Villeneuve les Avignon, FR;
Societe Nationale des Poudres et Explosifs, Paris, FR;
Abstract
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.