公开(公告)号：DE10301703A1

公开(公告)日：2004-07-29

申请号：DE10301703

申请日：2003-01-17

Applicant: BASF AG

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

IPC: C07D251/60 ,  B01J21/04 ,  B01J21/12

Abstract: Production of melamine by urea decomposition using a solid catalyst takes place in a main reactor containing a catalyst of low Lewis acidity and a post-reactor containing a catalyst of the same or higher (especially higher) Lewis acidity.

公开(公告)号：CA2691642A1

公开(公告)日：2008-12-24

申请号：CA2691642

申请日：2008-06-20

Applicant: BASF AG

Inventor： ISELBORN STEFAN ,  GEIER REINER ,  HEPFER BENJAMIN ,  BECHTEL MARCUS ,  WILLE MICHAEL ,  DAISS ANDREAS

IPC: B01J8/00 ,  B01D3/00 ,  B01J8/02 ,  C10G49/00

Abstract: The invention relates to a reactor (R) for performing a three-phase react ion of a fluid phase (1) and a gaseous phase (2) on a packed bed catalyst (F ), the packed bed catalyst (F) being disposed horizontally in the reactor (R ) and the fluid phase (1) and the gaseous phase (2) being fed through the re actor (R) from the bottom to the top, using a mixing and distributing device (MV) across the packed bed catalyst (F), characterized in that the mixing a nd distributing device (MV) comprises a trough distributor (TV) for the flui d phase (1) having trough-shaped channels (K) and drain tubes (A) in the tro ugh-shaped channels (K) for the fluid phase (1), and a distributor floor (B) disposed below and at a distance from the trough distributor (TV) in which vertical spouts (T) are disposed, having one or more openings (P1) for the i nlet of the gaseous phase (2) and one or more openings (P2) disposed below t he openings (P1) for the inlet of the gaseous phase, for the inlet of the fl uid phase (1) into the spouts (T), and the number and size of the openings ( P2) for the inlet of the fluid phase (1) being designed such that the fluid level on the distribution floor (B) is adjusted to be below the openings (P1 ) for the inlet of the gaseous phase (2) and above the openings (P2) for the inlet of the fluid phase (1) for a prescribedinlet flow of fluid.

公开(公告)号：DE10337501A1

公开(公告)日：2005-04-14

申请号：DE10337501

申请日：2003-08-14

Applicant: BASF AG

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

IPC: C07D251/60

Abstract: Production of melamine by urea decomposition using a solid catalyst takes place in a main reactor containing a catalyst of low Lewis acidity and a post-reactor containing a catalyst of the same or higher (especially higher) Lewis acidity.

公开(公告)号：DE10342566A1

公开(公告)日：2005-04-07

申请号：DE10342566

申请日：2003-09-15

Applicant: BASF AG

Inventor： MUELLER-EVERSBUSCH MAYKE ,  SCHOENFELDER HENDRIK ,  GEIER REINER ,  HOELZLE MARKUS ,  GRASLER THOMAS ,  KUHRS CHRISTIAN ,  RAHN RALF-THOMAS

IPC: B01J8/00 ,  B01J8/18 ,  C07D251/60

Abstract: Producing melamine by reacting urea at 350-450[deg]C and up to 20 bar in the presence of a catalyst in the form of a fluidized bed comprises using a fluidized bed reactor with a conical base (5). An independent claim is also included for a reactor for carrying out the above process, comprising a product gas outlet (20) in a top section (19) of the reactor and a fluidizing gas inlet (8) located beneath the contents of the reactor, where the reactor is conical.