METHOD OF SEPARATION OF AMMONIA AND CARBON DIOXIDE FROM MIXTURES CONTAINING AMMONIA,CARBON DIOXDE AND WATER,申请号PL19800223507-传众专利搜索

METHOD OF SEPARATION OF AMMONIA AND CARBON DIOXIDE FROM MIXTURES CONTAINING AMMONIA,CARBON DIOXDE AND WATER

申请公布号：PL124736(B1)

申请号：PL19800223507

申请日期：1980.04.16

申请公布日期：1983.02.28

分类号：C01C1/02;B01D19/00;C01B31/20;C01C1/10;C01C1/12;F25J3/02

主分类号：C01C1/02

摘要：An improved process for the separate recovery of substantially pure ammonia and substantially pure carbon dioxide from mixtures containing ammonia and carbon dioxide, and possibly water, such as are obtained as by-products in the manufacture of melamine from urea or the synthesis of urea from ammonia and carbon dioxide. The by-product mixture is introduced into a process loop having an ammonia separation zone, a carbon dioxide separation zone and a desorption zone, the zone to which the mixture is initially fed being dependent upon its composition. The separation is effected by maintaining a system pressure differential between the ammonia and carbon dioxide separation zones, or adding diluting water to the carbon dioxide separation zone. The efficiency of the separation is enhanced by introducing a carbon dioxide containing gaseous phase, and preferably an excess of an inert gas, into the bottom of the ammonia separation zone.