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:
Jun. 24, 2008
Filed:
Dec. 17, 2004
Henri Delalu, Lyons, FR;
Cécile Colas-duriche, Talence, FR;
Jacques Berthet, Lyons, FR;
Philippe Leurent, Toulouse, FR;
Henri Delalu, Lyons, FR;
Cécile Colas-Duriche, Talence, FR;
Jacques Berthet, Lyons, FR;
Philippe Leurent, Toulouse, FR;
Isochem, Paris, FR;
Centre National de la Recherche Scientifique (CNRS), Paris, FR;
Universite Claude Bernard Lyon 1, Villeurbanne, FR;
Abstract
The invention relates to a method for the continuous synthesis of monoalkyl-hydrazines with a functionalized alkyl group. The inventive method is characterized in that it comprises a step consisting in demixing a solution containing the synthesized monoalkyl-hydrazine, by reacting an anhydrous amine with monochloramine, in an organic phase and an aqueous phase with the addition of anhydrous sodium hydroxide. The invention can be used to obtain perfect selectivity in relation to monoalkyl-hydrazine without the presence of the di- and tri-substituted forms thereof. According to the invention, the staffing amine which has not reacted is collected and reused directly without any additional treatment.