公开(公告)号：DE3041324A1

公开(公告)日：1982-06-16

申请号：DE3041324

申请日：1980-11-03

Applicant: BASF AG

Inventor： BLANCK KLAUS DIPL CHEM DR ,  DETHLEFSEN WINFRIED DIPL CHEM ,  JUNGBAUER ANTON DIPL CHEM DR ,  LEUTNER BERND DIPL CHEM DR ,  SCHIER ERNST-JUERGEN DIPL CHEM ,  SCHLIMPER HANS-ULRICH DIPL CHE ,  SCHNEEHAGE HANS DIPL CHEM DR

IPC: C07D251/60 ,  B01D53/86 ,  B01J23/00 ,  B01J23/72 ,  B01J23/745 ,  C01C1/12 ,  C07B61/00 ,  B01D53/36

Abstract: The reaction off-gas from the synthesis of melamine consists, after separating off the melamine, mainly of ammonia and carbon dioxide, with traces of hydrogen cyanide, isocyanic acid, urea and residual melamine. To remove these trace components, the off-gas is passed over a catalyst, containing copper oxide and/or iron oxide, in the presence of steam at from 100 DEG to 500 DEG C.