公开(公告)号：US3640052A

公开(公告)日：1972-02-08

申请号：US3640052D

申请日：1970-03-11

申请人： TOYO ENGINEERING CORP ,  MITSUI TOATSU CHEMICALS

发明人： KONOKI KEIZO ,  OHSAKI KOZO

IPC分类号： C01C1/02 ,  C07C67/00 ,  C07C239/00 ,  C07C273/04 ,  C07C273/10 ,  B01D53/14

CPC分类号： C07C273/10 ,  Y02C10/06

摘要： A process and apparatus for removing excess carbon dioxide from a crude ammonia synthesis gas to be used for producing ammonia and urea, in which the incoming crude ammonia synthesis gas is separated into two streams. One stream is flowed into a scrubbing zone wherein it is contacted with a scrubbing solution so that the partial pressure of the carbon dioxide in the one stream leaving the scrubbing zone is in the range of about 0.02-1.5 atmospheres, under a total pressure of above about 10 atmospheres, at a temperature of about 85*-130* C. The other stream is not scrubbed. The two streams are then combined and are fed to an ammonia and a urea synthesis system. The amount of carbon dioxide removed is changed by adjusting the amounts of gas flowing in the two streams.

摘要翻译： 用于从用于生产氨和尿素的粗氨合成气中除去过量二氧化碳的方法和装置，其中进入的粗氨合成气分离成两股。 一个流流入洗涤区域，其中其与洗涤溶液接触，使得离开洗涤区的一个流中的二氧化碳的分压在约0.02-1.5个大气压的范围内，在总压力下 约10个大气压，在约85℃-130℃的温度。另一个流不被洗涤。 然后将两股流合并，并送入氨和尿素合成系统。 通过调节在两股流中流动的气体量来改变去除的二氧化碳的量。

公开(公告)号：US3684442A

公开(公告)日：1972-08-15

申请号：US3684442D

申请日：1970-02-06

申请人： TOYO ENGINEERING CORP ,  MITSUI TOATSU CHEMICALS

发明人： KONOKI KEIZO ,  OHSAKI KOZO

IPC分类号： C07C67/00 ,  C07C239/00 ,  C07C273/10 ,  C10K1/16 ,  C01C1/04 ,  C01B2/30 ,  C07C127/00

CPC分类号： C07C273/10 ,  C10K1/16

摘要： A CRUDE AMMONIA SYNTHESIS GAS IS PASSED THROUGH A SCRUBBING ZONE IN WHICH IT IS CONTACTED BY A SCRUBBING SOLUTION COMPRISING LIQUID AMMONIA AND A SUBSTANCE FOR ASSISTING THE DISSOLUTION OF AMMONIA CARBAMATE, WITH THE AMMONIA BEING SUPPLIED AT A RATE SO THAT THE MOLAR RATIO OF NH3/CO2 IN THE SCRUBBING SOLUTION ADJACENT THE DISCHARGE END OF THE SCRUBBING ZONE IS AT LEAST 3,0:1, PREFERABLY 4.0:1 TO 20.0:1. RESIDUAL CARBON DIOXIDE IN THE AMMONIA SYNTHESIS GAS LEAVING THE SCRUBBING ZONE CAN BE REMOVED BY ADDING WATER OR AN AQUEOUS SOLUTION THERETO AND/OR BY SUBJECTING SAID GAS TO A METHANIZATION REACTION. HEAT IS REMOVED FROM SAID GAS, BY INDIRECT HEAT EXCHANGE, ONLY AFTER SUBSTANTIALLY ALL OF THE CARBON DIOXIDE HAS BEEN REMOVED THEREFROM.