Procede et appareillage pour realiser la premiere etape de separation de constituants d'un melange reactionnel obtenu lors de la synthese de la dimethylhydrazine asymetrique par le procede raschig

Abstract

<P>LA PRESENTE INVENTION CONCERNE UN PROCEDE POUR REALISER LA PREMIERE ETAPE DE SEPARATION DE CONSTITUANTS D'UN MELANGE REACTIONNEL OBTENU LORS DE LA SYNTHESE DE LA DIMETHYLHYDRAZINE ASYMETRIQUE PAR LE PROCEDE RASCHIG, CONSISTANT EN UNE DISTILLATION PRIMAIRE A TAUX DE REFLUX CONTROLE ET A DES DISTILLATIONS ULTERIEURES, ELLE CONCERNE EGALEMENT UN APPAREILLAGE POUR LA MISE EN OEUVRE DU PROCEDE COMPORTANT DE PREFERENCE UN TRONCON DE COLONNE VIDE B SURMONTANT UNE COLONNE A PLATEAU A ET SURMONTER D'UNE AUTRE COLONNE A PLATEAU C.</P>
The present invention relates to a process for carrying out the first stage of separation of constituents of a reaction mixture obtained during synthesis of asymmetric dimethylhydrazine by the Raschig method, consisting in sending, into an empty central section (B) of a column, the reaction mixture coming from said synthesis, this central section being surmounted by a column (C) in which is effected separation of the volatile compounds contained in said mixture and being extended downwardly by an exhausting section (A).

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