METHOD AND APPARATUS FOR PERFORMING THE FIRST STEP OF SEPARATING CONSTITUENTS OF A REACTION MIXTURE OBTAINED DURING THE SYNTHESIS OF ASYMMETRIC DIMETHYLHYDRAZINE BY THE RASCHIG PROCESS

摘要

P THE PRESENT INVENTION CONCERNS A PROCESS FOR CARRYING OUT THE FIRST STEP OF SEPARATING CONSTITUENTS OF A REACTION MIXTURE OBTAINED DURING THE SYNTHESIS OF ASYMMETRIC DIMETHYLHYDRAZINE BY THE RASCHIG PROCESS, CONSISTING OF A PRIMARY DISTILLATION AND A PRIMARY DISTILLATION. SUBSEQUENT DISTILLATIONS, IT ALSO CONCERNS APPARATUS FOR THE IMPLEMENTATION OF THE PROCESS PREFERABLY INCLUDING AN EMPTY COLUMN SECTION B OVERCOMING A TRAY COLUMN AND OVERCOMING ANOTHER C TRAY COLUMN. /P