公开(公告)号：WO2009050169A3

公开(公告)日：2009-07-16

申请号：PCT/EP2008063804

申请日：2008-10-14

Applicant: BASF SE ,  KERN ANDREAS ,  PROEBSTLE HANS-ULRICH ,  JOHN TILO ,  STEINER WOLFGANG ,  MAAS HEIKO

Inventor： KERN ANDREAS ,  PROEBSTLE HANS-ULRICH ,  JOHN TILO ,  STEINER WOLFGANG ,  MAAS HEIKO

IPC: C07D251/60

CPC classification number: C07D251/60 ,  C07D251/62

Abstract: The invention relates to a method for the production of melamine by reaction of urea in the presence of a solid catalyst in one or more serial reactors in the temperature range 370 °C to 430 °C, cooling and filtering the gases produced in the urea reaction, separation of the melamine by desublimation and recycling a part of the gases produced after separation of the melamine ('recycle gas') into the reactor or reactors, characterised in that all given steps are carried out at a pressure in the range 4 bar to 10 bar.

Abstract translation: 通过在固体催化剂的在一个或多个反应器中存在串联连接的温度范围内的370℃至430℃，冷却和尿素反应，过滤所得的尿素反应气体中，通过凝华分离三聚氰胺为蜜胺的制备方法 和分离气体（“循环气体”）在反应器中或反应器中，在4个绝对值的范围中的压力，其特征在于所有上述步骤后的回收利用现有的蜜胺的一部分。 高达10巴绝对值。 执行。

公开(公告)号：CL2008003049A1

公开(公告)日：2010-06-11

申请号：CL2008003049

申请日：2008-10-15

Applicant: BASF SE

Inventor： KERN ANDREAS ,  JOHN TILO ,  DR STEINER WOLFGANG ,  DR MAAS HEIKO ,  PROEBSTLE HANS-ULRICH

IPC: C07D251/60

Abstract: PROCEDIMIENTO PARA LA FABRICACIÓN DE MELAMINA QUE COMPRENDE: A)TRANSFORMAR UREA EN PRESENCIA DE UN CATALIZADOR SÓLIDO EN UNO O VARIOS REACTORES CONECTADOS EN SERIE EN EL MARGEN DE TEMPERATURA DE 370°C A 430°C; B)ENFRIAR Y FILTRAR EL GAS OBTENIDO EN LA TRANSFORMACIÓN CON UREA; C)SEPARAR LA MELAMINA POR DESUBLIMACIÓN; Y RECICLAR UNA PARTE DEL GAS PRESENTE DESPUÉS DE LA SEPARACIÓN DE LA MELAMINA ("GAS DE CIRCULACIÓN") AL REACTOR O LOS REACTORES, CUYO PROCEDIMIENTO DONDE TODOS LOS PASOS DE SÍNTESIS ARRIBA INDICADOS SE REALIZAN A UNA PRESIÓN EN LA REGIÓN DE 4 BAR ABS. A 10 BAR ABS, Y DONDE, DESPUÉS DE RETIRAR LA MELAMINA, SE RAMIFICA UNA PORCIÓN DEL GAS DE RECICLADO Y SE ALIMENTA COMO "GAS DE FLUIDIZACIÓN SIN PASARLO POR EL LAVADOR DE UREA EN EL REACTOR" Y EL GAS DE CIRCULACIÓN ES CONVERTIDO POR EL SOPLADOR DE GAS REFRIGERANTE EN EL LAVADOR DE UREA.

公开(公告)号：CA2701977C

公开(公告)日：2016-05-17

申请号：CA2701977

申请日：2008-10-14

Applicant: BASF SE

Inventor： KERN ANDREAS ,  PROEBSTLE HANS-ULRICH ,  JOHN TILO ,  STEINER WOLFGANG ,  MAAS HEIKO

IPC: C07D251/60

Abstract: The invention relates to a method for the production of melamine by reaction of urea in the presence of a solid catalyst in one or more serial reactors in the temperature range 370 °C to 430 °C, cooling and filtering the gases produced in the urea reaction, separation of the melamine by desublimation and recycling a part of the gases produced after separation of the melamine ('recycle gas') into the reactor or reactors, characterised in that all given steps are carried out at a pressure in the range 4 bar to 10 bar.

公开(公告)号：CA2701977A1

公开(公告)日：2009-04-23

申请号：CA2701977

申请日：2008-10-14

Applicant: BASF SE

Inventor： KERN ANDREAS ,  PROEBSTLE HANS-ULRICH ,  JOHN TILO ,  STEINER WOLFGANG ,  MAAS HEIKO

IPC: C07D251/60

Abstract: The invention relates to a method for the production of melamine by reaction of urea in the presence of a solid catalyst in one or more serial reactors in the temperature range 370 °C to 430 °C, cooling and filtering the gases produced in the urea reaction, separation of the melamine by desublimation and recycling a part of the gases produced after separation of the melamine ('recycle gas') into the reactor or reactors, characterised in that all given steps are carried out at a pressure in the range 4 bar to 10 bar.