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.

公开(公告)号：MY129186A

公开(公告)日：2007-03-30

申请号：MYPI20024341

申请日：2002-11-20

Applicant: BASF AG

Inventor： HARTH KLAUS DR ,  SCHINDLER GOETZ-PETER DR ,  WALSDORFF CHRISTIAN DR ,  KUHRS CHRISTIAN DR ,  SIMON FALK DR

IPC: C07C17/15 ,  C07C17/02 ,  C07C17/152 ,  C07C17/156 ,  C07C17/158 ,  C07C17/25 ,  C07C17/38 ,  C07C19/045 ,  C07C21/06

Abstract: A PROCESS FOR PREPARING 1, 2-DICHLOROETHANE WHICH COMPRISES (A) FEEDING AN ETHANE-CONTAINING FEED GAS STREAM (1) INTO A DEHYDROGENATION ZONE AND DEHYDROGENATING ETHANE TO ETHENE TO GIVE A PRODUCT GAS STREAM (9) COMPRISING ETHANE, ETHENE AND SECONDARY CONSTITUENTS, (B)FEEDING THE ETHANE- AND ETHENE-CONTAINING DEHYDROGENATION PRODUCT GAS STREAM (9) AS A SINGLE STREAM OR A PLURALITY OF SUBSTREAMS, OPTIONALLY AFTER HAVING SEPARATED OFF SECONDARY CONSTITUENTS, INTO ONE OR MORE CHLORINATION ZONES, CHLORINATING ETHENE TO 1, 2-DICHLOROETHANE TO GIVE ONE OR MORE PRODUCT GAS STREAMS (9) COMPRISING 1, 2-DICHLOROETHANE, ETHANE AND POSSIBLY FURTHER SECONDARY CONSTITUENTS, ISOLATING 1, 2-DICHLOROETHANE AND ONE OR MORE ETHANE-CONTAINING CIRCULATING GAS STREAMS (11) AND RECIRCULATING THE ETHANE-CONTAINING CIRCULATING GAS STREAM OR STREAMS TO THE ETHANE DEHYDROGENATION.(FIGURE 1)