B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
23/351
B01D 53/00 (2006.01) B01D 19/00 (2006.01) C01C 1/12 (2006.01)
Patent
CA 1131885
PROCESS FOR THE SEPARATION OF AMMONIA AND CARBON DIOXIDE FROM MIXTURES CONTAINING AMMONIA, CARBON DIOXIDE AND WATER ABSTRACT OF THE DISCLOSURE 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 loup having an ammonia separation zone, a car- bon 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 an ammonia containing gaseous phase into the bottom of the carbon dioxide separation zone.
326484
Fetherstonhaugh & Co.
Stamicarbon B.v.
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