公开(公告)号：MY141592A

公开(公告)日：2010-05-14

申请号：MYPI20040126

申请日：2004-01-16

Applicant: BASF AG

Inventor： KUHRS CHRISTIAN DR ,  DANZ ECKEHARD DR ,  STEINER WOLFGANG DR ,  RAHN RALF-THOMAS DR ,  GRASLER THOMAS DR ,  GEIER REINER DR ,  HARTH KLAUS DR ,  HOELZIE MARKUS DR

IPC: C07D251/60 ,  C07D251/62

Abstract: THE PRESENT INVENTION RELATES TO A PRECESS FOR THE CATALYTIC PREPARATION OF MELAMINE BY DECOMPOSITION OF UREA OVER PARTICULAR SOLID CATALYSTS USING A MAIN REACTOR AND AN AFTER-REACTOR. A CATALYST HAVING A LOW LEWIS ACIDITY IS USED IN THE MAIN REACTOR AND A CATALYST HAVING AN EQUAL OR PREFERABLY HIGHER LEWIS ACIDITY IS USED IN THE AFTER-REACTOR.